1.mswjs / msw
The industry standard for API mocking in JavaScript.
+525 stars
from 17,801 · score 6.27
Ranked by Attention Score: stars gained over the last 180 complete days
5 repositories by Attention Score · May 7, 2026 – Nov 2, 2026 (UTC)
The industry standard for API mocking in JavaScript.
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
Mockbin by Zuplo. Mock, Test, and View HTTP Requests and Responses
In-page HTTP controller for frontend development. Intercept, modify, and simulate API responses directly in the browser.