diff --git a/README.md b/README.md
index 186a95b..62c8c3c 100644
--- a/README.md
+++ b/README.md
@@ -134,8 +134,11 @@ plugins:
       priority: 1
       session_token: "YOUR_COMMANDCODE_SESSION_TOKEN" # 支持纯 token 或完整 Cookie 字符串
       api_base: "https://api.commandcode.ai" # 可选，默认为官方接口
-      opencode_api_key: "sk-YOUR_OPENCODE_GO_API_KEY" # v0.3.0+ 可选，OpenCode Go 用量查询
-      opencode_api_base: "https://opencode.ai/zen/go/v1" # v0.3.0+ 可选，默认为官方接口
+      opencode_api_key: "sk-YOUR_OPENCODE_GO_API_KEY" # 可选（单 key 兑底，v0.3.0+）
+      # v0.4.0+ 多 key：list 优先于单 key 字段，每 key 独立账号独立配额窗口
+      opencode_api_keys:
+        - "sk-KEY1..."
+        - "sk-KEY2..."
 ```
 
 ---
@@ -212,51 +215,71 @@ plugins:
 
 - **端点**：`GET /v0/management/plugins/commandcode/opencode/usage`（认证同上，仅读插件配置；凭据覆盖走 POST）
 - **端点**：`POST /v0/management/plugins/commandcode/opencode/usage`
-- **POST 请求体**：
+- **POST 请求体**（多 key 数组优先；scalar 为 v0.3.0 兼容）：
 
 ```json
-{ "opencode_api_key": "sk-YOUR_TEMPORARY_KEY" }
+{ "opencode_api_keys": ["sk-KEY1", "sk-KEY2"] }
 ```
 
-- **响应示例**：
+- **响应（v0.4.0+，逐 key 结果数组）**：
 
 ```json
 {
   "ok": true,
   "provider": "opencode_go",
-  "windows": {
-    "rolling": { "status": "ok", "percent": 4, "exceeded": false,
-                 "reset_at": "2026-09-17T06:58:53Z", "reset_in_seconds": 2520 },
-    "weekly":  { "status": "ok", "percent": 46, "exceeded": false,
-                 "reset_at": "2026-09-21T00:00:00Z", "reset_in_seconds": 259200 },
-    "monthly": { "status": "ok", "percent": 23, "exceeded": false,
-                 "reset_at": "2026-10-14T09:13:49Z", "reset_in_seconds": 1728000 }
-  },
-  "updated_at": "2026-09-16T12:00:00Z"
+  "keys": [
+    {
+      "key_id": "sk-L…KqYB",
+      "ok": true,
+      "windows": {
+        "rolling": { "status": "ok", "percent": 4, "exceeded": false,
+                     "reset_at": "2026-09-17T06:58:53Z", "reset_in_seconds": 2520 },
+        "weekly":  { "status": "ok", "percent": 46, "exceeded": false,
+                     "reset_at": "2026-09-21T00:00:00Z", "reset_in_seconds": 259200 },
+        "monthly": { "status": "ok", "percent": 23, "exceeded": false,
+                     "reset_at": "2026-10-14T09:13:49Z", "reset_in_seconds": 1728000 }
+      },
+      "updated_at": "2026-09-16T12:00:00Z",
+      "status_code": 200
+    },
+    {
+      "key_id": "sk-U…PNHn",
+      "ok": false,
+      "updated_at": "2026-09-16T12:00:01Z",
+      "status_code": 401,
+      "error": "opencode upstream returned 401: check opencode_api_key"
+    }
+  ],
+  "updated_at": "2026-09-16T12:00:01Z"
 }
 ```
 
+- `key_id` 为服务端脱敏标识（前4+…+后4），原始 key 永不出现在响应中；失败 key 无 `windows` 字段，单 key 失败不影响其他 key。
+- **HTTP 状态**：≥1 key 成功 → 200；key 全配但全失败 → 502；未配置任何 key → 400。
+
 ### 5. 管理 API: 聚合查询 (`all`)
 
 - **端点**：`GET /v0/management/plugins/commandcode/all`（仅读插件配置）
 - **端点**：`POST /v0/management/plugins/commandcode/all`
-- **POST 请求体**（可只带其一）：
+- **POST 请求体**（可只带其一；多 key 覆盖为数组）：
 
 ```json
-{ "session_token": "...", "opencode_api_key": "sk-..." }
+{ "session_token": "...", "opencode_api_keys": ["sk-KEY1", "sk-KEY2"] }
 ```
 
-- **部分失败语义**：HTTP 200 表示至少一个 provider 成功；失败 provider 记入 `errors`，其响应字段（`commandcode`/`opencode`）整个省略；全失败且为本地凭据缺失 → 400，全失败且为上游错误 → 502。
+- **部分失败语义**：HTTP 200 表示至少一个 provider（Command Code 或 ≥1 个 OpenCode key）成功；失败 provider 记入 `errors`，其响应字段整个省略；全失败且为本地凭据缺失 → 400，全失败且为上游错误 → 502。
 
 ```json
 {
   "ok": true,
   "commandcode": { "ok": true, "plan": {...}, "credits": {...}, "window_limits": {...}, "updated_at": "..." },
-  "opencode": { "ok": true, "provider": "opencode_go", "windows": {...}, "updated_at": "..." },
+  "opencode": { "ok": true, "provider": "opencode_go", "keys": [ ...同上... ], "updated_at": "..." },
   "updated_at": "2026-09-16T12:00:00Z"
 }
 ```
 
+> **v0.4.0 breaking note**：`opencode` 字段从单 key 对象变为 `{ok, provider, keys[], updated_at}` 多 key 结构（keys[].windows 为 v0.3.0 原窗口结构）。唯一消费方是同仓 QuotaCard 资源页，已同版本同步更新。
+
 ---
 
 ## 用量数据结构说明
@@ -275,9 +298,10 @@ plugins:
 | `window_limits.five_hour.reset_in_seconds`| `int64` | 距离 5 小时窗口重置的剩余秒数 |
 | `window_limits.weekly.*` | - | 每周限额对应指标（结构同 5 小时窗口） |
 | `windows.<rolling\|weekly\|monthly>.status` | `string` | OpenCode Go 窗口状态（`"ok"`/上游其他值，未知值不报错） |
-| `windows.<...>.percent` | `float64` | OpenCode Go 窗口使用百分比（0-100，钳制） |
-| `windows.<...>.exceeded` | `bool` | `percent >= 100` 或上游 `status == "exceeded"` |
-| `windows.<...>.reset_at` / `reset_in_seconds` | `string` / `int64` | OpenCode Go 窗口重置时间（解析失败优雅降级为空/0） |
+| `keys[].key_id` | `string` | 服务端脱敏 key 标识（前4+…+后4），原始 key 不出响应 |
+| `keys[].ok` | `bool` | 该 key 查询是否成功（单 key 401 隔离） |
+| `keys[].windows.<...>` | `object` | 成功 key 的三窗口指标（结构同上；失败 key 无此字段） |
+| `keys[].status_code` / `error` | `int` / `string` | 该 key 上游 HTTP 状态与失败原因 |
 
 ---
 
diff --git a/plugin/management.go b/plugin/management.go
index f6dcbc8..8a8dba8 100644
--- a/plugin/management.go
+++ b/plugin/management.go
@@ -273,36 +273,91 @@ func executeUsageQuery(ctx context.Context, apiBase, sessionToken, hostCallbackI
 }
 
 // handleOpenCodeUsage serves GET/POST /plugins/commandcode/opencode/usage.
-// Credentials can be overridden via POST body only (opencode_api_key / api_key);
-// GET queries are read-only against the plugin config — query parameter
-// overrides are intentionally not supported to keep secrets out of URLs.
+// Credentials can be overridden via POST body only (opencode_api_keys list /
+// opencode_api_key scalar); GET queries are read-only against the plugin
+// config — query parameter overrides are intentionally not supported to keep
+// secrets out of URLs.
+//
+// The response is the multi-key OpenCodeMultiKeyResponse envelope (v0.4.0):
+// >=1 key succeeded → 200; keys configured but all upstream-failed → 502; no
+// keys configured at all → 400 with a top-level "no opencode api keys
+// configured ..." error.
 func handleOpenCodeUsage(ctx context.Context, req ManagementRequest, cfg *PluginConfig) (ManagementResponse, error) {
-	apiKey := ""
 	apiBase := ""
+	var keys []string
 
-	if strings.EqualFold(strings.ToUpper(strings.TrimSpace(req.Method)), http.MethodPost) && len(req.Body) > 0 {
+	if req.Method == http.MethodPost && len(req.Body) > 0 {
 		var body struct {
-			OpenCodeAPIKey  string `json:"opencode_api_key"`
-			APIKey          string `json:"api_key"`
-			OpenCodeAPIBase string `json:"opencode_api_base"`
+			OpenCodeAPIKeys []string `json:"opencode_api_keys"`
+			OpenCodeAPIKey  string   `json:"opencode_api_key"`
+			APIKey          string   `json:"api_key"`
+			OpenCodeAPIBase string   `json:"opencode_api_base"`
 		}
 		_ = json.Unmarshal(req.Body, &body)
-		apiKey = body.OpenCodeAPIKey
-		if apiKey == "" {
-			apiKey = body.APIKey
+		keys = normalizeOpenCodeKeys(body.OpenCodeAPIKeys)
+		if len(keys) == 0 {
+			single := strings.TrimSpace(body.OpenCodeAPIKey)
+			if single == "" {
+				single = strings.TrimSpace(body.APIKey)
+			}
+			if single != "" {
+				keys = []string{single}
+			}
 		}
 		apiBase = body.OpenCodeAPIBase
 	}
 
 	// Fallback to plugin config
-	if apiKey == "" && cfg != nil {
-		apiKey = cfg.GetOpenCodeAPIKey()
+	if len(keys) == 0 && cfg != nil {
+		keys = cfg.GetOpenCodeAPIKeys()
 	}
 	if apiBase == "" && cfg != nil {
 		apiBase = cfg.GetOpenCodeAPIBase()
 	}
 
-	return handleOpenCodeUsageWithKey(ctx, apiBase, apiKey, req.HostCallbackID)
+	now := time.Now().UTC()
+	if len(keys) == 0 {
+		resBytes, _ := json.Marshal(OpenCodeMultiKeyResponse{
+			OK:        false,
+			Provider:  "opencode_go",
+			Keys:      []OpenCodeKeyResult{},
+			UpdatedAt: now.Format(time.RFC3339),
+			Error:     "no opencode api keys configured. Configure opencode_api_keys (YAML list) or opencode_api_key in the plugin config, or pass opencode_api_keys in the POST body",
+		})
+		return ManagementResponse{
+			StatusCode: http.StatusBadRequest,
+			Headers: map[string][]string{
+				"Content-Type": {"application/json"},
+			},
+			Body: resBytes,
+		}, nil
+	}
+
+	results := QueryOpenCodeKeys(ctx, apiBase, keys, req.HostCallbackID)
+	succeeded := 0
+	for _, r := range results {
+		if r.OK {
+			succeeded++
+		}
+	}
+
+	statusCode := http.StatusOK
+	if succeeded == 0 {
+		statusCode = http.StatusBadGateway
+	}
+	resBytes, _ := json.Marshal(OpenCodeMultiKeyResponse{
+		OK:        succeeded > 0,
+		Provider:  "opencode_go",
+		Keys:      results,
+		UpdatedAt: now.Format(time.RFC3339),
+	})
+	return ManagementResponse{
+		StatusCode: statusCode,
+		Headers: map[string][]string{
+			"Content-Type": {"application/json"},
+		},
+		Body: resBytes,
+	}, nil
 }
 
 // handleAllUsage serves GET/POST /plugins/commandcode/all: it queries both
@@ -314,24 +369,30 @@ func handleOpenCodeUsage(ctx context.Context, req ManagementRequest, cfg *Plugin
 // all failed due to upstream errors → 502.
