Deploy your first Worker

Start with a minimal Worker and verify AI-generated edge code, development commands, and response output.

Outcome

Run a Worker locally and verify it with a real response instead of trusting an AI claim that deployment succeeded.

Prerequisites

npm create cloudflare@latest -- first-worker

Choose a Worker template in the prompt, then enter the generated directory.

src/index.ts

export default {
  async fetch() {
    return Response.json({ ok: true, message: 'hello from the edge' });
  },
};

npm run dev

Open the local URL printed by the command. Expected output:

{"ok":true,"message":"hello from the edge"}

Does it use the current Worker module syntax instead of the legacy Service Worker listener style?
Did it put a secret in source code or version control?
Can you find every Wrangler field in the current configuration reference?
Does the local response match the expected output above?