refactor: Update MCP composer auth to just api and oauth (#9487)

* Update auth to just api and oauth

* schema push

* pr comment fix

src/backend/base/langflow/api/v1/mcp_projects.py

@@ -39,7 +39,6 @@ from langflow.base.mcp.constants import MAX_MCP_SERVER_NAME_LENGTH
 from langflow.base.mcp.util import sanitize_mcp_name
 from langflow.services.database.models import Flow, Folder
 from langflow.services.deps import get_settings_service, session_scope
-from langflow.services.settings.feature_flags import FEATURE_FLAGS
 
 logger = logging.getLogger(__name__)
 
@@ -368,7 +367,6 @@ async def install_mcp_config(
         # Determine command and args based on operating system
         os_type = platform.system()
         command = "uvx"
-        mcp_tool = "mcp-composer" if FEATURE_FLAGS.mcp_composer else "mcp-proxy"
 
         # Check if running on WSL (will appear as Linux but with Microsoft in release info)
         is_wsl = os_type == "Linux" and "microsoft" in platform.uname().release.lower()
@@ -398,33 +396,8 @@ async def install_mcp_config(
                         sse_url = sse_url.replace(f"http://{host}:{port}", f"http://{wsl_ip}:{port}")
                 except OSError as e:
                     logger.warning("Failed to get WSL IP address: %s. Using default URL.", str(e))
-
-        # Configure args based on the MCP tool
-        oauth_env = None
-        if FEATURE_FLAGS.mcp_composer:
-            args = [mcp_tool, "--sse-url", sse_url]
-
-            # Check for auth settings and add auth parameters
-            if project.auth_settings:
-                from langflow.api.v1.schemas import AuthSettings
-
-                auth_settings = AuthSettings(**project.auth_settings)
-                args.extend(["--auth_type", auth_settings.auth_type])
-
-                oauth_env = {
-                    "OAUTH_HOST": auth_settings.oauth_host,
-                    "OAUTH_PORT": auth_settings.oauth_port,
-                    "OAUTH_SERVER_URL": auth_settings.oauth_server_url,
-                    "OAUTH_CALLBACK_PATH": auth_settings.oauth_callback_path,
-                    "OAUTH_CLIENT_ID": auth_settings.oauth_client_id,
-                    "OAUTH_CLIENT_SECRET": auth_settings.oauth_client_secret,
-                    "OAUTH_AUTH_URL": auth_settings.oauth_auth_url,
-                    "OAUTH_TOKEN_URL": auth_settings.oauth_token_url,
-                    "OAUTH_MCP_SCOPE": auth_settings.oauth_mcp_scope,
-                    "OAUTH_PROVIDER_SCOPE": auth_settings.oauth_provider_scope,
-                }
         else:
-            args = [mcp_tool, sse_url]
+            args = ["mcp-proxy", sse_url]
 
         if os_type == "Windows":
             command = "cmd"
@@ -439,10 +412,6 @@ async def install_mcp_config(
             "args": args,
         }
 
-        # Add environment variables if mcp-composer feature flag is enabled and auth settings exist
-        if FEATURE_FLAGS.mcp_composer and oauth_env is not None:
-            server_config["env"] = oauth_env  # type: ignore[assignment]
-
         mcp_config = {
             "mcpServers": {f"lf-{sanitize_mcp_name(name)[: (MAX_MCP_SERVER_NAME_LENGTH - 4)]}": server_config}
         }

src/backend/base/langflow/api/v1/schemas.py

@@ -444,12 +444,8 @@ class CancelFlowResponse(BaseModel):
 class AuthSettings(BaseModel):
     """Model representing authentication settings for MCP."""
 
-    auth_type: Literal["none", "apikey", "basic", "bearer", "iam", "oauth"] = "none"
+    auth_type: Literal["none", "apikey", "oauth"] = "none"
     api_key: SecretStr | None = None
-    username: str | None = None
-    password: SecretStr | None = None
-    bearer_token: SecretStr | None = None
-    iam_endpoint: str | None = None
     oauth_host: str | None = None
     oauth_port: str | None = None
     oauth_server_url: str | None = None