 func handleAllUsage(ctx context.Context, req ManagementRequest, cfg *PluginConfig) (ManagementResponse, error) {
 	sessionToken := ""
-	opencodeKey := ""
+	opencodeKeys := []string{}
 
-	if strings.EqualFold(strings.ToUpper(strings.TrimSpace(req.Method)), http.MethodPost) && len(req.Body) > 0 {
+	if req.Method == http.MethodPost && len(req.Body) > 0 {
 		var body struct {
-			SessionToken   string `json:"session_token"`
-			OpencodeAPIKey string `json:"opencode_api_key"`
+			SessionToken    string   `json:"session_token"`
+			OpencodeAPIKeys []string `json:"opencode_api_keys"`
+			OpencodeAPIKey  string   `json:"opencode_api_key"`
 		}
 		_ = json.Unmarshal(req.Body, &body)
 		sessionToken = body.SessionToken
-		opencodeKey = body.OpencodeAPIKey
+		opencodeKeys = normalizeOpenCodeKeys(body.OpencodeAPIKeys)
+		if len(opencodeKeys) == 0 {
+			if single := strings.TrimSpace(body.OpencodeAPIKey); single != "" {
+				opencodeKeys = []string{single}
+			}
+		}
 	}
 
 	// Fallback to plugin config
 	if sessionToken == "" && cfg != nil {
 		sessionToken = cfg.GetSessionToken()
 	}
-	if opencodeKey == "" && cfg != nil {
-		opencodeKey = cfg.GetOpenCodeAPIKey()
+	if len(opencodeKeys) == 0 && cfg != nil {
+		opencodeKeys = cfg.GetOpenCodeAPIKeys()
 	}
 	apiBase := ""
 	if cfg != nil {
@@ -364,25 +425,34 @@ func handleAllUsage(ctx context.Context, req ManagementRequest, cfg *PluginConfi
 		}
 	}
 
-	// Provider 2: OpenCode Go (same classification via isLocalCredentialError,
-	// not by HTTP 400 alone: upstream 4xx may be passed through and must not
-	// be misclassified as a local configuration problem).
-	if strings.TrimSpace(opencodeKey) != "" {
-		ocResp, _ := handleOpenCodeUsageWithKey(ctx, ocAPIBase, opencodeKey, req.HostCallbackID)
-		if ocResp.StatusCode == http.StatusOK {
-			resp.OpenCode = ocResp.Body
-			succeeded++
-		} else {
-			ocErr := extractErrorResponseMessage(ocResp.Body)
-			errs["opencode"] = ocErr
-			if isLocalCredentialError(ocErr) {
-				localMissing++
-			} else {
-				upstreamFailed++
+	// Provider 2: OpenCode Go, one sequential query per configured key
+	// (v0.4.0). >=1 key success counts the provider as successful and the
+	// multi-key payload is inlined; keys configured but all failed is an
+	// upstream failure (a configured-but-invalid key is NOT a local config
+	// problem); zero keys configured is a local missing-credential error.
+	if len(opencodeKeys) > 0 {
+		results := QueryOpenCodeKeys(ctx, ocAPIBase, opencodeKeys, req.HostCallbackID)
+		succeededKeys := 0
+		for _, r := range results {
+			if r.OK {
+				succeededKeys++
 			}
 		}
+		if succeededKeys > 0 {
+			ocBytes, _ := json.Marshal(OpenCodeMultiKeyResponse{
+				OK:        true,
+				Provider:  "opencode_go",
+				Keys:      results,
+				UpdatedAt: now.Format(time.RFC3339),
+			})
+			resp.OpenCode = ocBytes
+			succeeded++
+		} else {
+			errs["opencode"] = fmt.Sprintf("all %d opencode keys failed", len(opencodeKeys))
+			upstreamFailed++
+		}
 	} else {
-		errs["opencode"] = "missing opencode_api_key: configure opencode_api_key in plugin config or pass it in the request body"
+		errs["opencode"] = "no opencode api keys configured. Configure opencode_api_keys (YAML list) or opencode_api_key in the plugin config, or pass opencode_api_keys in the POST body"
 		localMissing++
 	}
 
@@ -419,6 +489,7 @@ func isLocalCredentialError(msg string) bool {
 	for _, prefix := range []string{
 		"session_token is required",
 		"opencode_api_key is required",
+		"no opencode api keys configured",
 	} {
 		if strings.HasPrefix(msg, prefix) {
 			return true
@@ -427,81 +498,51 @@ func isLocalCredentialError(msg string) bool {
 	return false
 }
 
-// handleOpenCodeUsageWithKey runs the OpenCode usage query with an explicit
-// credential, shared by handleOpenCodeUsage and handleAllUsage.
-func handleOpenCodeUsageWithKey(ctx context.Context, apiBase, apiKey, hostCallbackID string) (ManagementResponse, error) {
-	if strings.TrimSpace(apiKey) == "" {
-		resBytes, _ := json.Marshal(map[string]any{
-			"ok":    false,
-			"error": "opencode_api_key is required. Configure opencode_api_key in plugin config or pass it in the request body",
-		})
-		return ManagementResponse{
-			StatusCode: http.StatusBadRequest,
-			Headers: map[string][]string{
-				"Content-Type": {"application/json"},
-			},
-			Body: resBytes,
-		}, nil
+// queryOpenCodeKey runs the OpenCode Go usage query for a single API key and
+// returns a typed per-key result, shared by handleOpenCodeUsage and
+// handleAllUsage (via QueryOpenCodeKeys). The handler layer is responsible
+// for marshaling the aggregate response and picking the HTTP status code.
+func queryOpenCodeKey(ctx context.Context, apiBase, key, hostCallbackID string) (OpenCodeKeyResult, error) {
+	now := time.Now().UTC()
+	res := OpenCodeKeyResult{
+		KeyID:     MaskAPIKey(key),
+		UpdatedAt: now.Format(time.RFC3339),
 	}
 
-	raw, statusCode, errFetch := FetchOpenCodeUsageRaw(ctx, apiBase, apiKey, hostCallbackID)
+	if strings.TrimSpace(key) == "" {
+		res.StatusCode = http.StatusBadRequest
+		res.Error = "opencode_api_key is required. Configure opencode_api_keys in plugin config or pass it in the request"
+		return res, nil
+	}
+
+	raw, statusCode, errFetch := FetchOpenCodeUsageRaw(ctx, apiBase, key, hostCallbackID)
 	if errFetch != nil {
-		errMsg := fmt.Sprintf("opencode upstream request failed: %s", errFetch.Error())
-		resBytes, _ := json.Marshal(map[string]any{
-			"ok":          false,
-			"status_code": statusCode,
-			"error":       errMsg,
-		})
 		if statusCode == 0 || statusCode == http.StatusOK {
 			statusCode = http.StatusBadGateway
 		}
-		return ManagementResponse{
-			StatusCode: statusCode,
-			Headers: map[string][]string{
-				"Content-Type": {"application/json"},
-			},
-			Body: resBytes,
-		}, nil
+		res.StatusCode = statusCode
+		res.Error = fmt.Sprintf("opencode upstream request failed: %s", errFetch.Error())
+		return res, nil
 	}
 
 	if statusCode != http.StatusOK {
-		resBytes, _ := json.Marshal(map[string]any{
-			"ok":          false,
-			"status_code": statusCode,
-			"error":       fmt.Sprintf("opencode upstream returned %d: check opencode_api_key", statusCode),
-		})
-		return ManagementResponse{
-			StatusCode: statusCode,
-			Headers: map[string][]string{
-				"Content-Type": {"application/json"},
-			},
-			Body: resBytes,
-		}, nil
+		res.StatusCode = statusCode
+		res.Error = fmt.Sprintf("opencode upstream returned %d: check opencode_api_key", statusCode)
+		return res, nil
 	}
 
-	usage, errParse := ParseOpenCodeUsage(raw, time.Now().UTC())
+	usage, errParse := ParseOpenCodeUsage(raw, now)
 	if errParse != nil {
-		resBytes, _ := json.Marshal(map[string]any{
-			"ok":    false,
-			"error": "failed to parse opencode upstream usage: " + errParse.Error(),
-		})
-		return ManagementResponse{
-			StatusCode: http.StatusBadGateway,
-			Headers: map[string][]string{
-				"Content-Type": {"application/json"},
-			},
-			Body: resBytes,
-		}, nil
+		res.StatusCode = http.StatusBadGateway
+		res.Error = "failed to parse opencode upstream usage: " + errParse.Error()
+		return res, nil
 	}
 
-	resBytes, _ := json.Marshal(usage)
-	return ManagementResponse{
-		StatusCode: http.StatusOK,
-		Headers: map[string][]string{
-			"Content-Type": {"application/json"},
-		},
-		Body: resBytes,
-	}, nil
+	res.OK = true
+	res.StatusCode = http.StatusOK
+	res.Windows = &usage.Windows
+	res.UpdatedAt = usage.UpdatedAt
+	return res, nil
 }
 
 // extractErrorResponseMessage pulls the "error" field out of a JSON error body.
diff --git a/plugin/management_test.go b/plugin/management_test.go
index 7c4f4b9..62d255b 100644
--- a/plugin/management_test.go
+++ b/plugin/management_test.go
@@ -74,6 +74,9 @@ func TestHandleManagement_QuotaResource(t *testing.T) {
 		if !strings.Contains(bodyStr, "用量配额") {
 			t.Errorf("Body does not contain expected menu text 用量配额")
 		}
+		if !strings.Contains(bodyStr, "v0.4.0") {
+			t.Errorf("Body does not contain version badge v0.4.0")
+		}
 	}
 }
 
@@ -230,19 +233,30 @@ func TestHandleManagement_OpencodeUsageRoute(t *testing.T) {
 			if resp.StatusCode != http.StatusOK {
 				t.Fatalf("StatusCode = %d, want 200, body=%s", resp.StatusCode, string(resp.Body))
 			}
-			var usage OpenCodeFormattedUsageResponse
+			// v0.4.0: the response is the multi-key envelope even for a single key.
