v1.0 — Types that fly across repos
TypeScript Types
Over HTTP
Share types between backend and frontend without a monorepo or shared packages. Deploy independently. Sync on-demand. Unlike tRPC — true decoupling.
backend/server.ts — Pure TypeScript
import { route } from 'typeowl/server';
import typia from 'typia'; // Optional: for validation
// Define types with regular TypeScript
interface User { id: string; name: string; email: string; }
interface CreateUserInput { name: string; email: string; }
// Define routes with type parameters
const getUsers = route.get('/api/users').returns<User[]>();
const createUser = route.post('/api/users')
.body<CreateUserInput>() // Types extracted for frontend
.returns<User>();
// Wire up with any framework + validate with Typia
app.get(getUsers.path, async () => users);
app.post(createUser.path, async (req) => {
// Use route's body type for validation!
const input = typia.assert<createUser.bodyType>(req.body);
return createNewUser(input);
});
frontend/api.ts
// Types synced automatically! ✨
import type { User } from 'typeowl/types';
// Full autocomplete, type-safe responses
const users: User[] = await fetch('/api/users')
.then(r => r.json());
// POST with typed body
const newUser: User = await fetch('/api/users', {
method: 'POST',
body: JSON.stringify({
email: 'alice@example.com',
name: 'Alice'
})
}).then(r => r.json());
No validation out of the box. Use Typia with
typia.assert<route.bodyType>() — same type, 10-1000x faster than Zod.