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Mock API Cloudflare Worker

Create a test JSON endpoint instantly. · Runs on the Cloudflare edge.

What it does. Instantly creates a real HTTP endpoint that returns exactly the body, status code and Content-Type you define here. Use it to build your frontend before the backend exists, simulate a 404/500 error, or share an example response. The endpoint accepts any method, has open CORS and lives for 24 hours.
Response to return
Your endpoint
1) Configure the response on the left. 2) Click “Create endpoint”. 3) Copy the URL and call it from your app, your tests or the “Test it” button. It lives for 24 hours.

What is Mock API?

NewKit's mock API creates, in one click, a real HTTP-accessible endpoint that returns exactly the body, status code and Content-Type you configure. Instead of spinning up a test server, you define the response and get a URL ready to use from your frontend, your tests or any tool.

It is ideal for building the UI before the backend exists, reproducing a specific response (including a 500 error or a 404) or sharing an example with your team. The endpoint is served from the Cloudflare edge with open CORS, so you can call it from any origin, and it lives for 24 hours.

Frequently asked questions

Is it free?

Yes, all NewKit tools are completely free.

How does it work without installing anything?

The tool runs on Cloudflare Workers at the edge: your browser makes a lightweight request to our server, which performs the network lookup and returns the result. There is nothing to configure.

Is there a usage limit?

To keep the service free and within Cloudflare's free tier, we apply a reasonable daily request limit. For normal use you will not notice it.