API Contract

Never ship a breaking API change without knowing it first.

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Trusted trust tier

This skill has significant install counts or stars from a credible organisation.

What is api-contract?

api-contract compares two OpenAPI or GraphQL schemas and classifies every change as breaking, potentially-breaking, or safe. It generates a human-readable changelog and a semver bump recommendation. Plug it into CI to gate releases on breaking-change detection.

Best for

api-contract is ideal for developers, teams, and agents who need to never ship a breaking api change without knowing it first.. Whether you're automating workflows, improving code quality, or extending functionality, this claude skill integrates directly into Claude Code.

Why use api-contract?

Integrates seamlessly with Claude Code
From a trusted source
Battle-tested by 700 developers
Open ecosystem standard — works across agents

Installs700

Installation and usage

Getting started with api-contract is straightforward. Follow the steps below to install this claude skill into your Claude Code environment and start using it immediately.

How to install

Make sure you have Claude Code installed. Run claude in your terminal — if it opens, you're ready.

Visit the skills.sh page for this tool and follow the install instructions. Most skills install with a single command run inside Claude Code.

After installing, type / inside Claude Code to see your installed skills and invoke them by name.

Go to install page →