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Api Contract Testing

Checked
secondsky·vlatest·testing·MIT

Helps with API, testing as part of testing, debugging, and quality assurance workflows.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add secondsky/claude-skills --skill api-contract-testing -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

secondsky

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Only contacts known or declared hosts: json-schema.org.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

    Hosts contacted

    json-schema.orgstandards

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned secondsky/claude-skills at 8837836131.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
8837836131
Manifest
plugins/api-contract-testing/skills/api-contract-testing/SKILL.md
Scanned
4 files, 821 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill enables AI agents to perform contract testing against API endpoints, ensuring that service implementations align with defined interface specifications before deployment. It validates request and response structures to prevent integration failures caused by breaking changes in upstream or downstream services.

When to use it

  • Pre-deployment validation: Run tests immediately before pushing code changes to catch regressions early.
  • Microservices integration: Verify compatibility when connecting new microservices to existing legacy systems.
  • CI/CD pipelines: Integrate automated contract checks into build workflows to block non-compliant builds.
  • Third-party API consumption: Ensure external vendor APIs meet expected data formats and behavior standards.

Key capabilities

  • Validates request payloads against JSON Schema definitions
  • Checks response structures for required fields and types
  • Detects breaking changes in API contracts automatically
  • Supports both synchronous and asynchronous endpoint testing

Example prompts

  • "Run contract tests on the /users endpoint to verify it matches our latest OpenAPI specification."
  • "Check if the payment service API has any breaking changes compared to the registered contract."
  • "Validate that the new authentication response includes all required fields defined in the schema."

Tips & gotchas

Ensure your API contracts are properly versioned and stored in an accessible location before running tests. The skill requires valid JSON Schema definitions; incomplete or malformed schemas will cause validation failures even if the API works correctly.