AI mock API generator
Updated Free mock REST & WebSocket APIs
Tell MockFox what your API does. The AI designs resources, relationships, custom endpoints and realistic sample data, then you publish it to a live URL with one click.
Tips for better mocks
- Name the entities and how they relate: “customers have many orders; orders have line items”.
- Ask for the edge cases you need to test: empty lists, 401s, 404s, 429 rate limits, slow endpoints.
- Say how much data you want: “25 products across 4 categories”.
- For realtime features, ask for a WebSocket that pushes events — it becomes a scripted WebSocket mock.
Why mock an API?
Front-end and mobile teams can build against a stable contract while the backend is still in progress, tests stop depending on flaky third-party services, and demos never break because a staging server is down.
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Frequently asked questions
Is MockFox free?
Yes. No sign-up, no API key. Fair-use rate limits keep it fast for everyone, and clearly labeled sponsors pay for the servers.
What can I ask for?
Resources and how they relate, custom endpoints, error cases, slow responses and WebSocket behaviour — e.g. “a booking API that returns 409 when a slot is taken”.
Is the data real?
No. The AI invents realistic, consistent sample data — names, emails on example.com, prices, dates — that's safe to use in demos and tests.
Can I edit the result?
Yes. The generated definition opens in the JSON editor so you can tweak anything before publishing.
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