src/frontend/src/modals/authModal/index.tsx

@@ -21,10 +21,6 @@ const AuthModal = ({ open, setOpen, authSettings, onSave }: AuthModalProps) => {
   );
   const [authFields, setAuthFields] = useState<{
     apiKey?: string;
-    iamEndpoint?: string;
-    username?: string;
-    password?: string;
-    bearerToken?: string;
     oauthHost?: string;
     oauthPort?: string;
     oauthServerUrl?: string;
@@ -37,10 +33,6 @@ const AuthModal = ({ open, setOpen, authSettings, onSave }: AuthModalProps) => {
     oauthProviderScope?: string;
   }>({
     apiKey: authSettings?.api_key || "",
-    iamEndpoint: authSettings?.iam_endpoint || "",
-    username: authSettings?.username || "",
-    password: authSettings?.password || "",
-    bearerToken: authSettings?.bearer_token || "",
     oauthHost: authSettings?.oauth_host || "",
     oauthPort: authSettings?.oauth_port || "",
     oauthServerUrl: authSettings?.oauth_server_url || "",
@@ -59,10 +51,6 @@ const AuthModal = ({ open, setOpen, authSettings, onSave }: AuthModalProps) => {
       setAuthType(authSettings.auth_type || "none");
       setAuthFields({
         apiKey: authSettings.api_key || "",
-        iamEndpoint: authSettings.iam_endpoint || "",
-        username: authSettings.username || "",
-        password: authSettings.password || "",
-        bearerToken: authSettings.bearer_token || "",
         oauthHost: authSettings.oauth_host || "",
         oauthPort: authSettings.oauth_port || "",
         oauthServerUrl: authSettings.oauth_server_url || "",
@@ -93,15 +81,6 @@ const AuthModal = ({ open, setOpen, authSettings, onSave }: AuthModalProps) => {
     const authSettingsToSave: AuthSettingsType = {
       auth_type: authType,
       ...(authType === "apikey" && { api_key: authFields.apiKey }),
-      ...(authType === "basic" && {
-        username: authFields.username,
-        password: authFields.password,
-      }),
-      ...(authType === "iam" && {
-        iam_endpoint: authFields.iamEndpoint,
-        api_key: authFields.apiKey,
-      }),
-      ...(authType === "bearer" && { bearer_token: authFields.bearerToken }),
       ...(authType === "oauth" && {
         oauth_host: authFields.oauthHost,
         oauth_port: authFields.oauthPort,
@@ -188,95 +167,6 @@ const AuthModal = ({ open, setOpen, authSettings, onSave }: AuthModalProps) => {
                 </div>
               )}
 
-              {authType === "basic" && (
-                <div className="flex flex-col gap-4">
-                  <div className="flex flex-col gap-2">
-                    <Label htmlFor="username" className="!text-mmd font-medium">
-                      Username
-                    </Label>
-                    <Input
-                      id="username"
-                      type="text"
-                      placeholder="Enter Username"
-                      value={authFields.username || ""}
-                      onChange={(e) =>
-                        handleAuthFieldChange("username", e.target.value)
-                      }
-                    />
-                  </div>
-                  <div className="flex flex-col gap-2">
-                    <Label htmlFor="password" className="!text-mmd font-medium">
-                      Password
-                    </Label>
-                    <Input
-                      id="password"
-                      type="password"
-                      placeholder="Enter Password"
-                      value={authFields.password || ""}
-                      onChange={(e) =>
-                        handleAuthFieldChange("password", e.target.value)
-                      }
-                    />
-                  </div>
-                </div>
-              )}
-
-              {authType === "bearer" && (
-                <div className="flex flex-col gap-2">
-                  <Label
-                    htmlFor="bearer-token"
-                    className="!text-mmd font-medium"
-                  >
-                    Bearer Token
-                  </Label>
-                  <Input
-                    id="bearer-token"
-                    type="password"
-                    placeholder="Enter Bearer Token"
-                    value={authFields.bearerToken || ""}
-                    onChange={(e) =>
-                      handleAuthFieldChange("bearerToken", e.target.value)
-                    }
-                  />
-                </div>
-              )}
-
-              {authType === "iam" && (
-                <div className="flex flex-col gap-4">
-                  <div className="flex flex-col gap-2">
-                    <Label
-                      htmlFor="iam-endpoint"
-                      className="!text-mmd font-medium"
-                    >
-                      IAM Endpoint
-                    </Label>
-                    <Input
-                      id="iam-endpoint"
-                      type="text"
-                      placeholder="Enter IAM Endpoint"
-                      value={authFields.iamEndpoint || ""}
-                      onChange={(e) =>
-                        handleAuthFieldChange("iamEndpoint", e.target.value)
-                      }
-                    />
-                  </div>
-                  <div className="flex flex-col gap-2">
-                    <Label htmlFor="api-key" className="!text-mmd font-medium">
-                      API Key or Token
-                    </Label>
-                    <Input
-                      id="password"
-                      type="password"
-                      placeholder="Enter API Key or Token"
-                      value={authFields.apiKey || ""}
-                      onChange={(e) =>
-                        handleAuthFieldChange("apiKey", e.target.value)
-                      }
-                    />
-                  </div>
-                </div>
-              )}
-
               {authType === "oauth" && (
                 <div className="flex flex-col gap-4 h-full">
                   <span className="text-mmd font-medium text-muted-foreground">

src/frontend/src/pages/MainPage/pages/homePage/components/McpServerTab.tsx

@@ -240,62 +240,13 @@ const McpServerTab = ({ folderName }: { folderName: string }) => {
       return "";
     }
 