+			var usage OpenCodeMultiKeyResponse
 			if err := json.Unmarshal(resp.Body, &usage); err != nil {
 				t.Fatalf("unmarshal body error: %v", err)
 			}
 			if !usage.OK || usage.Provider != "opencode_go" {
 				t.Fatalf("unexpected response: ok=%v provider=%q", usage.OK, usage.Provider)
 			}
-			if usage.Windows.Rolling.Percent != 4 || usage.Windows.Weekly.Percent != 46 || usage.Windows.Monthly.Percent != 23 {
-				t.Errorf("windows percents = %v/%v/%v, want 4/46/23",
-					usage.Windows.Rolling.Percent, usage.Windows.Weekly.Percent, usage.Windows.Monthly.Percent)
+			if len(usage.Keys) != 1 || !usage.Keys[0].OK {
+				t.Fatalf("expected exactly one successful key, got %+v", usage.Keys)
 			}
-			if usage.Windows.Weekly.ResetInSeconds <= 0 {
-				t.Errorf("weekly reset_in_seconds = %d, want > 0", usage.Windows.Weekly.ResetInSeconds)
+			if usage.Keys[0].Windows == nil {
+				t.Fatal("keys[0].windows = nil, want non-nil on success")
+			}
+			if usage.Keys[0].Windows.Rolling.Percent != 4 || usage.Keys[0].Windows.Weekly.Percent != 46 || usage.Keys[0].Windows.Monthly.Percent != 23 {
+				t.Errorf("windows percents = %v/%v/%v, want 4/46/23",
+					usage.Keys[0].Windows.Rolling.Percent, usage.Keys[0].Windows.Weekly.Percent, usage.Keys[0].Windows.Monthly.Percent)
+			}
+			if usage.Keys[0].Windows.Weekly.ResetInSeconds <= 0 {
+				t.Errorf("weekly reset_in_seconds = %d, want > 0", usage.Keys[0].Windows.Weekly.ResetInSeconds)
+			}
+			// The raw key from the POST body must never appear in the response.
+			if strings.Contains(string(resp.Body), "sk-opencode-override") && tc.method == http.MethodPost {
+				t.Errorf("response leaks the raw override key: %s", string(resp.Body))
 			}
 		})
 	}
@@ -252,6 +266,175 @@ func TestHandleManagement_OpencodeUsageRoute(t *testing.T) {
 	}
 }
 
+// /opencode/usage status matrix (v0.4.0): >=1 key success → 200; one success
+// + one 401 → 200 with keys[1].ok=false and no windows; all 401 → 502; no
+// keys configured → 400 with the "no opencode api keys configured" prefix.
+func TestHandleManagement_OpencodeUsage_MultiKeyMatrix(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.Header.Get("Authorization") {
+		case "Bearer sk-good-AAAA", "Bearer sk-good-ZZZZ":
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(mockOpencodeUsageJSON))
+		default:
+			w.WriteHeader(http.StatusUnauthorized)
+			_, _ = w.Write([]byte(`{"error":"invalid api key"}`))
+		}
+	}))
+	defer ts.Close()
+
+	SetHostCaller(nil)
+	SetDefaultHTTPClient(ts.Client())
+	defer func() {
+		SetDefaultHTTPClient(&http.Client{Timeout: 15 * time.Second})
+	}()
+
+	postKeys := func(keys ...string) ManagementRequest {
+		body, _ := json.Marshal(map[string]any{
+			"opencode_api_keys": keys,
+			"opencode_api_base": ts.URL,
+		})
+		return ManagementRequest{
+			Method: http.MethodPost,
+			Path:   "/plugins/commandcode/opencode/usage",
+			Body:   body,
+		}
+	}
+
+	t.Run("both keys succeed → 200", func(t *testing.T) {
+		resp, err := HandleManagement(context.Background(), postKeys("sk-good-AAAA", "sk-good-ZZZZ"), nil)
+		if err != nil {
+			t.Fatalf("HandleManagement error: %v", err)
+		}
+		if resp.StatusCode != http.StatusOK {
+			t.Fatalf("StatusCode = %d, want 200, body=%s", resp.StatusCode, string(resp.Body))
+		}
+		var usage OpenCodeMultiKeyResponse
+		if err := json.Unmarshal(resp.Body, &usage); err != nil {
+			t.Fatalf("unmarshal error: %v", err)
+		}
+		if !usage.OK || len(usage.Keys) != 2 || !usage.Keys[0].OK || !usage.Keys[1].OK {
+			t.Errorf("unexpected response: %+v", usage)
+		}
+		if usage.Error != "" {
+			t.Errorf("top-level error = %q, want empty when keys are configured", usage.Error)
+		}
+	})
+
+	t.Run("one success one 401 → 200 with failed key isolated", func(t *testing.T) {
+		resp, err := HandleManagement(context.Background(), postKeys("sk-good-AAAA", "sk-bad-BBBB"), nil)
+		if err != nil {
+			t.Fatalf("HandleManagement error: %v", err)
+		}
+		if resp.StatusCode != http.StatusOK {
+			t.Fatalf("StatusCode = %d, want 200 (>=1 key succeeded), body=%s", resp.StatusCode, string(resp.Body))
+		}
+		var usage OpenCodeMultiKeyResponse
+		if err := json.Unmarshal(resp.Body, &usage); err != nil {
+			t.Fatalf("unmarshal error: %v", err)
+		}
+		if !usage.OK || len(usage.Keys) != 2 {
+			t.Fatalf("unexpected response: %+v", usage)
+		}
+		if !usage.Keys[0].OK || usage.Keys[0].Windows == nil {
+			t.Errorf("keys[0] = %+v, want ok with windows", usage.Keys[0])
+		}
+		if usage.Keys[1].OK || usage.Keys[1].Windows != nil {
+			t.Errorf("keys[1] = %+v, want not-ok with nil windows", usage.Keys[1])
+		}
+		if usage.Keys[1].StatusCode != http.StatusUnauthorized {
+			t.Errorf("keys[1].status_code = %d, want 401", usage.Keys[1].StatusCode)
+		}
+		// windows must be omitted from the JSON for the failed key, not
+		// serialized as null or a zero-value struct.
+		var raw struct {
+			Keys []struct {
+				Windows json.RawMessage `json:"windows"`
+			} `json:"keys"`
+		}
+		if err := json.Unmarshal(resp.Body, &raw); err != nil {
+			t.Fatalf("unmarshal raw error: %v", err)
+		}
+		if len(raw.Keys[1].Windows) != 0 {
+			t.Errorf("keys[1].windows in JSON = %s, want omitted", string(raw.Keys[1].Windows))
+		}
+		if !strings.Contains(usage.Keys[1].Error, "opencode upstream returned 401") {
+			t.Errorf("keys[1].error = %q, want upstream 401 mention", usage.Keys[1].Error)
+		}
+		if strings.Contains(string(resp.Body), "sk-bad-BBBB") {
+			t.Errorf("response leaks the raw key: %s", string(resp.Body))
+		}
+	})
+
+	t.Run("all keys 401 → 502", func(t *testing.T) {
+		resp, err := HandleManagement(context.Background(), postKeys("sk-bad-CCCC", "sk-bad-DDDD"), nil)
+		if err != nil {
+			t.Fatalf("HandleManagement error: %v", err)
+		}
+		if resp.StatusCode != http.StatusBadGateway {
+			t.Fatalf("StatusCode = %d, want 502 (all keys upstream-failed), body=%s", resp.StatusCode, string(resp.Body))
+		}
+		var usage OpenCodeMultiKeyResponse
+		if err := json.Unmarshal(resp.Body, &usage); err != nil {
+			t.Fatalf("unmarshal error: %v", err)
+		}
+		if usage.OK {
+			t.Errorf("OK = true, want false when all keys fail")
+		}
+		if usage.Error != "" {
+			t.Errorf("top-level error = %q, want empty (per-key errors carry the detail)", usage.Error)
+		}
+	})
+
+	t.Run("no keys configured → 400", func(t *testing.T) {
+		req := ManagementRequest{
+			Method: http.MethodGet,
+			Path:   "/v0/management/plugins/commandcode/opencode/usage",
+		}
+		resp, err := HandleManagement(context.Background(), req, &PluginConfig{})
+		if err != nil {
+			t.Fatalf("HandleManagement error: %v", err)
+		}
+		if resp.StatusCode != http.StatusBadRequest {
+			t.Fatalf("StatusCode = %d, want 400, body=%s", resp.StatusCode, string(resp.Body))
+		}
+		var usage OpenCodeMultiKeyResponse
+		if err := json.Unmarshal(resp.Body, &usage); err != nil {
+			t.Fatalf("unmarshal error: %v", err)
+		}
+		if !strings.HasPrefix(usage.Error, "no opencode api keys configured") {
+			t.Errorf("top-level error = %q, want prefix 'no opencode api keys configured'", usage.Error)
+		}
+	})
+
+	t.Run("POST body opencode_api_keys overrides config and wins over scalar", func(t *testing.T) {
+		body, _ := json.Marshal(map[string]any{
+			"opencode_api_key":  "sk-scalar-must-lose",
+			"opencode_api_keys": []string{"sk-good-AAAA"},
+			"opencode_api_base": ts.URL,
+		})
+		req := ManagementRequest{
+			Method: http.MethodPost,
+			Path:   "/plugins/commandcode/opencode/usage",
+			Body:   body,
+		}
+		cfg := &PluginConfig{OpenCodeAPIKey: "sk-config-must-lose", OpenCodeAPIBase: ts.URL}
+		resp, err := HandleManagement(context.Background(), req, cfg)
+		if err != nil {
+			t.Fatalf("HandleManagement error: %v", err)
+		}
+		if resp.StatusCode != http.StatusOK {
+			t.Fatalf("StatusCode = %d, want 200, body=%s", resp.StatusCode, string(resp.Body))
+		}
+		var usage OpenCodeMultiKeyResponse
+		if err := json.Unmarshal(resp.Body, &usage); err != nil {
+			t.Fatalf("unmarshal error: %v", err)
+		}
+		if len(usage.Keys) != 1 || usage.Keys[0].KeyID != MaskAPIKey("sk-good-AAAA") {
+			t.Errorf("keys = %+v, want only the body-list key (list wins over scalar and config)", usage.Keys)
+		}
+	})
+}
+
 // Regression: /plugins/commandcode/all must not be swallowed by the generic
 // "/usage" suffix match nor miss its dedicated handler.
 func TestHandleManagement_AllRoute_BothProvidersOK(t *testing.T) {
@@ -314,10 +497,14 @@ func TestHandleManagement_AllRoute_BothProvidersOK(t *testing.T) {
 	if err := json.Unmarshal(all.CommandCode, &ccUsage); err != nil || !ccUsage.OK {
 		t.Errorf("commandcode payload invalid: err=%v usage=%+v", err, ccUsage)
 	}
-	var ocUsage OpenCodeFormattedUsageResponse
+	// v0.4.0: the opencode field carries the multi-key envelope.
