Best AI for API testing

Write requests, generate tests and debug failing endpoints.

This featured slot is available to tool makers who fit this use case. Clearly labeled, always separate from our picks.

Our picks

1. Postman
API platform for building and testing requests, with the Postbot AI assistant.
Verdict: Top pick if your team already uses Postman: Postbot writes tests and docs from your requests.
2. Cursor
AI-first code editor (VS Code fork) with chat, inline edits and an agent mode.
Verdict: Generates and fixes test suites (pytest, Jest, etc.) right next to your API code.
3. Claude
Anthropic's AI assistant, strong at long documents, writing and code.
Verdict: Paste an OpenAPI spec or a failing response and get test cases and edge cases you missed.
4. ChatGPT
OpenAI's general-purpose AI assistant with chat, images, voice and search.
Verdict: Good for quick test scripts and mock data; can run Python to try things out.
5. Bruno
Open-source, offline API client that stores collections as plain files in git.
Verdict: Not AI itself, but its plain-file collections are easy for AI editors to read and write. Pick it to stay offline and git-native.

Picks are editorial and not paid. Pricing and features change often — check each official site.