Generate API Test Cases using AI
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Trusted by 300,000+ developers from Fortune 500 companies.
Write API tests automatically
Manual test scripting slows teams down. Requestly’s Test Authoring Agent writes clean, reliable API tests for any response, directly inside your existing Requestly workflow.
Turn any API request into ready-to-run tests
Faster debugging
Always stays in-context
Natural language instructions
Collaboration & 1-Click Sharing
Tests you can generate
Status code checks
Verify exact status codes or status categories (2xx, 4xx, 5xx) with precise, readable assertions. Ensure your API behaves correctly under both success and error scenarios.
JSON validity & structure
Automatically confirm that the response contains valid JSON. Catch malformed responses before they break client-side logic.
Schema validation (AJV)
Validate entire JSON structures using auto-generated AJV schemas. Guarantee consistent API contracts across every environment.
Field-level assertions
Assert existence and correctness of specific fields in the response. Perfect for validating key data like id, email, status, and nested objects.
Header assertions
Check presence and accuracy of essential headers like Content-Type or Authorization. Ensure your API communicates the right metadata every time.
Array and list validations
Confirm array lengths, ensure items match expected types, and validate list contents. Ideal for endpoints returning collections, lists, or paginated data.
Built for teams
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Enterprise-ready security and compliance
Loved by developers around the World
Developers around the world trust us to simplify debugging, speed up workflows, and make development more efficient.
Requestly is the first API client that has genuinely replaced Postman for me. Everything runs locally, so my API data never has to go through a cloud server. There’s no mandatory login, no unnecessary bloat, and no pressure to upgrade just to keep using the same workflow. It feels faster, simpler, and much more aligned with how developers actually want to work.
Postman stopped fitting the way our team works. We wanted our API collections in Git, not locked inside another tool. Requestly stores everything as plain JSON files in a local directory, which gives us full control over versioning, reviews, and collaboration.
My absolute favorite web debugging proxy and API client. I use it nearly every day for work to modify HTTP requests, test and mock API calls, inject JS snippets into sites, etc. The Requestly team is incredible — I once submitted a bug report and it was closed out within an hour. Also just kind, passionate people. I can't recommend Requestly enough.
Absolutely love the API Client feature! It’s like Postman, but better integrated into my daily workflow. Modifying API responses directly from the same tool I use for debugging is such a time-saver. Great job, Requestly team, for constantly innovating!
We recently migrated from Postman to Requestly’s API Client, and it has been a great experience. The ability to store collections locally, keep them in Git, and work with simple JSON files made the transition seamless and much more developer-friendly.
Requestly is an incredibly useful tool for developers working on a large team with multiple staging envs, or numerous app endpoints for various APIs in a local environment. The Sessions feature is especially useful for documenting solutions or sharing with others since it captures the relevant network traffic, and screen recording enables others to easily reproduce. Requestly combines all the power of complicated tools like Charles Proxy and Postman in one app/chrome extension. I highly recommend giving it a try if you haven't already–it will make your dev work so much easier. (Summarized)
Requestly is user-friendly, brilliant and easy-to-use. I use it on an daily basis and it makes my work easier. After using other tools like Charles - Requestly is a nice new breath of air that I highly vouch for. Apart from the tool being amazing - the support from the Requestly team is phenomenal with them always going above and beyond for their clients.
App works as expected! Ran into some small issues while creating the rules but the support team was able to help and overcome those.
