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API Contract Guard
Block breaking OpenAPI changes before merge
A GitHub App that checks OpenAPI 3.x JSON or YAML contracts on every pull request and posts a native GitHub Check. It catches removed endpoints, responses, required inputs, and incompatible schema changes before merge—without adding a workflow file. Founding Starter offer: £1 for the first month, then £19/month.
I built API Contract Guard after seeing API compatibility checks treated as a manual release task. Install the GitHub App, open a pull request that changes an OpenAPI file, and the result appears directly in GitHub Checks—no workflow file or sales call. There is a live proof pull request and a £1 first-month founding offer. I would especially value feedback from teams maintaining public or internal APIs.
About API Contract Guard on Product Hunt
“Block breaking OpenAPI changes before merge”
API Contract Guard was submitted on Product Hunt and earned 9 upvotes and 7 comments, placing #158 on the daily leaderboard. A GitHub App that checks OpenAPI 3.x JSON or YAML contracts on every pull request and posts a native GitHub Check. It catches removed endpoints, responses, required inputs, and incompatible schema changes before merge—without adding a workflow file. Founding Starter offer: £1 for the first month, then £19/month.
On the analytics side, API Contract Guard competes within API, Developer Tools and GitHub — topics that collectively have 656k followers on Product Hunt. The dashboard above tracks how API Contract Guard performed against the three products that launched closest to it on the same day.
Who hunted API Contract Guard?
API Contract Guard was hunted by Patrick Kenneally. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of API Contract Guard including community comment highlights and product details, visit the product overview.
Patrick Kenneally