🔌Mock API Response Generator

Generate complete mock REST API responses with headers and status codes.

HTTP 200•Content-Type: application/jsonX-Request-Id: req_abc123

About Mock API Response Generator

Build realistic mock REST API responses complete with HTTP status codes, response headers, and JSON body payloads. Select from common response patterns (success, paginated list, error, validation failure) or customise your own. Copy as a raw HTTP response or as a JavaScript fetch mock for use in tests.

How to Use Mock API Response Generator

1
Choose a response pattern
Select a common HTTP response type from the dropdown to load a template.
2
Edit the response body
Customise the JSON payload, status code, and headers to match your API spec.
3
Copy the mock
Copy as a raw response or as a JavaScript fetch mock for use in your test suite.

Common Use Cases

Mocking API responses for frontend development without a backend
Creating test stubs for unit and integration tests
Documenting API response formats with realistic examples
Generating error response templates for error-handling UI development

Frequently Asked Questions

What response patterns are available?

Pre-built patterns include 200 Success, 201 Created, 400 Bad Request with validation errors, 401 Unauthorized, 404 Not Found, 422 Unprocessable Entity, and 500 Internal Server Error.

Can I customise the response body?

Yes — edit the JSON body directly in the editor to match your API's exact response schema before copying.