Coming soon
Catch breaking API changes before your users do.
A drop-in GitHub check for your OpenAPI spec — flags the change that breaks callers on the pull request, not in production.
The review that misses the break
A spec change that looks tidy in review can remove a field, narrow a type or rename a parameter — and every caller breaks after deploy. Diffing specs by eye does not catch it reliably.
- Runs on the pull request and comments with exactly what breaks and who it breaks.
- Distinguishes a breaking change from an additive one, so it is not noise.
- Installs as a GitHub App on one repository — no pipeline to write.
- Free to run on a small repo, with a paid tier only when you need more.
Who it is for
API teams and small product groups who treat their OpenAPI spec as the contract with their callers, and who want a check rather than a convention.
Free where it counts
The single-repo check is free. Teams pay only when they want it across many repositories, with policy and history.
Frequently asked questions
How is this different from a spec diff tool?
It is the hosted, zero-config version: install it and every pull request gets checked, without wiring a CLI into your own pipeline.
Does it need my source code?
No — it works from your OpenAPI spec, which your CI already publishes.
Is it free?
The check on one repository is free. Multi-repo plans come with the product.
When does the beta open?
Soon. Waitlist members get the install link first.