Observed Signal · Jun 7, 2026 · Technical Release · Source: DEV Community · Impact: 1/5 · Sentiment: Positive
Use Mokapi to Mock Third‑Party APIs in CI
A DEV.to article (published 2026-06-07) explains why test suites should not rely on third-party APIs and demonstrates using Mokapi — a spec-validated mock server driven by OpenAPI/AsyncAPI — to run reliable, contract-validated tests in CI. The piece shows a GitHub Actions/Docker setup that starts Mokapi from repo-stored specs, runs tests against the mock server, and stops the container. It also highlights Mokapi's JavaScript runtime API for simulating delays, errors, rate limits, and other edge cases on demand, and describes how Mokapi validates requests/responses against the API spec and exposes a dashboard for debugging handler activity.
Practical developer guide for running spec-driven mock APIs in CI; useful for engineering teams but not industry-shifting for AdTech/MarTech.
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Key Takeaways & Evidence Grounding
- Mokapi is a spec-validated mock server driven by OpenAPI and AsyncAPI specifications.
- The article demonstrates running Mokapi in Docker inside CI (GitHub Actions) and pointing the application at the mock server instead of the live API.
- Mokapi provides a JavaScript API to simulate runtime behaviours (delays, 500 errors, 429 rate limits) without restarting the server.
- Mokapi validates every request and response against the API contract and offers a dashboard showing HTTP requests and the JavaScript handlers that ran.
- The article was published on DEV Community on 2026-06-07 by author Maesi.
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