diff --git a/README.md b/README.md
index 76ad67d..3856009 100644
--- a/README.md
+++ b/README.md
@@ -288,6 +288,30 @@ REMOTE_PASSWORD='your-password' \
 
 The script uploads `cmd/`, `internal/`, `vendor/`, `go.mod`, and `go.sum`, prepares a Docker build context on the server, then rebuilds the runtime image there with a multi-stage Docker build. The remote host needs `docker`, `tar`, and `curl`; it does not need a host Go installation, but it does need network access to pull the base Docker images if they are not already cached.
 
+### API Authentication
+
+Set one or more API keys with `LINGMA_PROXY_API_KEYS` or the JSON config field `api_keys`:
+
+```bash
+export LINGMA_PROXY_API_KEYS="key-one,key-two"
+go run ./cmd/lingma-ipc-proxy --host 127.0.0.1 --port 8095
+```
+
+```json
+{
+  "api_keys": ["key-one", "key-two"]
+}
+```
+
+The deployment script also passes through `LINGMA_PROXY_API_KEYS`, so the same key set can be enabled on the remote server during deploy.
+
+When keys are configured, all API endpoints except `/`, `/health`, `/runtime/status`, and `/v1/runtime/status` require authentication. Clients can send either:
+
+- `Authorization: Bearer <key>`
+- `x-api-key: <key>`
+
+This works well with OpenAI-compatible clients that already expose an API key field.
+
 ## Client Configuration
 
 ### Claude Code
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 559108a..1fb4371 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -363,6 +363,30 @@ REMOTE_PASSWORD='your-password' \
 
 脚本会上传 `cmd/`、`internal/`、`vendor/`、`go.mod` 和 `go.sum`，在服务器上准备 Docker 构建上下文，然后用多阶段 Docker build 重建运行时镜像。远端主机需要预装 `docker`、`tar`、`curl`；不需要额外安装宿主机 Go，但如果相关基础镜像未缓存，仍需要能拉取 Docker 基础镜像。
 
+### API 鉴权
+
+可以通过环境变量 `LINGMA_PROXY_API_KEYS` 或 JSON 配置里的 `api_keys` 设置一个或多个 API Key：
+
+```bash
+export LINGMA_PROXY_API_KEYS="key-one,key-two"
+go run ./cmd/lingma-ipc-proxy --host 127.0.0.1 --port 8095
+```
+
+```json
+{
+  "api_keys": ["key-one", "key-two"]
+}
+```
+
+部署脚本也会透传 `LINGMA_PROXY_API_KEYS`，所以可以在远端部署时一起启用同一组 key。
+
+配置了 key 之后，除 `/`、`/health`、`/runtime/status`、`/v1/runtime/status` 之外的接口都会要求鉴权。客户端可以使用：
+
+- `Authorization: Bearer <key>`
+- `x-api-key: <key>`
+
+这也兼容大多数 OpenAI 兼容客户端自带的 API Key 配置方式。
+
 ## 客户端配置
 
