diff --git a/.env.example b/.env.example
index b1f36f0..6e5a647 100644
--- a/.env.example
+++ b/.env.example
@@ -1 +1,8 @@
+# postgresql url
 DATABASE_URL="postgresql://johndoe:randompassword@localhost:5432/mydb?schema=public"
+
+# Whether allow register user
+ALLOW_REGISTER=
+
+# For analyze tianji self
+WEBSITE_ID=
diff --git a/src/client/App.tsx b/src/client/App.tsx
index e97216b..8a71b66 100644
--- a/src/client/App.tsx
+++ b/src/client/App.tsx
@@ -13,9 +13,14 @@ import React from 'react';
 import { trpc, trpcClient } from './api/trpc';
 import { MonitorPage } from './pages/Monitor';
 import { WebsitePage } from './pages/Website';
+import { useGlobalConfig } from './hooks/useConfig';
+import { useInjectWebsiteScript } from './hooks/useInjectWebsiteScript';
 
 export const AppRoutes: React.FC = React.memo(() => {
   const { info } = useUserStore();
+  const { allowRegister } = useGlobalConfig();
+
+  useInjectWebsiteScript();
 
   return (
     <Routes>
@@ -30,7 +35,7 @@ export const AppRoutes: React.FC = React.memo(() => {
       ) : (
         <Route>
           <Route path="/login" element={<Login />} />
-          <Route path="/register" element={<Register />} />
+          {allowRegister && <Route path="/register" element={<Register />} />}
         </Route>
       )}
 
diff --git a/src/client/hooks/useConfig.ts b/src/client/hooks/useConfig.ts
new file mode 100644
index 0000000..af58930
--- /dev/null
+++ b/src/client/hooks/useConfig.ts
@@ -0,0 +1,19 @@
+import { AppRouterOutput, trpc } from '../api/trpc';
+
+const defaultGlobalConfig: AppRouterOutput['global']['config'] = {
+  allowRegister: false,
+};
+
+/**
+ * Fetch settings from server
+ */
+export function useGlobalConfig(): AppRouterOutput['global']['config'] {
+  const { data = defaultGlobalConfig } = trpc.global.config.useQuery(
+    undefined,
+    {
+      staleTime: 1000 * 60 * 60 * 1, // 1 hour
+    }
+  );
+
+  return data;
+}
diff --git a/src/client/hooks/useDataReady.tsx b/src/client/hooks/useDataReady.tsx
new file mode 100644
index 0000000..56ca5b6
--- /dev/null
+++ b/src/client/hooks/useDataReady.tsx
@@ -0,0 +1,27 @@
+import { DependencyList, useLayoutEffect, useRef } from 'react';
+import { useEvent } from './useEvent';
+
+/**
+ * Call once on data ready(validator return true)
+ */
+export function useDataReady(
+  validator: () => boolean,
+  cb: () => void,
+  deps?: DependencyList
+) {
+  const isReadyRef = useRef(false);
+
+  const _validator = useEvent(validator);
+  const _callback = useEvent(cb);
+
+  useLayoutEffect(() => {
+    if (isReadyRef.current) {
+      return;
+    }
+
+    if (_validator() === true) {
+      _callback();
+      isReadyRef.current = true;
+    }
+  }, deps);
+}
diff --git a/src/client/hooks/useInjectWebsiteScript.ts b/src/client/hooks/useInjectWebsiteScript.ts
new file mode 100644
index 0000000..f57b258
--- /dev/null
+++ b/src/client/hooks/useInjectWebsiteScript.ts
@@ -0,0 +1,16 @@
+import { useGlobalConfig } from './useConfig';
+import { useDataReady } from './useDataReady';
+
+export function useInjectWebsiteScript() {
+  const { websiteId } = useGlobalConfig();
+
+  useDataReady(
+    () => typeof websiteId === 'string' && websiteId.length > 0,
+    () => {
+      const el = document.createElement('script');
+      el.src = location.origin + '/tracker.js';
+      el.setAttribute('data-website-id', String(websiteId));
+      document.head.append(el);
+    }
+  );
+}
diff --git a/src/client/pages/Login.tsx b/src/client/pages/Login.tsx
index 48e915e..3bd8f2e 100644
--- a/src/client/pages/Login.tsx
+++ b/src/client/pages/Login.tsx
@@ -5,6 +5,7 @@ import { useRequest } from '../hooks/useRequest';
 import { trpc } from '../api/trpc';
 import { setJWT } from '../api/auth';
 import { setUserInfo } from '../store/user';
+import { useGlobalConfig } from '../hooks/useConfig';
 
 export const Login: React.FC = React.memo(() => {
   const navigate = useNavigate();
@@ -20,6 +21,7 @@ export const Login: React.FC = React.memo(() => {
     setUserInfo(res.info);
     navigate('/dashboard');
   });
+  const { allowRegister } = useGlobalConfig();
 
   return (
     <div className="w-full h-full flex justify-center items-center">
@@ -51,18 +53,21 @@ export const Login: React.FC = React.memo(() => {
               Login
             </Button>
           </Form.Item>
-          <Form.Item>
-            <Button
-              size="large"
-              htmlType="button"
-              block={true}
-              onClick={() => {
-                navigate('/register');
-              }}
-            >
-              Register
-            </Button>
-          </Form.Item>
+
+          {allowRegister && (
+            <Form.Item>
+              <Button
+                size="large"
+                htmlType="button"
+                block={true}
+                onClick={() => {
+                  navigate('/register');
+                }}
+              >
+                Register
+              </Button>
+            </Form.Item>
+          )}
         </Form>
       </div>
     </div>
diff --git a/src/server/trpc/routers/global.ts b/src/server/trpc/routers/global.ts
new file mode 100644
index 0000000..8720889
--- /dev/null
+++ b/src/server/trpc/routers/global.ts
@@ -0,0 +1,14 @@
+import { publicProcedure, router } from '../trpc';
+
+export const globalRouter = router({
+  config: publicProcedure.query(async ({ input }) => {
+    return {
+      allowRegister: checkEnvTrusty(process.env.ALLOW_REGISTER),
+      websiteId: process.env.WEBSITE_ID,
+    };
+  }),
+});
+
+function checkEnvTrusty(env: string | undefined): boolean {
+  return env === '1' || env === 'true';
+}
diff --git a/src/server/trpc/routers/index.ts b/src/server/trpc/routers/index.ts
index c419132..1bd53be 100644
--- a/src/server/trpc/routers/index.ts
+++ b/src/server/trpc/routers/index.ts
@@ -4,8 +4,10 @@ import { websiteRouter } from './website';
 import { monitorRouter } from './monitor';
 import { userRouter } from './user';
 import { workspaceRouter } from './workspace';
+import { globalRouter } from './global';
 
 export const appRouter = router({
+  global: globalRouter,
   user: userRouter,
   workspace: workspaceRouter,
   website: websiteRouter,