API Contract

Never ship a breaking API change without knowing it first.

Install → View source

Trusted trust tier

This skill has meaningful adoption or reputation signals, but still deserves a quick review.

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

1
Make sure you have Claude Code installed. Run claude in your terminal — if it opens, you're ready.
2
Open the source page for this tool and follow the install instructions. Most skills install with a single command run inside Claude Code.
3
After installing, type / inside Claude Code to see your installed skills and invoke them by name.
Go to install page →