 ### Claude Code
diff --git a/cmd/lingma-ipc-proxy/main.go b/cmd/lingma-ipc-proxy/main.go
index a9d30ae..f88d3a2 100644
--- a/cmd/lingma-ipc-proxy/main.go
+++ b/cmd/lingma-ipc-proxy/main.go
@@ -31,6 +31,7 @@ type fileConfig struct {
 	RemoteBaseURL              string   `json:"remote_base_url"`
 	RemoteAuthFile             string   `json:"remote_auth_file"`
 	RemoteVersion              string   `json:"remote_version"`
+	APIKeys                    []string `json:"api_keys"`
 	Cwd                        string   `json:"cwd"`
 	CurrentFilePath            string   `json:"current_file_path"`
 	Mode                       string   `json:"mode"`
@@ -144,6 +145,7 @@ func loadConfig() (service.Config, string) {
 	remoteBaseURL := flag.String("remote-base-url", cfg.RemoteBaseURL, "Remote Lingma API base URL")
 	remoteAuthFile := flag.String("remote-auth-file", cfg.RemoteAuthFile, "Remote Lingma credentials.json path; empty reads ~/.lingma cache")
 	remoteVersion := flag.String("remote-version", cfg.RemoteVersion, "Remote Lingma cosy version")
+	apiKeys := flag.String("api-keys", strings.Join(cfg.APIKeys, ","), "Comma-separated API keys accepted via Authorization Bearer or x-api-key")
 	cwd := flag.String("cwd", cfg.Cwd, "Working directory used when creating Lingma sessions")
 	currentFilePath := flag.String("current-file-path", cfg.CurrentFilePath, "Current file path sent through ACP meta")
 	mode := flag.String("mode", cfg.Mode, "Lingma ACP mode value")
@@ -181,6 +183,7 @@ func loadConfig() (service.Config, string) {
 	cfg.RemoteBaseURL = strings.TrimSpace(*remoteBaseURL)
 	cfg.RemoteAuthFile = strings.TrimSpace(*remoteAuthFile)
 	cfg.RemoteVersion = strings.TrimSpace(*remoteVersion)
+	cfg.APIKeys = splitCSV(*apiKeys)
 	cfg.Cwd = strings.TrimSpace(*cwd)
 	cfg.CurrentFilePath = strings.TrimSpace(*currentFilePath)
 	cfg.Mode = strings.TrimSpace(*mode)
@@ -268,6 +271,9 @@ func overlayFileConfig(dst *service.Config, src fileConfig) {
 	if strings.TrimSpace(src.RemoteVersion) != "" {
 		dst.RemoteVersion = strings.TrimSpace(src.RemoteVersion)
 	}
+	if len(src.APIKeys) > 0 {
+		dst.APIKeys = cleanStringSlice(src.APIKeys)
+	}
 	if strings.TrimSpace(src.Cwd) != "" {
 		dst.Cwd = strings.TrimSpace(src.Cwd)
 	}
@@ -361,6 +367,9 @@ func overlayEnvConfig(dst *service.Config) {
 	if value := strings.TrimSpace(os.Getenv("LINGMA_REMOTE_VERSION")); value != "" {
 		dst.RemoteVersion = value
 	}
+	if value := strings.TrimSpace(os.Getenv("LINGMA_PROXY_API_KEYS")); value != "" {
+		dst.APIKeys = splitCSV(value)
+	}
 	if value := strings.TrimSpace(os.Getenv("LINGMA_PROXY_CWD")); value != "" {
 		dst.Cwd = value
 	}
diff --git a/config.example.json b/config.example.json
index 903541f..c12639a 100644
--- a/config.example.json
+++ b/config.example.json
@@ -22,6 +22,10 @@
   "pipe": "",
   "websocket_url": "",
   "remote_auth_file": "/secrets/credentials.json",
+  "api_keys": [
+    "replace-with-long-random-key-1",
+    "replace-with-long-random-key-2"
+  ],
   "lingma_bootstrap_enabled": true,
   "lingma_source_type": "marketplace",
   "lingma_vsix_url": "",
diff --git a/internal/httpapi/server.go b/internal/httpapi/server.go
index 794d557..3656136 100644
--- a/internal/httpapi/server.go
+++ b/internal/httpapi/server.go
@@ -126,7 +126,7 @@ func NewServer(addr string, svc *service.Service) *Server {
 
 	s.http = &http.Server{
 		Addr:              addr,
-		Handler:           s.withRecorder(withCORS(mux)),
+		Handler:           s.withRecorder(withCORS(s.withAuth(mux))),
 		ReadHeaderTimeout: 10 * time.Second,
 	}
 	return s
@@ -1686,6 +1686,65 @@ func writeOpenAIError(w http.ResponseWriter, status int, kind string, message st
 	})
 }
 
+func isPublicPath(path string) bool {
+	switch path {
+	case "/", "/health", "/runtime/status", "/v1/runtime/status":
+		return true
+	default:
+		return false
+	}
+}
+
+func isAnthropicPath(path string) bool {
+	switch path {
+	case "/v1/messages", "/v1/messages/count_tokens":
+		return true
+	default:
+		return false
+	}
+}
+
+func extractAPIKey(r *http.Request) string {
+	if value := strings.TrimSpace(r.Header.Get("x-api-key")); value != "" {
+		return value
+	}
+	auth := strings.TrimSpace(r.Header.Get("Authorization"))
+	if auth == "" {
+		return ""
+	}
+	parts := strings.SplitN(auth, " ", 2)
+	if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
+		return ""
+	}
+	return strings.TrimSpace(parts[1])
+}
+
+func (s *Server) withAuth(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if isPublicPath(r.URL.Path) {
+			next.ServeHTTP(w, r)
+			return
+		}
+		keys := s.svc.APIKeys()
+		if len(keys) == 0 {
+			next.ServeHTTP(w, r)
+			return
+		}
+		provided := extractAPIKey(r)
+		for _, key := range keys {
+			if provided == key {
+				next.ServeHTTP(w, r)
+				return
+			}
+		}
+		if isAnthropicPath(r.URL.Path) {
+			writeAnthropicError(w, http.StatusUnauthorized, "authentication_error", "invalid or missing API key")
+			return
+		}
+		writeOpenAIError(w, http.StatusUnauthorized, "authentication_error", "invalid or missing API key")
+	})
+}
+
 func streamingHeaders(w http.ResponseWriter) {
 	w.Header().Set("Content-Type", "text/event-stream")
 	w.Header().Set("Cache-Control", "no-cache")
diff --git a/internal/httpapi/server_test.go b/internal/httpapi/server_test.go
index efc60fd..0cea98b 100644
--- a/internal/httpapi/server_test.go
+++ b/internal/httpapi/server_test.go
@@ -81,6 +81,83 @@ func TestCapabilitiesAdvertiseAgentCompatibility(t *testing.T) {
 	}
 }
 
