
Fake REST API with chaos controls: force any status code, add latency, or a failure rate.
flaky API is a free Test Data API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Real data at real URLs, like every other fake API. The difference: you decide how it behaves. Force a 503, add latency, or make a third of requests fail — from the query string.
Details from flakyapi.dev.

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The flaky API is provided by flaky (flakyapi.dev). Real data at real URLs, like every other fake API. The difference: you decide how it behaves. Force a 503, add latency, or make a third of requests fail — from the query string.
Yes. The flaky API is listed in the Test Data category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The flaky API requires no authentication, so you can start making requests without signing up.
Yes. The flaky API supports CORS, so front-end JavaScript can call it directly.
Yes. The flaky API is served over HTTPS, so it's safe to use in production.