+	var ocUsage OpenCodeMultiKeyResponse
 	if err := json.Unmarshal(all.OpenCode, &ocUsage); err != nil || !ocUsage.OK {
 		t.Errorf("opencode payload invalid: err=%v usage=%+v", err, ocUsage)
 	}
+	if len(ocUsage.Keys) != 1 || !ocUsage.Keys[0].OK || ocUsage.Keys[0].Windows == nil {
+		t.Errorf("opencode keys = %+v, want one successful key with windows", ocUsage.Keys)
+	}
 }
 
 // Partial failure: one provider fails upstream → ok stays true, the failed
@@ -377,8 +564,10 @@ func TestHandleManagement_AllUsage_PartialFailure(t *testing.T) {
 	if _, present := all.Errors["opencode"]; !present {
 		t.Errorf("expected errors[opencode] to be set, got %v", all.Errors)
 	}
-	if !strings.Contains(all.Errors["opencode"], "opencode upstream returned 500") {
-		t.Errorf("errors[opencode] = %q, want it to mention 'opencode upstream returned 500'", all.Errors["opencode"])
+	// v0.4.0: a configured-but-failed key is an upstream failure; with the
+	// single configured key failing, the aggregate message is "all N keys failed".
+	if !strings.Contains(all.Errors["opencode"], "all 1 opencode keys failed") {
+		t.Errorf("errors[opencode] = %q, want it to mention 'all 1 opencode keys failed'", all.Errors["opencode"])
 	}
 	// opencode field must be omitted (omitempty), not serialized as "null".
 	if strings.Contains(string(resp.Body), `"opencode":null`) {
@@ -450,6 +639,154 @@ func TestHandleManagement_AllUsage_Upstream400NotMisclassified(t *testing.T) {
 	}
 }
 
+// /all matrix (v0.4.0): Command Code upstream down + all opencode keys 401
+// → every failure is upstream → 502, with the aggregate "all N keys failed"
+// message in errors["opencode"].
+func TestHandleManagement_AllUsage_CCUpstreamDown_OpenCodeAll401(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/usage":
+			w.WriteHeader(http.StatusUnauthorized)
+			_, _ = w.Write([]byte(`{"error":"invalid api key"}`))
+		default: // commandcode internal endpoints
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte(`{"error":"cc exploded"}`))
+		}
+	}))
+	defer ts.Close()
+
+	SetHostCaller(nil)
+	SetDefaultHTTPClient(ts.Client())
+	defer func() {
+		SetDefaultHTTPClient(&http.Client{Timeout: 15 * time.Second})
+	}()
+
+	cfg := &PluginConfig{
+		SessionToken:    "configured-token",
+		APIBase:         ts.URL,
+		OpenCodeAPIKeys: []string{"sk-bad-AAAA", "sk-bad-BBBB"},
+		OpenCodeAPIBase: ts.URL,
+	}
+
+	req := ManagementRequest{
+		Method: http.MethodGet,
+		Path:   "/v0/management/plugins/commandcode/all",
+	}
+	resp, err := HandleManagement(context.Background(), req, cfg)
+	if err != nil {
+		t.Fatalf("HandleManagement error: %v", err)
+	}
+	if resp.StatusCode != http.StatusBadGateway {
+		t.Fatalf("StatusCode = %d, want 502 (all failures upstream), body=%s", resp.StatusCode, string(resp.Body))
+	}
+
+	var all AllUsageResponse
+	if err := json.Unmarshal(resp.Body, &all); err != nil {
+		t.Fatalf("unmarshal body error: %v", err)
+	}
+	if all.OK {
+		t.Error("expected ok=false")
+	}
+	if !strings.Contains(all.Errors["opencode"], "all 2 opencode keys failed") {
+		t.Errorf("errors[opencode] = %q, want 'all 2 opencode keys failed'", all.Errors["opencode"])
+	}
+}
+
+// /all matrix: Command Code upstream down + one opencode key succeeds → 200
+// (partial failure); the multi-key opencode payload is inlined.
+func TestHandleManagement_AllUsage_CCUpstreamDown_OpenCodeOneOK(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.URL.Path == "/usage" && r.Header.Get("Authorization") == "Bearer sk-good-AAAA":
+			_, _ = w.Write([]byte(mockOpencodeUsageJSON))
+		case r.URL.Path == "/usage":
+			w.WriteHeader(http.StatusUnauthorized)
+			_, _ = w.Write([]byte(`{"error":"invalid api key"}`))
+		default: // commandcode internal endpoints
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte(`{"error":"cc exploded"}`))
+		}
+	}))
+	defer ts.Close()
+
+	SetHostCaller(nil)
+	SetDefaultHTTPClient(ts.Client())
+	defer func() {
+		SetDefaultHTTPClient(&http.Client{Timeout: 15 * time.Second})
+	}()
+
+	cfg := &PluginConfig{
+		SessionToken:    "configured-token",
+		APIBase:         ts.URL,
+		OpenCodeAPIKeys: []string{"sk-good-AAAA", "sk-bad-BBBB"},
+		OpenCodeAPIBase: ts.URL,
+	}
+
+	req := ManagementRequest{
+		Method: http.MethodGet,
+		Path:   "/v0/management/plugins/commandcode/all",
+	}
+	resp, err := HandleManagement(context.Background(), req, cfg)
+	if err != nil {
+		t.Fatalf("HandleManagement error: %v", err)
+	}
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("StatusCode = %d, want 200 (opencode partial success), body=%s", resp.StatusCode, string(resp.Body))
+	}
+
+	var all AllUsageResponse
+	if err := json.Unmarshal(resp.Body, &all); err != nil {
+		t.Fatalf("unmarshal body error: %v", err)
+	}
+	if !all.OK {
+		t.Error("expected ok=true (>=1 provider succeeded)")
+	}
+	if _, present := all.Errors["commandcode"]; !present {
+		t.Errorf("expected errors[commandcode], got %v", all.Errors)
+	}
+	if _, present := all.Errors["opencode"]; present {
+		t.Errorf("errors[opencode] must be absent on partial success, got %q", all.Errors["opencode"])
+	}
+	var oc OpenCodeMultiKeyResponse
+	if err := json.Unmarshal(all.OpenCode, &oc); err != nil || !oc.OK {
+		t.Fatalf("opencode payload invalid: err=%v oc=%+v", err, oc)
+	}
+	if len(oc.Keys) != 2 || !oc.Keys[0].OK || oc.Keys[1].OK {
+		t.Errorf("opencode keys = %+v, want [ok, failed]", oc.Keys)
+	}
+	if strings.Contains(string(resp.Body), "sk-good-AAAA") || strings.Contains(string(resp.Body), "sk-bad-BBBB") {
+		t.Errorf("/all response leaks a raw opencode key: %s", string(resp.Body))
+	}
+}
+
+func TestIsLocalCredentialError(t *testing.T) {
+	local := []string{
+		"session_token is required. Configure ...",
+		"opencode_api_key is required. Configure ...",
+		// v0.4.0 prefix: zero opencode keys configured is a local problem.
+		"no opencode api keys configured. Configure opencode_api_keys (YAML list) ...",
+	}
+	for _, msg := range local {
+		if !isLocalCredentialError(msg) {
+			t.Errorf("isLocalCredentialError(%q) = false, want true", msg)
+		}
+	}
+
+	upstream := []string{
+		"opencode upstream returned 401: check opencode_api_key",
+		"opencode upstream request failed: dial tcp: connection refused",
+		"all 2 opencode keys failed",
+		"upstream returned non-200 status",
+		"failed to parse opencode upstream usage: unexpected end of JSON input",
+		"",
+	}
+	for _, msg := range upstream {
+		if isLocalCredentialError(msg) {
+			t.Errorf("isLocalCredentialError(%q) = true, want false", msg)
+		}
+	}
+}
+
 // Unknown path after the new routes still 404s.
 func TestHandleManagement_UnknownPath(t *testing.T) {
 	req := ManagementRequest{
diff --git a/plugin/plugin.go b/plugin/plugin.go
index 8e22d39..d16f225 100644
--- a/plugin/plugin.go
+++ b/plugin/plugin.go
@@ -13,7 +13,7 @@ import (
 const (
 	PluginID       = "commandcode"
 	PluginName     = "commandcode"
-	PluginVersion  = "0.3.0"
+	PluginVersion  = "0.4.0"
 	PluginAuthor   = "zgs225"
 	PluginRepo     = "https://github.com/zgs225/cliproxy-plugin-commandcode"
 	PluginLogo     = "https://raw.githubusercontent.com/zgs225/cliproxy-plugin-commandcode/main/assets/logo.svg"
@@ -23,10 +23,11 @@ const (
 // PluginConfig holds the runtime configuration parsed from YAML.
 type PluginConfig struct {
 	mu              sync.RWMutex
-	SessionToken    string `yaml:"session_token" json:"session_token"`
-	APIBase         string `yaml:"api_base" json:"api_base"`
-	OpenCodeAPIKey  string `yaml:"opencode_api_key" json:"opencode_api_key"`
-	OpenCodeAPIBase string `yaml:"opencode_api_base" json:"opencode_api_base"`
+	SessionToken    string   `yaml:"session_token" json:"session_token"`
+	APIBase         string   `yaml:"api_base" json:"api_base"`
+	OpenCodeAPIKey  string   `yaml:"opencode_api_key" json:"opencode_api_key"`
+	OpenCodeAPIKeys []string `yaml:"opencode_api_keys" json:"opencode_api_keys"`
+	OpenCodeAPIBase string   `yaml:"opencode_api_base" json:"opencode_api_base"`
 }
 
 // UpdateFromYAML updates the configuration from raw YAML bytes.
