fix(api): make meta routes unauthed (#1471)

Co-authored-by: Tat Dat Duong <david@duong.cz>

.changeset/new-squids-strive.md

@@ -0,0 +1,5 @@
+---
+"@langchain/langgraph-api": patch
+---
+
+exlcude meta routes from auth

libs/langgraph-api/src/auth/custom.mts

@@ -72,6 +72,9 @@ export const auth = (): MiddlewareHandler => {
   return async (c, next) => {
     if (!isAuthRegistered()) return next();
 
+    // skip for /info
+    if (c.req.path === "/info") return next();
+
     if (
       !isStudioAuthDisabled() &&
       c.req.header("x-auth-scheme") === "langsmith"

libs/langgraph-api/tests/auth.test.mts

@@ -743,3 +743,11 @@ it.skipIf(process.version.startsWith("v18."))(
     expect(chunks.find((i) => i.event === "error")).not.toBeDefined();
   }
 );
+
+it("info endpoint", async () => {
+  const res = await fetch(API_URL + "/info");
+  expect(res.status).toBe(200);
+
+  const json = await res.json();
+  expect(json).toMatchObject({ version: expect.any(String) });
+});