diff --git a/packages/auth/src/index.ts b/packages/auth/src/index.ts
index c7e8309..964e5d6 100644
--- a/packages/auth/src/index.ts
+++ b/packages/auth/src/index.ts
@@ -1,6 +1,7 @@
 export type { User } from "./entities/user";
 export type { Session } from "./entities/session";
 export type { Cookie } from "./entities/cookie";
+export type { AuthRouter } from "./integrations/api/router";
 export {
   AuthenticationError,
   UnauthenticatedError,
diff --git a/packages/blog/src/index.ts b/packages/blog/src/index.ts
index b4f6235..5cad050 100644
--- a/packages/blog/src/index.ts
+++ b/packages/blog/src/index.ts
@@ -1,3 +1,4 @@
 export type { Article, ArticleStatus } from "./entities/article";
+export type { BlogRouter } from "./integrations/api/router";
 export { ArticleNotFoundError, InputParseError } from "./entities/errors";
 export { articleBySlugQuery, listArticlesQuery } from "./ui/query";
diff --git a/packages/core-api/package.json b/packages/core-api/package.json
index d7cceb5..0283021 100644
--- a/packages/core-api/package.json
+++ b/packages/core-api/package.json
@@ -12,6 +12,7 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
+    "@repo/auth": "workspace:*",
     "@repo/blog": "workspace:*",
     "@repo/core-shared": "workspace:*",
     "@trpc/server": "^11.0.0"
diff --git a/packages/core-api/src/root.ts b/packages/core-api/src/root.ts
index f940fe8..9f238e0 100644
--- a/packages/core-api/src/root.ts
+++ b/packages/core-api/src/root.ts
@@ -1,8 +1,15 @@
+import type { AuthRouter } from "@repo/auth";
+import type { BlogRouter } from "@repo/blog";
 import { router } from "@repo/core-shared/trpc/init";
+import { authRouter } from "@repo/auth/api";
 import { blogRouter } from "@repo/blog/api";
 
 export const appRouter = router({
+  auth: authRouter,
   blog: blogRouter,
 });
 
-export type AppRouter = typeof appRouter;
+export type AppRouter = {
+  auth: AuthRouter;
+  blog: BlogRouter;
+};
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f0b3643..2cdb3ff 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -361,6 +361,9 @@ importers:
 
   packages/core-api:
     dependencies:
+      '@repo/auth':
+        specifier: workspace:*
+        version: link:../auth
       '@repo/blog':
         specifier: workspace:*
         version: link:../blog