@@ -35,10 +36,11 @@ func (c *PluginConfig) UpdateFromYAML(raw []byte) error {
 		return nil
 	}
 	var tmp struct {
-		SessionToken    string `yaml:"session_token"`
-		APIBase         string `yaml:"api_base"`
-		OpenCodeAPIKey  string `yaml:"opencode_api_key"`
-		OpenCodeAPIBase string `yaml:"opencode_api_base"`
+		SessionToken    string   `yaml:"session_token"`
+		APIBase         string   `yaml:"api_base"`
+		OpenCodeAPIKey  string   `yaml:"opencode_api_key"`
+		OpenCodeAPIKeys []string `yaml:"opencode_api_keys"`
+		OpenCodeAPIBase string   `yaml:"opencode_api_base"`
 	}
 	if err := yaml.Unmarshal(raw, &tmp); err != nil {
 		return fmt.Errorf("unmarshal config_yaml: %w", err)
@@ -58,6 +60,15 @@ func (c *PluginConfig) UpdateFromYAML(raw []byte) error {
 		// ExtractSessionToken (that is Command Code cookie specific).
 		c.OpenCodeAPIKey = strings.TrimSpace(tmp.OpenCodeAPIKey)
 	}
+	// Merge rule: opencode_api_keys (YAML list) wins when non-empty after
+	// trimming/dedup; otherwise opencode_api_key (scalar) degrades to a
+	// single-key list; both empty means no keys.
+	c.OpenCodeAPIKeys = normalizeOpenCodeKeys(tmp.OpenCodeAPIKeys)
+	if len(c.OpenCodeAPIKeys) == 0 {
+		if single := strings.TrimSpace(tmp.OpenCodeAPIKey); single != "" {
+			c.OpenCodeAPIKeys = []string{single}
+		}
+	}
 	if tmp.OpenCodeAPIBase != "" {
 		c.OpenCodeAPIBase = strings.TrimRight(tmp.OpenCodeAPIBase, "/")
 	}
@@ -91,13 +102,48 @@ func (c *PluginConfig) GetAPIBase() string {
 	return c.APIBase
 }
 
-// GetOpenCodeAPIKey safely returns the OpenCode Go API key.
+// GetOpenCodeAPIKey safely returns the single configured OpenCode Go API key
+// (scalar opencode_api_key field; kept for backward compatibility).
 func (c *PluginConfig) GetOpenCodeAPIKey() string {
 	c.mu.RLock()
 	defer c.mu.RUnlock()
 	return c.OpenCodeAPIKey
 }
 
+// GetOpenCodeAPIKeys safely returns the configured OpenCode Go API keys.
+// The list field wins; when it is empty the scalar OpenCodeAPIKey degrades
+// to a single-key list (same merge rule as UpdateFromYAML). The returned
+// slice is a copy; callers may not mutate it.
+func (c *PluginConfig) GetOpenCodeAPIKeys() []string {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	if len(c.OpenCodeAPIKeys) > 0 {
+		out := make([]string, len(c.OpenCodeAPIKeys))
+		copy(out, c.OpenCodeAPIKeys)
+		return out
+	}
+	if c.OpenCodeAPIKey != "" {
+		return []string{c.OpenCodeAPIKey}
+	}
+	return nil
+}
+
+// normalizeOpenCodeKeys trims each key, drops empties and dedups while
+// preserving the original order.
+func normalizeOpenCodeKeys(keys []string) []string {
+	out := make([]string, 0, len(keys))
+	seen := make(map[string]bool, len(keys))
+	for _, k := range keys {
+		k = strings.TrimSpace(k)
+		if k == "" || seen[k] {
+			continue
+		}
+		seen[k] = true
+		out = append(out, k)
+	}
+	return out
+}
+
 // GetOpenCodeAPIBase safely returns the OpenCode Go API base URL,
 // falling back to DefaultOpenCodeAPIBase when unset.
 func (c *PluginConfig) GetOpenCodeAPIBase() string {
@@ -181,7 +227,12 @@ func (p *Plugin) handleRegister(raw []byte) ([]byte, error) {
 				{
 					Name:        "opencode_api_key",
 					Type:        "string",
-					Description: "OpenCode Go API key (Bearer token used for https://opencode.ai/zen/go/v1/usage)",
+					Description: "OpenCode Go API key (single Bearer token; degraded path when opencode_api_keys is unset)",
+				},
+				{
+					Name:        "opencode_api_keys",
+					Type:        "string",
+					Description: "OpenCode Go API keys as a YAML list (e.g. opencode_api_keys: [\"sk-KEY1\", \"sk-KEY2\"]); takes precedence over opencode_api_key",
 				},
 				{
 					Name:        "opencode_api_base",
diff --git a/plugin/plugin_test.go b/plugin/plugin_test.go
index efe8af2..b78d92b 100644
--- a/plugin/plugin_test.go
+++ b/plugin/plugin_test.go
@@ -46,15 +46,15 @@ api_base: "https://custom-api.commandcode.ai"
 		t.Errorf("Capabilities.ManagementAPI = false, want true")
 	}
 
-	// Verify config fields
-	if len(reg.Metadata.ConfigFields) != 4 {
-		t.Fatalf("ConfigFields len = %d, want 4", len(reg.Metadata.ConfigFields))
+	// Verify config fields (v0.4.0: 4 → 5, adds opencode_api_keys)
+	if len(reg.Metadata.ConfigFields) != 5 {
+		t.Fatalf("ConfigFields len = %d, want 5", len(reg.Metadata.ConfigFields))
 	}
 	fieldNames := map[string]bool{}
 	for _, f := range reg.Metadata.ConfigFields {
 		fieldNames[f.Name] = true
 	}
-	if !fieldNames["session_token"] || !fieldNames["api_base"] || !fieldNames["opencode_api_key"] || !fieldNames["opencode_api_base"] {
+	if !fieldNames["session_token"] || !fieldNames["api_base"] || !fieldNames["opencode_api_key"] || !fieldNames["opencode_api_keys"] || !fieldNames["opencode_api_base"] {
 		t.Errorf("ConfigFields missing expected fields: %+v", reg.Metadata.ConfigFields)
 	}
 
@@ -169,4 +169,90 @@ func TestPluginConfig_OpenCode(t *testing.T) {
 	if got := empty.config.GetOpenCodeAPIKey(); got != "" {
 		t.Errorf("default OpenCodeAPIKey = %q, want empty", got)
 	}
+	if got := empty.config.GetOpenCodeAPIKeys(); len(got) != 0 {
+		t.Errorf("default GetOpenCodeAPIKeys = %v, want empty", got)
+	}
+}
+
+func TestPluginConfig_OpenCodeAPIKeys(t *testing.T) {
+	newCfg := func(t *testing.T, yaml string) *PluginConfig {
+		t.Helper()
+		cfg := &PluginConfig{}
+		if err := cfg.UpdateFromYAML([]byte(yaml)); err != nil {
+			t.Fatalf("UpdateFromYAML error: %v", err)
+		}
+		return cfg
+	}
+
+	t.Run("list takes precedence over scalar", func(t *testing.T) {
+		cfg := newCfg(t, `
+opencode_api_key: "sk-scalar"
+opencode_api_keys:
+  - " sk-key1 "
+  - "sk-key2"
+`)
+		got := cfg.GetOpenCodeAPIKeys()
+		if len(got) != 2 || got[0] != "sk-key1" || got[1] != "sk-key2" {
+			t.Errorf("GetOpenCodeAPIKeys = %v, want [sk-key1 sk-key2] (list wins, trimmed)", got)
+		}
+		if cfg.GetOpenCodeAPIKey() != "sk-scalar" {
+			t.Errorf("GetOpenCodeAPIKey = %q, want sk-scalar (scalar field kept)", cfg.GetOpenCodeAPIKey())
+		}
+	})
+
+	t.Run("scalar degrades to single-key list", func(t *testing.T) {
+		cfg := newCfg(t, `
+opencode_api_key: " sk-only "
+`)
+		got := cfg.GetOpenCodeAPIKeys()
+		if len(got) != 1 || got[0] != "sk-only" {
+			t.Errorf("GetOpenCodeAPIKeys = %v, want [sk-only]", got)
+		}
+	})
+
+	t.Run("dedup preserve order and drop empties", func(t *testing.T) {
+		cfg := newCfg(t, `
+opencode_api_keys:
+  - "sk-b"
+  - ""
+  - "  "
+  - "sk-a"
+  - "sk-b"
+  - "sk-c"
+  - "sk-a"
+`)
+		got := cfg.GetOpenCodeAPIKeys()
+		want := []string{"sk-b", "sk-a", "sk-c"}
+		if len(got) != len(want) {
+			t.Fatalf("GetOpenCodeAPIKeys = %v, want %v", got, want)
+		}
+		for i := range want {
+			if got[i] != want[i] {
+				t.Errorf("GetOpenCodeAPIKeys[%d] = %q, want %q (order preserved, deduped)", i, got[i], want[i])
+			}
+		}
+	})
+
+	t.Run("all empty yields no keys", func(t *testing.T) {
+		for _, yaml := range []string{
+			`opencode_api_key: ""`,
+			"opencode_api_keys: []\nopencode_api_key: \"   \"",
+			"opencode_api_keys:\n  - \"\"\n  - \"   \"",
+		} {
+			cfg := newCfg(t, yaml)
+			if got := cfg.GetOpenCodeAPIKeys(); len(got) != 0 {
+				t.Errorf("yaml %q: GetOpenCodeAPIKeys = %v, want empty", yaml, got)
+			}
+		}
+	})
+
+	t.Run("getter returns a copy", func(t *testing.T) {
+		cfg := newCfg(t, "opencode_api_keys:\n  - sk-a\n  - sk-b\n")
+		got := cfg.GetOpenCodeAPIKeys()
+		got[0] = "mutated"
+		again := cfg.GetOpenCodeAPIKeys()
+		if again[0] != "sk-a" {
+			t.Errorf("GetOpenCodeAPIKeys not a copy: after mutation got %q", again[0])
+		}
+	})
 }
diff --git a/plugin/quota_page.go b/plugin/quota_page.go
index 9f0214a..c8a3f48 100644
--- a/plugin/quota_page.go
+++ b/plugin/quota_page.go
@@ -10,7 +10,7 @@ const QuotaPageHTML = `<!DOCTYPE html>
 <head>
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>用量配额 - Command Code + OpenCode Go - CLIProxyAPI</title>
+  <title>用量配额 - CLIProxyAPI</title>
   <style>
     :root {
       --bg-page: #f8fafc;
@@ -217,11 +217,6 @@ const QuotaPageHTML = `<!DOCTYPE html>
       }
     }
 
-    .brand-subtitle {
-      font-size: 13px;
-      color: var(--text-muted);
-    }
-
     .action-group {
       display: flex;
       align-items: center;
@@ -666,12 +661,110 @@ const QuotaPageHTML = `<!DOCTYPE html>
       display: block;
     }
 
-    /* OpenCode card status chip (reuses .status-badge variants) */
-    .oc-status-wrap {
+    /* Command Code tab head: title + plan badge (planBadge moved out of header) */
+    .cc-tab-head {
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+      margin-bottom: 16px;
+      gap: 10px;
+    }
+
+    .cc-tab-title {
+      font-size: 15px;
+      font-weight: 700;
+      color: var(--text-main);
+    }
+
+    /* OpenCode multi-key groups: one group per key, 3 compact window rows each */
+    .oc-key-group {
+      background: var(--bg-card);
+      border: 1px solid var(--border-color);
+      border-radius: var(--radius-lg);
+      padding: 20px;
+      box-shadow: var(--shadow-sm);
       display: flex;
       flex-direction: column;
-      align-items: flex-end;
-      gap: 6px;
+      gap: 12px;
+      margin-bottom: 16px;
+    }
+
+    .oc-key-head {
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+      gap: 10px;
+    }
+
+    .oc-key-id {
+      font-size: 13px;
+      font-family: monospace;
+      color: var(--text-muted);
+    }
+
+    .oc-key-body {
+      display: flex;
+      flex-direction: column;
+      gap: 10px;
+    }
+
+    .oc-win-row {
+      display: grid;
+      grid-template-columns: 92px 1fr 52px 84px;
+      align-items: center;
+      gap: 12px;
+    }
+
+    @media (max-width: 640px) {
+      .oc-win-row {
+        grid-template-columns: 86px 1fr 48px;
+      }
+      .oc-win-reset {
+        display: none;
+      }
+    }
+
+    .oc-win-name {
+      font-size: 12px;
+      font-weight: 600;
+      color: var(--text-muted);
+      white-space: nowrap;
+    }
+
+    /* .progress-track combo class: 8px mini bar, same as .all-grid */
+    .oc-win-bar {
+      height: 8px;
