Does this skill support tools other than Pact?

Yes, it includes guidance for OpenAPI validation, JSON Schema, REST Assured, and Dredd to ensure comprehensive coverage across different development ecosystems.

Can I use this with my existing CI/CD pipelines?

Absolutely. The skill provides implementation patterns for running tests in CI and publishing verification results to a Pact Broker for automated deployment gates.

What is the benefit of contract testing over integration testing?

Contract testing is significantly faster and more stable than integration testing because it tests service interactions in isolation, removing the need for complex environment setups and reducing 'flaky' test results.

How does Claude Code assist with contract testing specifically?

Claude uses this skill to generate boilerplate consumer tests, setup provider verification logic, and configure schema validation middleware tailored specifically to your project's codebase and specifications.

API Contract Testing

Name: API Contract Testing
Author: secondsky

bysecondsky

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Security & Testing

Verifies API reliability between microservices using consumer-driven contracts and schema validation to prevent breaking changes.

This skill empowers developers to implement robust API contract testing within their development workflows, ensuring seamless communication between service consumers and providers. By leveraging industry-standard tools like Pact and OpenAPI specifications, it identifies integration issues early in the lifecycle without the overhead of full end-to-end integration tests. It provides production-ready templates for consumer-driven testing, provider verification, and schema validation across multiple languages, making it an essential tool for teams managing complex microservice architectures and evolving API ecosystems.

Key Features

0121 GitHub stars

02OpenAPI and JSON Schema middleware validation

03Consumer-driven contract testing with Pact (TypeScript)

04Best practice guidance for flexible matchers and versioning

05Multi-language implementation patterns for Express, Python, and Java

06Automated provider verification and state management

Use Cases

01Validating API implementations against OpenAPI specifications automatically

02Preventing breaking changes in microservice-to-microservice communication

03Testing service interactions in isolation without deploying the entire system

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add secondsky/claude-skills api-contract-testing

For use in Claude.ai and ChatGPT

Download Skill