{"product_id":"api-contract-testing-skill-for-ai-agents-validate-openapi-3-x","title":"API Contract Testing Skill for AI Agents: Validate OpenAPI 3.x","description":"\u003ch3\u003eAPI Contract Testing Skill for AI Agents: Validate OpenAPI 3.x\u003c\/h3\u003e\n\n\u003cp\u003eThis skill validates an API contract against an OpenAPI 3.x specification, either in JSON or YAML format, and an optional manifest of expected endpoints. It ensures the API adheres to the spec it claims to fulfill.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this skill does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEnumerates operations from the OpenAPI spec, including paths and webhooks.\u003c\/li\u003e\n  \u003cli\u003eChecks internal consistency of the spec for unresolved references, duplicates, and missing responses.\u003c\/li\u003e\n  \u003cli\u003eCompares a manifest of expected endpoints against the spec offline.\u003c\/li\u003e\n  \u003cli\u003eIn live mode, probes each endpoint from the manifest over HTTP, comparing actual status with the expected one.\u003c\/li\u003e\n  \u003cli\u003eGenerates a machine-readable JSON report outlining endpoints count, missing endpoints from the spec, contract violations, conformances, and errors.\u003c\/li\u003e\n  \u003cli\u003eUtilizes exit codes 0\/1\/2 for integration into automated workflows.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho it is for\u003c\/h3\u003e\n\u003cp\u003eThis skill is designed for developers and engineering teams employing AI coding agents like Claude Code, Cursor, and Codex, who need to verify API specifications against actual implementations.\u003c\/p\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eValidating in-house API development to ensure adherence to original specifications.\u003c\/li\u003e\n  \u003cli\u003ePerforming regular checks during the development lifecycle to catch discrepancies early.\u003c\/li\u003e\n  \u003cli\u003eIntegrating into CI\/CD pipelines to automate API compliance checks pre-deployment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cp\u003eThis skill is developed using pure Python 3 standard library tools (argparse, json, pathlib, sys, urllib.request). It includes a minimal built-in YAML subset parser and does not rely on external libraries such as PyYAML or requests. The skill seamlessly interfaces with related tools such as `api-doc-generator` and `test-generator`, closing the loop for complete API documentation and testing workflows.\u003c\/p\u003e\n\n\u003cp\u003eFor authorised security testing, defensive research, and educational use only.\u003c\/p\u003e\n\u003c!-- mcpcart:static-blocks:start --\u003e\n\u003chr\u003e\n\u003ch3\u003eSource \u0026amp; Licence\u003c\/h3\u003e\n\u003cp\u003eThis package is built on open-source work published by \u003cstrong\u003ebestdeejay-design\u003c\/strong\u003e (\u003ca href=\"https:\/\/github.com\/bestdeejay-design\/agent-skills\" rel=\"nofollow noopener\" target=\"_blank\"\u003ebestdeejay-design\/agent-skills\u003c\/a\u003e) and distributed under \u003cstrong\u003eMIT\u003c\/strong\u003e. The original licence text and copyright notice are included in your download.\u003c\/p\u003e\n\u003cp\u003ePersonal and commercial use, modification and redistribution are permitted, provided the original copyright and licence notice are retained.\u003c\/p\u003e\n\u003cp\u003eYour purchase covers curation, licence verification, packaging, documentation and instant delivery. It does not grant exclusive rights to the underlying open-source code, which remains available under its original licence.\u003c\/p\u003e\n\u003ch3\u003eDelivery \u0026amp; Support\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDelivery:\u003c\/strong\u003e instant — a secure download link is emailed to you as soon as payment is confirmed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e ZIP archive containing the skill files, documentation and the original licence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport:\u003c\/strong\u003e \u003ca href=\"mailto:support@mcpcart.com\"\u003esupport@mcpcart.com\u003c\/a\u003e — we aim to reply within 2 business days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpdates:\u003c\/strong\u003e updates are included only where stated on this page.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRefunds\u003c\/h3\u003e\n\u003cp\u003eThis is a digital product delivered immediately after purchase. By completing your order you request immediate delivery and acknowledge that, once the download has been accessed, the statutory right to cancel no longer applies to the extent permitted by law. Refund requests are handled in accordance with our published Refund Policy.\u003c\/p\u003e\n\u003cp style=\"font-size:0.85em;color:#666;\"\u003eClaude, Codex, Gemini and Cursor are trademarks of their respective owners. MCP Cart is an independent marketplace and is not affiliated with, endorsed by, or sponsored by any of them. Compatibility references describe interoperability only.\u003c\/p\u003e\n\u003c!-- mcpcart:static-blocks:end --\u003e","brand":"MCP Cart","offers":[{"title":"Default Title","offer_id":52830841176375,"sku":"MCP-BESTDEEJAY-DESIGN-AGENT-SKILLS-API-CONTRACT-TESTING","price":10.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/3950\/4951\/files\/HdOm5WMpRr2ddDkfJGtqk_6e87a16644314fafbb85e404c13c1a08.jpg?v=1786626228","url":"https:\/\/mcpcart.com\/products\/api-contract-testing-skill-for-ai-agents-validate-openapi-3-x","provider":"SPF PRO","version":"1.0","type":"link"}