+    }
+
+    .oc-win-pct {
+      font-size: 13px;
+      font-weight: 700;
+      color: var(--text-main);
+      white-space: nowrap;
+      font-feature-settings: "tnum";
+    }
+
+    .oc-win-pct.warn { color: var(--warning); }
+    .oc-win-pct.bad { color: var(--danger); }
+
+    /* .countdown-timer combo class: smaller reset countdown */
+    .oc-win-reset {
+      font-size: 12px;
+    }
+
+    .oc-key-error {
+      font-size: 12px;
+      color: var(--danger);
+      word-break: break-all;
+    }
+
+    .all-key-id {
+      font-family: monospace;
+      font-size: 12px;
+    }
+
+    textarea.form-control {
+      resize: vertical;
     }
 
     /* All tab: two provider cards side by side */
@@ -813,11 +906,9 @@ const QuotaPageHTML = `<!DOCTYPE html>
         </div>
         <div>
           <div class="brand-title">
-            用量配额 - Command Code + OpenCode Go
-            <span class="version-tag">v0.3.0</span>
-            <span id="planBadge" class="plan-tag" style="display:none;">Plan: -</span>
+            用量配额
+            <span class="version-tag">v0.4.0</span>
           </div>
-          <div class="brand-subtitle">CLIProxyAPI 实时限额与用量监控 (Command Code + OpenCode Go)</div>
         </div>
       </div>
 
@@ -874,9 +965,9 @@ const QuotaPageHTML = `<!DOCTYPE html>
           <input type="password" id="inputSessionToken" class="form-control" placeholder="覆盖测试: __Secure-commandcode_prod_.session_token" />
         </div>
         <div class="form-group">
-          <label for="inputOpenCodeKey">OpenCode Go API Key (测试覆盖)</label>
-          <input type="password" id="inputOpenCodeKey" class="form-control" placeholder="覆盖测试: sk-..." />
-          <span class="form-hint">仅测试覆盖用：值不持久化，仅当次请求生效</span>
+          <label for="inputOpenCodeKeys">OpenCode Go API Keys (测试覆盖)</label>
+          <textarea id="inputOpenCodeKeys" class="form-control" rows="3" placeholder="每行一个 sk-..."></textarea>
+          <span class="form-hint">每行一个 key；仅当次请求生效，不持久化</span>
         </div>
       </div>
       <div style="margin-top: 14px; display: flex; justify-content: flex-end; gap: 10px;">
@@ -895,6 +986,10 @@ const QuotaPageHTML = `<!DOCTYPE html>
       </div>
 
       <div id="ccContent">
+        <div class="cc-tab-head">
+          <span class="cc-tab-title">Command Code</span>
+          <span id="planBadge" class="plan-tag" style="display:none;">Plan: -</span>
+        </div>
 
     <!-- Overview Metrics -->
     <div class="metrics-grid">
@@ -1035,87 +1130,7 @@ const QuotaPageHTML = `<!DOCTYPE html>
         </div>
         <div id="ocErrorMsg" class="error-card-msg">-</div>
       </div>
-      <div id="ocContent">
-        <div class="metrics-grid">
-          <!-- Rolling 5h Window -->
-          <div id="ocCardRolling" class="quota-card">
-            <div class="quota-card-header">
-              <div>
-                <span class="quota-tag">短期滑动窗口</span>
-                <div class="quota-name">Rolling 5h (5 小时窗口)</div>
-              </div>
-              <div class="oc-status-wrap">
-                <span id="ocStatusRolling" class="status-badge online"><span class="status-dot"></span><span id="ocStatusTextRolling">-</span></span>
-                <div id="ocBadgeRolling" class="quota-percent-badge">- %</div>
-              </div>
-            </div>
-
-            <div class="progress-track">
-              <div id="ocBarRolling" class="progress-bar"></div>
-            </div>
-
-            <div class="reset-box">
-              <div class="reset-label">
-                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"></circle><polyline points="12 6 12 12 16 14"></polyline></svg>
-                <span>重置倒计时</span>
-              </div>
-              <div id="ocTimerRolling" class="countdown-timer">-</div>
-            </div>
-          </div>
-
-          <!-- Weekly Window -->
-          <div id="ocCardWeekly" class="quota-card">
-            <div class="quota-card-header">
-              <div>
-                <span class="quota-tag" style="color:#8b5cf6; background:rgba(139,92,246,0.12)">周度窗口</span>
-                <div class="quota-name">Weekly (每周限制)</div>
-              </div>
-              <div class="oc-status-wrap">
-                <span id="ocStatusWeekly" class="status-badge online"><span class="status-dot"></span><span id="ocStatusTextWeekly">-</span></span>
-                <div id="ocBadgeWeekly" class="quota-percent-badge">- %</div>
-              </div>
-            </div>
-
-            <div class="progress-track">
-              <div id="ocBarWeekly" class="progress-bar"></div>
-            </div>
-
-            <div class="reset-box">
-              <div class="reset-label">
-                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"></circle><polyline points="12 6 12 12 16 14"></polyline></svg>
-                <span>重置倒计时</span>
-              </div>
-              <div id="ocTimerWeekly" class="countdown-timer">-</div>
-            </div>
-          </div>
-
-          <!-- Monthly Window -->
-          <div id="ocCardMonthly" class="quota-card">
-            <div class="quota-card-header">
-              <div>
-                <span class="quota-tag" style="color:#f59e0b; background:rgba(245,158,11,0.12)">月度窗口</span>
-                <div class="quota-name">Monthly (月度窗口)</div>
-              </div>
-              <div class="oc-status-wrap">
-                <span id="ocStatusMonthly" class="status-badge online"><span class="status-dot"></span><span id="ocStatusTextMonthly">-</span></span>
-                <div id="ocBadgeMonthly" class="quota-percent-badge">- %</div>
-              </div>
-            </div>
-
-            <div class="progress-track">
-              <div id="ocBarMonthly" class="progress-bar"></div>
-            </div>
-
-            <div class="reset-box">
-              <div class="reset-label">
-                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"></circle><polyline points="12 6 12 12 16 14"></polyline></svg>
-                <span>重置倒计时</span>
-              </div>
-              <div id="ocTimerMonthly" class="countdown-timer">-</div>
-            </div>
-          </div>
-        </div>
-      </div>
+      <div id="ocContent"></div>
     </div>
     <!-- /Tab: OpenCode Go -->
 
@@ -1163,7 +1178,7 @@ const QuotaPageHTML = `<!DOCTYPE html>
       const settingsDrawer = document.getElementById("settingsDrawer");
       const inputMgmtKey = document.getElementById("inputMgmtKey");
       const inputSessionToken = document.getElementById("inputSessionToken");
-      const inputOpenCodeKey = document.getElementById("inputOpenCodeKey");
+      const inputOpenCodeKeys = document.getElementById("inputOpenCodeKeys");
       const alertBox = document.getElementById("alertBox");
       const alertMsg = document.getElementById("alertMsg");
       const statusBadge = document.getElementById("statusBadge");
@@ -1215,31 +1230,7 @@ const QuotaPageHTML = `<!DOCTYPE html>
       const timerWeekly = document.getElementById("timerWeekly");
       const lastUpdated = document.getElementById("lastUpdated");
 
-      // OpenCode Go card elements
-      const ocCardRolling = document.getElementById("ocCardRolling");
-      const ocBadgeRolling = document.getElementById("ocBadgeRolling");
-      const ocBarRolling = document.getElementById("ocBarRolling");
-      const ocTimerRolling = document.getElementById("ocTimerRolling");
-      const ocStatusRolling = document.getElementById("ocStatusRolling");
-      const ocStatusTextRolling = document.getElementById("ocStatusTextRolling");
-
-      const ocCardWeekly = document.getElementById("ocCardWeekly");
-      const ocBadgeWeekly = document.getElementById("ocBadgeWeekly");
-      const ocBarWeekly = document.getElementById("ocBarWeekly");
-      const ocTimerWeekly = document.getElementById("ocTimerWeekly");
-      const ocStatusWeekly = document.getElementById("ocStatusWeekly");
-      const ocStatusTextWeekly = document.getElementById("ocStatusTextWeekly");
-
-      const ocCardMonthly = document.getElementById("ocCardMonthly");
-      const ocBadgeMonthly = document.getElementById("ocBadgeMonthly");
-      const ocBarMonthly = document.getElementById("ocBarMonthly");
-      const ocTimerMonthly = document.getElementById("ocTimerMonthly");
-      const ocStatusMonthly = document.getElementById("ocStatusMonthly");
-      const ocStatusTextMonthly = document.getElementById("ocStatusTextMonthly");
-
-      const ocTimerEls = { rolling: ocTimerRolling, weekly: ocTimerWeekly, monthly: ocTimerMonthly };
-
-      let monthlyTargetTime = null;
+      const lastUpdated = document.getElementById("lastUpdated");
       let fiveHourTargetTime = null;
       let weeklyTargetTime = null;
       let timerInterval = null;
@@ -1250,7 +1241,8 @@ const QuotaPageHTML = `<!DOCTYPE html>
         opencode: { level: "unknown", err: null, data: null }
       };
       let activeTab = "commandcode";
-      let ocTargets = { rolling: null, weekly: null, monthly: null };
+      // Multi-key countdown targets: [{el, target}] across all keys x 3 windows
+      let ocTargets = [];
 
       function getStoredManagementKey() {
         if (inputMgmtKey.value.trim()) {
@@ -1404,9 +1396,10 @@ const QuotaPageHTML = `<!DOCTYPE html>
         if (weeklyTargetTime) {
           timerWeekly.textContent = formatCountdown(weeklyTargetTime);
         }
-        for (const key in ocTargets) {
-          if (ocTargets[key]) {
-            ocTimerEls[key].textContent = formatCountdown(ocTargets[key]);
+        for (let i = 0; i < ocTargets.length; i++) {
+          const t = ocTargets[i];
+          if (t && t.el) {
+            t.el.textContent = t.target ? formatCountdown(t.target) : "-";
           }
         }
       }
@@ -1505,45 +1498,96 @@ const QuotaPageHTML = `<!DOCTYPE html>
       function renderOpencode(data) {
         providerState.opencode.err = null;
         providerState.opencode.data = data;
