Read docs Updated 2026-06-17
What is Mocky?
Mocky is a service for generating HTTPS endpoints that return user-supplied JSON data to simulate REST API behavior.
It is useful for developers and QA teams who need stable, configurable mock responses while building or testing client applications.
What you can build with Mocky
Frontend development without backend
Developers define sample JSON responses to let frontend teams build and iterate on UIs while the real API is still being implemented.
Integration testing of third-party clients
Teams create stable mock endpoints to test how their applications handle various API response shapes, error codes, and data variations.
API contract prototyping
Quickly share generated HTTPS URLs with stakeholders to demonstrate expected response formats before any server code is written.
Get started with Mocky
- 1Open the Mocky website in a browser
- 2Paste or write the desired JSON payload
- 3Optionally set status code, headers, or delay
- 4Click generate to receive a unique HTTPS URL
- 5Copy the URL into your application or tests
Mocky: pros & cons
Pros
- +No account or API key required
- +Instant HTTPS endpoint generation
- +Simple interface focused on JSON responses
Cons
- –Mocks are publicly accessible via URL
- –No built-in persistence or versioning of mocks
- –Limited to static responses only
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Frequently asked questions
Mocky is a free service that generates HTTPS URLs returning user-defined JSON payloads for use in development and testing.
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