relay

Relay helps API providers deliver verified integration updates to their customers. It combines GPT-6 Astra’s code reasoning and browser interaction to repair client code and check that the affected user workflow still works. API changes leave customers responsible for finding affected integrations, updating them, and checking the result. A passing build or successful HTTP response can still hide a broken product experience. Relay compares API contracts, identifies potentially affected client code, and gives Astra an isolated repair workspace. Astra reproduces the failure, edits the adapter, checks compatibility, and exercises the rebuilt application. The output is a code change with screenshots and independent verification evidence, ready to package into a draft PR for developer review. Our working demo deliberately changes our image API wrapper from image_url to assets[]. The original client passes on V1, fails on V2, and the repaired client passes on V2. Astra verifies generating, previewing, saving, and reopening the same image. We have also produced a real draft PR containing the verified candidate and linked evidence. The project was inspired by YC’s “Self-Maintaining APIs” request for startups: turning provider changes into customer-code updates and reviewable pull requests. https://www.ycombinator.com/rfs#self-maintaining-apis