+
+        // 多 key 契约：keys[] 为空/缺失视为 provider 级失败，走全局错误卡片
+        const keys = data && Array.isArray(data.keys) ? data.keys : [];
+        if (keys.length === 0) {
+          showProviderError("opencode", (data && data.error) || "OpenCode 未返回任何 key 数据");
+          return;
+        }
+
         ocContent.style.display = "";
         ocErrorCard.classList.remove("show");
+        ocTargets = [];
 
-        const windows = data.windows || {};
-        const defs = [
-          { key: "rolling", card: ocCardRolling, badge: ocBadgeRolling, bar: ocBarRolling, timer: ocTimerRolling, chip: ocStatusRolling, chipText: ocStatusTextRolling, w: windows.rolling },
-          { key: "weekly", card: ocCardWeekly, badge: ocBadgeWeekly, bar: ocBarWeekly, timer: ocTimerWeekly, chip: ocStatusWeekly, chipText: ocStatusTextWeekly, w: windows.weekly },
-          { key: "monthly", card: ocCardMonthly, badge: ocBadgeMonthly, bar: ocBarMonthly, timer: ocTimerMonthly, chip: ocStatusMonthly, chipText: ocStatusTextMonthly, w: windows.monthly }
+        const WIN_DEFS = [
+          { name: "Rolling 5h", key: "rolling" },
+          { name: "Weekly", key: "weekly" },
+          { name: "Monthly", key: "monthly" }
         ];
-
-        let worst = "online";
         const rank = { online: 0, warning: 1, exceeded: 2 };
+        // provider 级别 = 全部 key 最差（失败 key 按 exceeded 视觉计入）
+        let worst = "online";
+        let html = "";
 
-        defs.forEach(function (d) {
-          const w = d.w || {};
-          const pct = clampPercent(w.percent);
-          const level = levelOf(pct, w.exceeded, w.status);
-          if (rank[level] > rank[worst]) worst = level;
+        keys.forEach(function (k) {
+          const keyId = esc(k.key_id || "***");
+          if (k.ok && k.windows) {
+            const windows = k.windows;
+            let keyWorst = "online";
+            let rowsHtml = "";
 
-          d.badge.textContent = pct === null ? "- %" : pct.toFixed(1) + " %";
-          d.bar.style.width = (pct === null ? 0 : pct) + "%";
-          d.bar.className = "progress-bar" + (level === "exceeded" ? " danger" : level === "warning" ? " warning" : "");
-          d.card.className = "quota-card" + (level === "exceeded" ? " is-exceeded" : "");
-          d.chip.className = "status-badge " + level;
-          d.chipText.textContent = level === "exceeded" ? "超限" : level === "warning" ? "紧张" : "正常";
+            WIN_DEFS.forEach(function (def) {
+              const w = windows[def.key] || {};
+              const pct = clampPercent(w.percent);
+              const level = levelOf(pct, w.exceeded, w.status);
+              if (rank[level] > rank[keyWorst]) keyWorst = level;
+              if (rank[level] > rank[worst]) worst = level;
 
-          // reset_at 优先；缺失/不可解析时回退 reset_in_seconds；都没有则显示 "-"
-          let target = null;
-          if (w.reset_at) {
-            const t = new Date(w.reset_at);
-            if (!isNaN(t.getTime())) target = t;
+              // reset_at 优先；缺失/不可解析时回退 reset_in_seconds；皆无显示 "-"
+              let target = null;
+              if (w.reset_at) {
+                const t = new Date(w.reset_at);
+                if (!isNaN(t.getTime())) target = t;
+              }
+              if (!target && w.reset_in_seconds > 0) {
+                target = new Date(Date.now() + Number(w.reset_in_seconds) * 1000);
+              }
+
+              const pctText = pct === null ? "-" : Math.round(pct) + "%";
+              const pctCls = level === "exceeded" ? " bad" : pct !== null && pct >= 80 ? " warn" : "";
+              const barCls = level === "exceeded" ? " danger" : level === "warning" ? " warning" : "";
+
+              rowsHtml += '<div class="oc-win-row">' +
+                '<span class="oc-win-name">' + def.name + '</span>' +
+                '<div class="progress-track oc-win-bar"><div class="progress-bar' + barCls + '" style="width:' + (pct === null ? 0 : pct) + '%"></div></div>' +
+                '<span class="oc-win-pct' + pctCls + '">' + pctText + '</span>' +
+                '<span class="oc-win-reset countdown-timer">-</span>' +
+                '</div>';
+              ocTargets.push({ el: null, target: target });
+            });
+
+            const chipText = keyWorst === "exceeded" ? "超限" : keyWorst === "warning" ? "紧张" : "正常";
+            html += '<div class="oc-key-group">' +
+              '<div class="oc-key-head"><span class="oc-key-id">' + keyId + '</span>' +
+              '<span class="oc-key-chip status-badge ' + keyWorst + '"><span class="status-dot"></span><span>' + chipText + '</span></span></div>' +
+              '<div class="oc-key-body">' + rowsHtml + '</div>' +
+              '</div>';
+          } else {
+            // 失败 key 无 windows 字段：只渲染 key 头 + 错误行
+            if (rank.exceeded > rank[worst]) worst = "exceeded";
+            const is401 = k.status_code === 401;
+            const label = is401 ? "凭据无效" : "查询错误";
+            const statusPart = k.status_code ? "上游 " + esc(String(k.status_code)) : "查询失败";
+            const errTail = k.error ? "：" + esc(k.error) : "";
+            const tip = is401 ? "，请检查该 key 或从配置中移除" : "";
+            html += '<div class="oc-key-group">' +
+              '<div class="oc-key-head"><span class="oc-key-id">' + keyId + '</span>' +
+              '<span class="oc-key-chip status-badge exceeded"><span class="status-dot"></span><span>' + label + '</span></span></div>' +
+              '<div class="oc-key-error">' + label + '（' + statusPart + '）' + errTail + tip + '</div>' +
+              '</div>';
           }
-          if (!target && w.reset_in_seconds > 0) {
-            target = new Date(Date.now() + Number(w.reset_in_seconds) * 1000);
-          }
-          ocTargets[d.key] = target;
-          if (!target) d.timer.textContent = "-";
         });
 
+        ocContent.innerHTML = html;
+
+        // 绑定多 key x 3 窗口的倒计时元素（与 ocTargets 顺序一致）
+        const resetEls = ocContent.querySelectorAll(".oc-win-reset");
+        for (let i = 0; i < ocTargets.length; i++) {
+          if (resetEls[i]) ocTargets[i].el = resetEls[i];
+        }
+        updateTimers();
+
         setProviderStatus("opencode", worst);
       }
 
@@ -1600,19 +1644,32 @@ const QuotaPageHTML = `<!DOCTYPE html>
           allBodyOpencode.innerHTML = '<div class="error-card-title">OpenCode Go 查询失败</div><div class="error-card-msg">' + esc(oc.err) + '</div>';
         } else if (oc.data) {
           const data = oc.data;
-          const windows = data.windows || {};
-          const defs = [
-            { name: "Rolling 5h", w: windows.rolling },
-            { name: "Weekly", w: windows.weekly },
-            { name: "Monthly", w: windows.monthly }
-          ];
+          // 多 key 契约：逐 key 紧凑列表（key_id + 最差窗口 percent + miniBar）
+          const keys = Array.isArray(data.keys) ? data.keys : [];
           let html = "";
-          defs.forEach(function (d) {
-            const win = d.w || {};
-            const pct = clampPercent(win.percent);
-            const level = levelOf(pct, win.exceeded, win.status);
-            html += summaryRow(d.name, pct === null ? "-" : pct.toFixed(1) + "%") + miniBar(pct, level);
+          keys.forEach(function (k) {
+            const keyId = '<span class="all-key-id">' + esc(k.key_id || "***") + '</span>';
+            if (k.ok && k.windows) {
+              const wins = [k.windows.rolling || {}, k.windows.weekly || {}, k.windows.monthly || {}];
+              let worstPct = null;
+              let worstLevel = "online";
+              wins.forEach(function (w) {
+                const pct = clampPercent(w.percent);
+                const level = levelOf(pct, w.exceeded, w.status);
+                if (worstPct === null || (pct !== null && pct > worstPct) || level === "exceeded") {
+                  worstPct = pct === null ? 0 : pct;
+                  worstLevel = level;
+                }
+              });
+              html += summaryRow(keyId, worstPct === null ? "-" : Math.round(worstPct) + "%") + miniBar(worstPct, worstLevel);
+            } else {
+              const label = k.status_code === 401 ? "凭据无效" : "查询错误";
+              html += summaryRow(keyId, '<span class="error-card-msg" style="font-size:12px">' + label + '</span>');
+            }
           });
+          if (!html) {
+            html = '<div class="all-summary-value">无 key 数据</div>';
+          }
           allBadgeOpencode.className = "status-badge " + badgeVisualClass(oc.level);
           allBadgeTextOpencode.textContent = BADGE_TEXT[oc.level] || "-";
           allBodyOpencode.innerHTML = html;
@@ -1648,7 +1705,7 @@ const QuotaPageHTML = `<!DOCTYPE html>
 
         const mgmtKey = getStoredManagementKey();
         const overrideToken = inputSessionToken.value.trim();
-        const overrideOpenCodeKey = inputOpenCodeKey.value.trim();
+        const overrideOpenCodeKeys = inputOpenCodeKeys.value.split("\n").map(function (s) { return s.trim(); }).filter(Boolean);
 
         const headers = {
           "Accept": "application/json",
@@ -1665,8 +1722,9 @@ const QuotaPageHTML = `<!DOCTYPE html>
         if (overrideToken) {
           bodyObj.session_token = overrideToken;
         }
-        if (overrideOpenCodeKey) {
-          bodyObj.opencode_api_key = overrideOpenCodeKey;
+        // 非空才进 body：list 优先（后端仍接受旧 scalar 字段，前端不再发送）
+        if (overrideOpenCodeKeys.length > 0) {
+          bodyObj.opencode_api_keys = overrideOpenCodeKeys;
         }
 
         try {
diff --git a/plugin/types.go b/plugin/types.go
index 6b42bec..ebcb703 100644
--- a/plugin/types.go
+++ b/plugin/types.go
@@ -294,10 +294,35 @@ type OpenCodeFormattedUsageResponse struct {
 	Error     string                   `json:"error,omitempty"`
 }
 
+// OpenCodeKeyResult is the per-key outcome of a multi-key OpenCode Go query
+// (v0.4.0). Windows is a pointer so failed keys omit the field entirely
+// instead of marshaling a zero-value struct with "status":"" noise.