+func TestAuthAllowsPublicHealthWithoutAPIKey(t *testing.T) {
+	server := NewServer("", service.New(service.Config{
+		Model:   "Qwen3-Coder",
+		Timeout: time.Second,
+		APIKeys: []string{"key-1", "key-2"},
+	}))
+
+	req := httptest.NewRequest(http.MethodGet, "/health", nil)
+	rec := httptest.NewRecorder()
+	server.http.Handler.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d body = %s", rec.Code, rec.Body.String())
+	}
+}
+
+func TestAuthRejectsProtectedEndpointWithoutAPIKey(t *testing.T) {
+	server := NewServer("", service.New(service.Config{
+		Model:   "Qwen3-Coder",
+		Timeout: time.Second,
+		APIKeys: []string{"key-1", "key-2"},
+	}))
+
+	req := httptest.NewRequest(http.MethodGet, "/capabilities", nil)
+	rec := httptest.NewRecorder()
+	server.http.Handler.ServeHTTP(rec, req)
+	if rec.Code != http.StatusUnauthorized {
+		t.Fatalf("status = %d body = %s", rec.Code, rec.Body.String())
+	}
+	if !strings.Contains(rec.Body.String(), "authentication_error") {
+		t.Fatalf("body = %s", rec.Body.String())
+	}
+}
+
+func TestAuthAcceptsBearerAndXAPIKey(t *testing.T) {
+	server := NewServer("", service.New(service.Config{
+		Model:   "Qwen3-Coder",
+		Timeout: time.Second,
+		APIKeys: []string{"key-1", "key-2"},
+	}))
+
+	bearerReq := httptest.NewRequest(http.MethodGet, "/capabilities", nil)
+	bearerReq.Header.Set("Authorization", "Bearer key-2")
+	bearerRec := httptest.NewRecorder()
+	server.http.Handler.ServeHTTP(bearerRec, bearerReq)
+	if bearerRec.Code != http.StatusOK {
+		t.Fatalf("bearer status = %d body = %s", bearerRec.Code, bearerRec.Body.String())
+	}
+
+	xReq := httptest.NewRequest(http.MethodGet, "/capabilities", nil)
+	xReq.Header.Set("x-api-key", "key-1")
+	xRec := httptest.NewRecorder()
+	server.http.Handler.ServeHTTP(xRec, xReq)
+	if xRec.Code != http.StatusOK {
+		t.Fatalf("x-api-key status = %d body = %s", xRec.Code, xRec.Body.String())
+	}
+}
+
+func TestAnthropicAuthErrorShape(t *testing.T) {
+	server := NewServer("", service.New(service.Config{
+		Model:   "Qwen3-Coder",
+		Timeout: time.Second,
+		APIKeys: []string{"key-1"},
+	}))
+
+	req := httptest.NewRequest(http.MethodPost, "/v1/messages", strings.NewReader(`{"model":"kmodel","messages":[{"role":"user","content":"hello"}],"max_tokens":16}`))
+	req.Header.Set("Content-Type", "application/json")
+	rec := httptest.NewRecorder()
+	server.http.Handler.ServeHTTP(rec, req)
+	if rec.Code != http.StatusUnauthorized {
+		t.Fatalf("status = %d body = %s", rec.Code, rec.Body.String())
+	}
+	if !strings.Contains(rec.Body.String(), `"type":"error"`) {
+		t.Fatalf("body = %s", rec.Body.String())
+	}
+}
+
+
 func TestNormalizeOpenAIRequestRejectsMissingUserAndAssistantMessages(t *testing.T) {
 	req := openAIChatRequest{
 		Model: "test-model",
diff --git a/internal/service/service.go b/internal/service/service.go
index 6ed0b1a..8dc0d2b 100644
--- a/internal/service/service.go
+++ b/internal/service/service.go
@@ -53,6 +53,7 @@ type Config struct {
 	ShellType                  string
 	SessionMode                SessionMode
 	Timeout                    time.Duration
+	APIKeys                    []string
 	RemoteFallbackEnabled      bool
 	RemoteFallbackModels       []string
 	LingmaBootstrapEnabled     bool
@@ -185,6 +186,7 @@ func New(cfg Config) *Service {
 		cfg.Mode = "agent"
 	}
 	cfg.Model = strings.TrimSpace(cfg.Model)
+	cfg.APIKeys = cleanStringSlice(cfg.APIKeys)
 	if strings.TrimSpace(cfg.ShellType) == "" {
 		cfg.ShellType = lingmaipc.DefaultShellType()
 	}
@@ -247,6 +249,26 @@ func (s *Service) DefaultModel() string {
 	return strings.TrimSpace(s.cfg.Model)
 }
 
