Your personal API testing agent. Save hours. Keep them.
Think Claude Code + Jupyter Notebook - built for API tests.
Offload tedious API testing to a local agent — autonomous for the boring parts, interactive when you want control. Your machine, your LLMs, your data, your schedule.
Download for freeAPI testing. One job, done well.
Applications are increasingly API-centric. Let WellTested generate and run tests for your APIs, then watch results stream in. Review, edit, and refine whenever you want — all in one place, all local.
QA & SDET
Move from manual, repetitive coding, clicking, and copying to agent-assisted test notebooks on your local machine.
Backend & Platform Engineers
Turn "curl in terminal" into living test notebooks. Don't wait for CI to find out what went wrong.
How WellTested fits your workflow
Install locally and import your OpenAPI document
Download WellTested and import your OpenAPI document. WellTested builds an internal model of your APIs.
Let AI explore autonomously
WellTested generates test case titles, human-readable step descriptions, and executable test code, then runs them against your testing environment.
Jump in and steer
See failing cases and logs in context. Edit step descriptions or adjust the code. WellTested learns from how you make tests pass.
Save and scale
Commit tests to Git or export them to Postman. Use them as living documentation and regression suites. The more you and WellTested build together, the faster future test creation becomes.
Get WellTested for free
Download WellTested today — free for a limited time.
Download nowNo sign-up. No credit card. Just download and run.
Why developers choose WellTested
Beyond single-endpoint testing
Agents orchestrate multi-API scenarios, discover edge cases you didn't anticipate, and validate error handling — all autonomously, all running locally.
Iterative — and easier over time
Like Jupyter notebooks, you see results immediately and refine on the fly. Agents learn from you: Spend ~10 minutes on the first few cases, ~1 minute on the next ones, and almost zero on the rest.
Works with real APIs, not just docs
From test design to working code. Agents debug against your local or staging environment and learn actual API behavior, even when documentation is incomplete or outdated.
Works where you work
Everything runs on your machine. Delegate your testing work to it — it's as safe as you doing it yourself. Use your own LLM or any provider you trust. Your data never leaves your infrastructure.
FAQ
Q: Does WellTested replace my existing test framework?
WellTested is where you design, run, and iterate on API tests on your local machine. It generates pytest code you can commit directly to your repo and integrate with CI pipelines. You can also export test collections to Postman if needed.
Q: Will it work with my stack?
Yes. WellTested supports any HTTP-based API. You bring your base URL, auth, and specs (where available); WellTested handles the rest.
Q: Is my data secure?
Completely. WellTested is a local installation, not a SaaS service. It supports self-hosted LLMs or any OpenAI-compatible API endpoint. Your tests, notebooks, API credentials, and responses never leave your machine. You're in full control.
Ready to level up your API testing?
Download WellTested today and experience autonomous, interactive API testing.
Download for freeNo sign-up. No credit card. Just download and run.