+type OpenCodeKeyResult struct {
+	KeyID      string                    `json:"key_id"`
+	OK         bool                      `json:"ok"`
+	Windows    *OpenCodeFormattedWindows `json:"windows,omitempty"`
+	StatusCode int                       `json:"status_code"`
+	Error      string                    `json:"error,omitempty"`
+	UpdatedAt  string                    `json:"updated_at,omitempty"`
+}
+
+// OpenCodeMultiKeyResponse is the multi-key OpenCode Go usage payload returned
+// by /plugins/commandcode/opencode/usage and the opencode field of /all.
+// Top-level Error is non-empty only when no key is configured at all.
+type OpenCodeMultiKeyResponse struct {
+	OK        bool                `json:"ok"`
+	Provider  string              `json:"provider"` // "opencode_go"
+	Keys      []OpenCodeKeyResult `json:"keys"`
+	UpdatedAt string              `json:"updated_at"`
+	Error     string              `json:"error,omitempty"`
+}
+
 // AllUsageResponse aggregates both providers for /plugins/commandcode/all.
 // Partial failure semantics: each provider's payload is present only on success;
-// failures are reported in Errors. CommandCode/OpenCode carry the raw JSON of the
-// respective FormattedUsageResponse / OpenCodeFormattedUsageResponse.
+// failures are reported in Errors. CommandCode carries the raw JSON of
+// FormattedUsageResponse; OpenCode carries the raw JSON of
+// OpenCodeMultiKeyResponse (v0.4.0 breaking change: no longer the single-key
+// OpenCodeFormattedUsageResponse).
 type AllUsageResponse struct {
 	OK          bool              `json:"ok"` // at least one provider succeeded
 	CommandCode json.RawMessage   `json:"commandcode,omitempty"`
diff --git a/plugin/usage.go b/plugin/usage.go
index 49a0c9c..1226311 100644
--- a/plugin/usage.go
+++ b/plugin/usage.go
@@ -224,6 +224,31 @@ func clampOpenCodePercent(p float64) float64 {
 	return math.Round(p*100) / 100
 }
 
+// MaskAPIKey masks an OpenCode Go API key for display: first 4 + "…" + last 4
+// characters (e.g. "sk-L…KqYB"). Keys shorter than 8 characters are fully
+// masked as "***"; an empty key masks to "".
+func MaskAPIKey(key string) string {
+	if key == "" {
+		return ""
+	}
+	if len(key) < 8 {
+		return "***"
+	}
+	return key[:4] + "…" + key[len(key)-4:]
+}
+
+// QueryOpenCodeKeys queries OpenCode Go usage for each key sequentially and
+// returns one typed result per key, in input order. A single key's failure is
+// recorded only in that key's result and never aborts the loop.
+func QueryOpenCodeKeys(ctx context.Context, apiBase string, keys []string, hostCallbackID string) []OpenCodeKeyResult {
+	results := make([]OpenCodeKeyResult, 0, len(keys))
+	for _, key := range keys {
+		res, _ := queryOpenCodeKey(ctx, apiBase, key, hostCallbackID)
+		results = append(results, res)
+	}
+	return results
+}
+
 // ParseAndFormatUsage parses upstream credits JSON into structured usage metrics.
 // summary (optional) carries the billing-period usage totals used to derive the monthly window.
 func ParseAndFormatUsage(raw []byte, summary *UpstreamUsageSummaryResponse, now time.Time) (*FormattedUsageResponse, error) {
diff --git a/plugin/usage_test.go b/plugin/usage_test.go
index 432f5d4..9d30e42 100644
--- a/plugin/usage_test.go
+++ b/plugin/usage_test.go
@@ -642,6 +642,110 @@ func TestFetchOpenCodeUsageRaw_UpstreamNon200(t *testing.T) {
 	}
 }
 
+func TestMaskAPIKey(t *testing.T) {
+	tests := []struct {
+		name string
+		key  string
+		want string
+	}{
+		{"empty", "", ""},
+		{"normal key", "sk-LongExampleKqYB", "sk-L…KqYB"},
+		{"exactly 8 chars", "12345678", "1234…5678"},
+		{"7 chars fully masked", "1234567", "***"},
+		{"1 char", "x", "***"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := MaskAPIKey(tt.key); got != tt.want {
+				t.Errorf("MaskAPIKey(%q) = %q, want %q", tt.key, got, tt.want)
+			}
+		})
+	}
+}
+
+// Double-key isolation: one key succeeds, the other gets a 401 — the failure
+// must be contained in its own result, must not abort the loop, and the raw
+// key must never appear in any result field.
+func TestQueryOpenCodeKeys_IsolationAndOrder(t *testing.T) {
+	var authOrder []string
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		authOrder = append(authOrder, r.Header.Get("Authorization"))
+		switch r.Header.Get("Authorization") {
+		case "Bearer sk-good-AAAA":
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(mockOpencodeUsageJSON))
+		default:
+			w.WriteHeader(http.StatusUnauthorized)
+			_, _ = w.Write([]byte(`{"error":"invalid api key"}`))
+		}
+	}))
+	defer ts.Close()
+
+	SetHostCaller(nil)
+	SetDefaultHTTPClient(ts.Client())
+	defer func() {
+		SetDefaultHTTPClient(&http.Client{Timeout: 15 * time.Second})
+	}()
+
+	keys := []string{"sk-good-AAAA", "sk-bad-BBBB"}
+	results := QueryOpenCodeKeys(context.Background(), ts.URL, keys, "")
+
+	if len(results) != 2 {
+		t.Fatalf("len(results) = %d, want 2", len(results))
+	}
+
+	// Order preserved: requests issued in input order.
+	if len(authOrder) != 2 || authOrder[0] != "Bearer sk-good-AAAA" || authOrder[1] != "Bearer sk-bad-BBBB" {
+		t.Errorf("request order = %v, want sequential input order", authOrder)
+	}
+
+	ok := results[0]
+	if !ok.OK || ok.StatusCode != http.StatusOK {
+		t.Errorf("results[0] = %+v, want OK=true status=200", ok)
+	}
+	if ok.Windows == nil {
+		t.Fatal("results[0].Windows = nil, want non-nil on success")
+	}
+	if ok.Windows.Rolling.Percent != 4 || ok.Windows.Weekly.Percent != 46 || ok.Windows.Monthly.Percent != 23 {
+		t.Errorf("results[0] percents = %v/%v/%v, want 4/46/23",
+			ok.Windows.Rolling.Percent, ok.Windows.Weekly.Percent, ok.Windows.Monthly.Percent)
+	}
+	if ok.KeyID != MaskAPIKey("sk-good-AAAA") {
+		t.Errorf("results[0].KeyID = %q, want masked id %q", ok.KeyID, MaskAPIKey("sk-good-AAAA"))
+	}
+
+	bad := results[1]
+	if bad.OK {
+		t.Errorf("results[1].OK = true, want false (401 must not abort the loop)")
+	}
+	if bad.Windows != nil {
+		t.Errorf("results[1].Windows = %+v, want nil on failure", bad.Windows)
+	}
+	if bad.StatusCode != http.StatusUnauthorized {
+		t.Errorf("results[1].StatusCode = %d, want 401", bad.StatusCode)
+	}
+	if !strings.Contains(bad.Error, "opencode upstream returned 401") {
+		t.Errorf("results[1].Error = %q, want it to mention the upstream 401", bad.Error)
+	}
+
+	// Raw keys must never leak into any serialized result field.
+	raw, _ := json.Marshal(results)
+	if strings.Contains(string(raw), "sk-good-AAAA") || strings.Contains(string(raw), "sk-bad-BBBB") {
+		t.Errorf("serialized results leak a raw key: %s", string(raw))
+	}
+}
+
+func TestQueryOpenCodeKeys_EmptyKeyInList(t *testing.T) {
+	SetHostCaller(nil)
+	results := QueryOpenCodeKeys(context.Background(), "", []string{""}, "")
+	if len(results) != 1 {
+		t.Fatalf("len(results) = %d, want 1", len(results))
+	}
+	if results[0].OK || results[0].StatusCode != http.StatusBadRequest {
+		t.Errorf("results[0] = %+v, want local 400 result", results[0])
+	}
+}
+
 func TestFetchOpenCodeUsageRaw_HostCaller(t *testing.T) {
 	mockResponsePayload := []byte(`{"usage":{"rolling":{"status":"ok","percent":7,"resetsAt":"2026-09-17T06:58:53Z"}}}`)