validating-api-contracts
This skill validates API contracts using consumer-driven testing and OpenAPI validation. It leverages Pact for consumer-driven contract testing, ensuring that API providers adhere to the expectations of their consumers. It also validates APIs against OpenAPI specifications to guarantee compliance and identify breaking changes. Use this skill when the user asks to generate contract tests, validate API responses, check backward compatibility, or validate requests/responses using the terms "contract-test", "ct", "Pact", "OpenAPI validation", or "consumer-driven contract testing".
Best use case
validating-api-contracts is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
This skill validates API contracts using consumer-driven testing and OpenAPI validation. It leverages Pact for consumer-driven contract testing, ensuring that API providers adhere to the expectations of their consumers. It also validates APIs against OpenAPI specifications to guarantee compliance and identify breaking changes. Use this skill when the user asks to generate contract tests, validate API responses, check backward compatibility, or validate requests/responses using the terms "contract-test", "ct", "Pact", "OpenAPI validation", or "consumer-driven contract testing".
Teams using validating-api-contracts should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/contract-test-validator/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How validating-api-contracts Compares
| Feature / Agent | validating-api-contracts | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
This skill validates API contracts using consumer-driven testing and OpenAPI validation. It leverages Pact for consumer-driven contract testing, ensuring that API providers adhere to the expectations of their consumers. It also validates APIs against OpenAPI specifications to guarantee compliance and identify breaking changes. Use this skill when the user asks to generate contract tests, validate API responses, check backward compatibility, or validate requests/responses using the terms "contract-test", "ct", "Pact", "OpenAPI validation", or "consumer-driven contract testing".
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
## Overview This skill enables Claude to generate and validate API contracts, ensuring compatibility between API providers and consumers. It uses Pact for consumer-driven contract testing and OpenAPI validation for specification compliance. ## How It Works 1. **Generating Contract Tests**: Claude creates Pact consumer tests based on API usage, generating provider verification tests and building OpenAPI contract validators. 2. **Validating Contracts**: The skill verifies if API responses match the defined contracts. 3. **Checking Compatibility**: It checks for backward compatibility to identify breaking changes in the API. ## When to Use This Skill This skill activates when you need to: - Generate contract tests for an API. - Validate API responses against existing contracts. - Identify breaking changes in an API. ## Examples ### Example 1: Generating Pact Contracts User request: "Generate contract tests for my API using Pact." The skill will: 1. Analyze the API and generate Pact consumer contracts. 2. Create provider verification tests based on the contracts. ### Example 2: Validating an OpenAPI Specification User request: "Validate my API against the OpenAPI specification." The skill will: 1. Validate the API against the provided OpenAPI specification. 2. Report any discrepancies or violations of the specification. ## Best Practices - **Clarity**: Be specific when requesting contract generation or validation, providing relevant API details. - **Completeness**: Ensure that your OpenAPI specifications are up-to-date for accurate validation. - **Context**: Provide context about the consumer and provider roles when using Pact. ## Integration This skill can be integrated with other testing and deployment tools in the Claude Code ecosystem to automate contract verification as part of a CI/CD pipeline.
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