You know this feeling. A test passes locally, fails in CI, you rerun it, it passes again. Somewhere a third-party API was slow, or returned something unexpected, or was just briefly down. You move on, but it happens again next week.

And that's before you even get to the scenarios you can't test at all: rate limits, timeouts, malformed responses. You can't make a live API produce those on demand. So those code paths go untested.

Mocking solves both problems. Mokapi gives you a spec-validated mock server driven by your OpenAPI or AsyncAPI specs. Every response conforms to the contract. Every request gets validated. Your tests run against something you fully control.

The CI Setup

Mokapi runs in Docker during your test job. Your app points at it instead of the real API. That's the whole switch.