api-contract-testing

api-contract-testing is a plugin for Claude Code from pnakhat/qa-ai-repo. Its manifest loads nothing; the 1 skill, 1 agent it bundles cost 171 tokens per session together, scanned A, original, MIT.

A set of tests for checking that changes to web and service APIs do not break their users. An API contract is an agreed description of requests, responses, and messages between software systems.

In plain words
What is it for?
Use it with REST, GraphQL, and event or message APIs. It supports consumer-driven contracts, OpenAPI specification checks, compatibility diffs, and deployment checks in CI.
Why use it?
It detects incompatible changes before release instead of after another service fails. Versioned contracts, provider checks, and CI gates can stop a release that consumers cannot use.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it with REST, GraphQL, and event or message APIs. It supports consumer-driven contracts, OpenAPI specification checks, compatibility diffs, and deployment checks in CI.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add pnakhat/qa-ai-repo
/plugin install api-contract-testing
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/pnakhat/qa-ai-repo

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for api-contract-testing

README.md
[![agentmods](https://agentmods.dev/badge/plugins/pnakhat/qa-ai-repo/api-contract-testing/github.svg)](https://agentmods.dev/plugins/pnakhat/qa-ai-repo/api-contract-testing)
Your own site
<a href="https://agentmods.dev/plugins/pnakhat/qa-ai-repo/api-contract-testing"><img src="https://agentmods.dev/badge/plugins/pnakhat/qa-ai-repo/api-contract-testing/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for api-contract-testing

Your own site · 80×15
<a href="https://agentmods.dev/plugins/pnakhat/qa-ai-repo/api-contract-testing"><img src="https://agentmods.dev/badge/plugins/pnakhat/qa-ai-repo/api-contract-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill, 1 agent cost 171 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

api-contract-testing scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

api-contract-testing/.claude-plugin/plugin.json · 18 lines

What it actually says

{
  "name": "api-contract-testing",
  "displayName": "API Contract Testing",
  "version": "0.10.0",
  "description": "Catch breaking API changes before they ship — consumer-driven contracts (Pact) and spec-first validation (OpenAPI/Spectral/Schemathesis/oasdiff), across REST, GraphQL, and event/message boundaries. Enforces guardrails that reject exact-value matching in favour of type/shape matchers, require every pact and spec to carry a version + git sha, replace shared fixtures with per-interaction provider states, and treat any backward-incompatible change as a versioned breaking change. Wires provider verification, breaking-change diffs, and blocking can-i-deploy / record-deployment gates into CI so an incompatible release is stopped, not merely reported.",
  "author": {
    "name": "pnakhat"
  },
  "homepage": "https://github.com/pnakhat/qa-ai-repo/tree/main/api-contract-testing",
  "repository": "https://github.com/pnakhat/qa-ai-repo",
  "license": "MIT",
  "keywords": [
    "qa",
    "testing",
    "api-contract-testing"
  ]
}
Contents

What it installs

The manifest is a name and a version. 1 skill, 1 agent travel with it, and installing the plugin installs all of them — 171 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago Changed 178e62437cc1
  2. 11d ago First seen · 18 lines scan A 170847a0f450

Subscribe to this mod's changes

api-contract-testing is a plugin published in the GitHub repository pnakhat/qa-ai-repo (2 stars, last pushed 10d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-06.