Launching today

API Contract Guard

Launching today

Block breaking OpenAPI changes before merge

3 followers

Block breaking OpenAPI changes before merge

3 followers

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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.

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Launch tags:API•Developer Tools•GitHub

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Blocks.aiThe Control Plane & Network Layer For AI Agents

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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.

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22h ago

Installed it on a side repo last night and was surprised the check actually flagged a renamed query param our team had missed for weeks. No workflow file is a nice touch.

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3h ago