Free Mock API for Custom JSON Data

Free Mock API
for Custom JSON Data

Need a free mock REST API for your own JSON data?
Enter your response body below and click "Generate Now" to instantly get your custom API URL.

// "response" body, what you expect from your custom API

Request method type: GET POST PUT PATCH DELETE

Why use it

Paste the exact response body your frontend expects — objects, arrays, nested data, all supported.

Choose GET, POST, PUT, PATCH, or DELETE so your mock behaves like the real API you are building against.

Get a permanent-style link in seconds — drop it into fetch calls, Postman, or your app config.

How it works

Enter the response body you want your mock API to return. Use Prettify to format messy JSON.

Select the HTTP method your client will call — GET for reads, POST for creates, and so on.

Click Generate Now, copy your unique URL, and start fetching real JSON from your custom endpoint.

FAQ

How long does a custom API URL last?

Your endpoint stays active for 90 days. Check the x-expires-on response header for the exact expiry date.

Which HTTP methods can I use?

GET, POST, PUT, PATCH, and DELETE — pick the method when you generate the URL.

Is there a payload size limit?

Yes. JSON response bodies can be up to 300 KB.

Can I update the response after creating a URL?

Each URL is tied to the JSON and method you submitted. To change the response, generate a new endpoint with updated data.

Do I need a backend?

No. DummyJSON hosts the endpoint for you. Share the URL with your frontend, mobile app, or API tests and it returns your JSON instantly.