-    switch (currentAuthSettings.auth_type) {
+    if (currentAuthSettings.auth_type === "apikey") {
-      case "apikey":
+      return `
-        return `
         "--headers",
         "x-api-key",
         "${currentAuthSettings.api_key || "YOUR_API_KEY"}",`;
-      case "basic":
-        return `
-        "--headers",
-        "Authorization",
-        "Basic ${btoa(
-          `${currentAuthSettings.username || "USERNAME"}:${
-            currentAuthSettings.password || "PASSWORD"
-          }`,
-        )}",`;
-      case "bearer":
-        return `
-        "--headers",
-        "Authorization",
-        "Bearer ${currentAuthSettings.bearer_token || "YOUR_BEARER_TOKEN"}",`;
-      case "iam":
-        return `
-        "--headers",
-        "x-api-key",
-        "${currentAuthSettings.api_key || "YOUR_IAM_TOKEN"}",
-        "--headers",
-        "x-iam-endpoint",
-        "${currentAuthSettings.iam_endpoint || "YOUR_IAM_ENDPOINT"}",`;
-      case "oauth":
-        return `
-        "--auth_type",
-        "oauth",
-        "--sse-url",`;
-      default:
-        return "";
     }
-  };
 
-  const getEnvVars = () => {
-    if (!ENABLE_MCP_COMPOSER || currentAuthSettings?.auth_type === "none")
-      return "";
-    if (currentAuthSettings?.auth_type === "oauth") {
-      return `
-      "env": {
-        "OAUTH_HOST": "${currentAuthSettings.oauth_host || "YOUR_OAUTH_HOST"}",
-        "OAUTH_PORT": "${currentAuthSettings.oauth_port || "YOUR_OAUTH_PORT"}",
-        "OAUTH_SERVER_URL": "${currentAuthSettings.oauth_server_url || "YOUR_OAUTH_SERVER_URL"}",
-        "OAUTH_CALLBACK_PATH": "${currentAuthSettings.oauth_callback_path || "YOUR_OAUTH_CALLBACK_PATH"}",
-        "OAUTH_CLIENT_ID": "${currentAuthSettings.oauth_client_id || "YOUR_OAUTH_CLIENT_ID"}",
-        "OAUTH_CLIENT_SECRET": "${currentAuthSettings.oauth_client_secret || "YOUR_OAUTH_CLIENT_SECRET"}",
-        "OAUTH_AUTH_URL": "${currentAuthSettings.oauth_auth_url || "YOUR_OAUTH_AUTH_URL"}",
-        "OAUTH_TOKEN_URL": "${currentAuthSettings.oauth_token_url || "YOUR_OAUTH_TOKEN_URL"}",
-        "OAUTH_MCP_SCOPE": "${currentAuthSettings.oauth_mcp_scope || "YOUR_OAUTH_MCP_SCOPE"}",
-        "OAUTH_PROVIDER_SCOPE": "${currentAuthSettings.oauth_provider_scope || "YOUR_OAUTH_PROVIDER_SCOPE"}"
-      }`;
-    }
     return "";
   };
 
@@ -323,9 +274,9 @@ const McpServerTab = ({ folderName }: { folderName: string }) => {
               ? `"uvx",
         `
               : ""
-        }"${ENABLE_MCP_COMPOSER ? "mcp-composer" : "mcp-proxy"}",${getAuthHeaders()}
+        }"mcp-proxy",${getAuthHeaders()}
         "${apiUrl}"
-      ]${ENABLE_MCP_COMPOSER && currentAuthSettings?.auth_type === "oauth" ? `,` : ""}${getEnvVars()}
+      ]
     }
   }
 }`;

src/frontend/src/utils/mcpUtils.ts

@@ -3,21 +3,12 @@ import { MCPServerType } from "@/types/mcp";
 export enum AuthMethodId {
   NONE = "none",
   API_KEY = "apikey",
-  BASIC = "basic",
-  BEARER = "bearer",
-  IAM = "iam",
   OAUTH = "oauth",
 }
 
 export const AUTH_METHODS = {
   [AuthMethodId.NONE]: { id: AuthMethodId.NONE, label: "None" },
   [AuthMethodId.API_KEY]: { id: AuthMethodId.API_KEY, label: "API Key" },
-  [AuthMethodId.BASIC]: {
-    id: AuthMethodId.BASIC,
-    label: "Basic",
-  },
-  [AuthMethodId.BEARER]: { id: AuthMethodId.BEARER, label: "Bearer Token" },
-  [AuthMethodId.IAM]: { id: AuthMethodId.IAM, label: "IAM" },
   [AuthMethodId.OAUTH]: { id: AuthMethodId.OAUTH, label: "OAuth" },
 } as const;