Workers basics · Exercise 02

Add a binding

Create a Workers KV namespace, bind it to the Worker you already deployed, and read and write a value through it to prove the binding actually persists data.

Add a binding

This exercise extends the Worker you deployed in Deploy a Worker. You’ll create a Workers KV namespace, bind it to that Worker, and read and write a value through it — the first taste of what a Cloudflare binding is and why it matters. Your agent will guide you end to end.

What you’ll build

The same Worker, now with a KV binding on env. You’ll write a value (e.g. via a query string) and, in a separate request, read it back from the public URL. Getting the same value back proves the binding actually persists data, not that a single request just echoed something. Out of scope: multiple namespaces, TTLs, R2/D1, and other storage.

Prerequisites

Your agent can help you with these.

  • You’ve completed Deploy a Worker and still have that project on disk.
  • The cf CLI authenticated against your Cloudflare account (cf auth whoami).