+func (s *Service) APIKeys() []string {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return append([]string(nil), s.cfg.APIKeys...)
+}
+
+func cleanStringSlice(values []string) []string {
+	out := make([]string, 0, len(values))
+	seen := map[string]bool{}
+	for _, value := range values {
+		item := strings.TrimSpace(value)
+		if item == "" || seen[item] {
+			continue
+		}
+		seen[item] = true
+		out = append(out, item)
+	}
+	return out
+}
+
 func (s *Service) PrepareRuntime() error {
 	s.mu.Lock()
 	cfg := s.cfg
diff --git a/scripts/deploy-remote.sh b/scripts/deploy-remote.sh
index afe4a39..78ecdeb 100755
--- a/scripts/deploy-remote.sh
+++ b/scripts/deploy-remote.sh
@@ -23,6 +23,7 @@ Optional environment variables:
   LINGMA_MARKETPLACE_PUBLISHER=Alibaba-Cloud
   LINGMA_MARKETPLACE_EXTENSION=tongyi-lingma
   LINGMA_PROXY_MODEL=org_auto
+  LINGMA_PROXY_API_KEYS=
   VERIFY_PUBLIC=false
 EOF
 }
@@ -74,7 +75,9 @@ LINGMA_VSIX_URL="${LINGMA_VSIX_URL:-https://tongyi-code.oss-cn-hangzhou.aliyuncs
 LINGMA_MARKETPLACE_PUBLISHER="${LINGMA_MARKETPLACE_PUBLISHER:-Alibaba-Cloud}"
 LINGMA_MARKETPLACE_EXTENSION="${LINGMA_MARKETPLACE_EXTENSION:-tongyi-lingma}"
 LINGMA_PROXY_MODEL="${LINGMA_PROXY_MODEL:-org_auto}"
+LINGMA_PROXY_API_KEYS="${LINGMA_PROXY_API_KEYS:-}"
 VERIFY_PUBLIC="${VERIFY_PUBLIC:-false}"
+VERIFY_API_KEY="${LINGMA_PROXY_API_KEYS%%,*}"
 
 if [ "$REMOTE_BUILD_DIR" = "$REMOTE_DIR" ]; then
   echo "REMOTE_BUILD_DIR must be different from REMOTE_DIR" >&2
@@ -151,6 +154,7 @@ LINGMA_SESSION_BUNDLE_FILE=/secrets/lingma-session.b64
 LINGMA_PROXY_BACKEND=remote
 LINGMA_PROXY_SESSION_MODE=auto
 LINGMA_PROXY_MODEL=$LINGMA_PROXY_MODEL
+LINGMA_PROXY_API_KEYS=$LINGMA_PROXY_API_KEYS
 LINGMA_PROXY_TIMEOUT_SECONDS=0
 LINGMA_REMOTE_FALLBACK_ENABLED=true
 EOF
@@ -183,7 +187,11 @@ echo "==> Waiting for remote health endpoint"
 
 echo
 echo "==> Remote models"
-"${SSH_BASE[@]}" "curl -fsS http://127.0.0.1:$REMOTE_PUBLIC_PORT/v1/models"
+if [ -n "$VERIFY_API_KEY" ]; then
+  "${SSH_BASE[@]}" "curl -fsS -H 'Authorization: Bearer $VERIFY_API_KEY' http://127.0.0.1:$REMOTE_PUBLIC_PORT/v1/models"
+else
+  "${SSH_BASE[@]}" "curl -fsS http://127.0.0.1:$REMOTE_PUBLIC_PORT/v1/models"
+fi
 
 if [ "$VERIFY_PUBLIC" = "true" ]; then
   echo