diff --git a/packages/core/package.json b/packages/core/package.json
index 21f7bdb16..85b930bbf 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -16,6 +16,7 @@
     "@logto/schemas": "^1.0.1",
     "dayjs": "^1.10.5",
     "dotenv": "^10.0.0",
+    "got": "^11.8.2",
     "koa": "^2.13.1",
     "koa-logger": "^3.2.1",
     "koa-mount": "^4.0.0",
diff --git a/packages/core/src/init/router.ts b/packages/core/src/init/router.ts
index 1b7246741..f8d722d6e 100644
--- a/packages/core/src/init/router.ts
+++ b/packages/core/src/init/router.ts
@@ -1,11 +1,17 @@
+import got from 'got';
 import Koa from 'koa';
 import Router from 'koa-router';
+import { promisify } from 'util';
+import stream from 'stream';
 import { signInRoute } from '../consts';
+import { getEnv } from '../utils';
 
+const pipeline = promisify(stream.pipeline);
 const router = new Router();
 
-router.get(signInRoute, (ctx) => {
-  ctx.body = 'Signing in';
+router.get(new RegExp(`^${signInRoute}(?:/|$)`), async (ctx) => {
+  // CAUTION: this is for dev purpose only, add a switch if needed
+  await pipeline(got.stream.get(getEnv('PLAYGROUND_URL')), ctx.res);
 });
 
 export default function initRouter(app: Koa): void {
diff --git a/packages/core/yarn.lock b/packages/core/yarn.lock
index 1a0580ccc..f6cd55cd8 100644
--- a/packages/core/yarn.lock
+++ b/packages/core/yarn.lock
@@ -2579,7 +2579,7 @@ globby@^9.2.0:
     pify "^4.0.1"
     slash "^2.0.0"
 
-got@^11.7.0:
+got@^11.7.0, got@^11.8.2:
   version "11.8.2"
   resolved "https://registry.yarnpkg.com/got/-/got-11.8.2.tgz#7abb3959ea28c31f3576f1576c1effce23f33599"
   integrity sha512-D0QywKgIe30ODs+fm8wMZiAcZjypcCodPNuMz5H9Mny7RJ+IjJ10BdmGW7OM7fHXP+O7r6ZwapQ/YQmMSvB0UQ==