{"product_id":"master-api-interface-design-ai-skills-for-codex-more","title":"Master API \u0026 Interface Design: AI Skills for Codex \u0026 More","description":"\u003ch3\u003eMaster API \u0026amp; Interface Design: AI Skills for Codex \u0026amp; More\u003c\/h3\u003e\n\n\u003cp\u003eThis AI agent skill assists developers and teams in designing stable and well-documented APIs and interfaces. It supports creating REST or GraphQL endpoints, defining type contracts between modules, and establishing boundaries between frontend and backend components.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this skill does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGuides the creation of stable API and interface designs that are hard to misuse.\u003c\/li\u003e\n  \u003cli\u003eProvides best practices for defining module boundaries or contracts between teams.\u003c\/li\u003e\n  \u003cli\u003eAssists in establishing a database schema that aligns with API shape requirements.\u003c\/li\u003e\n  \u003cli\u003eSupports changing existing public interfaces while maintaining their integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho it is for\u003c\/h3\u003e\n\u003cp\u003eThis skill is intended for developers and development teams using AI coding agents such as Claude Code, Cursor, and Codex. It is particularly useful for those involved in API design and system architecture planning.\u003c\/p\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCreating new API endpoints for an application with clear contracting and minimal ambiguity.\u003c\/li\u003e\n  \u003cli\u003eEstablishing robust module boundaries to organize larger codebases effectively.\u003c\/li\u003e\n  \u003cli\u003eDefining component properties within frontend projects, ensuring consistent communication protocols.\u003c\/li\u003e\n  \u003cli\u003ePlanning for potential deprecation of functionalities with minimal impact on current users.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUtilizes agent-skills and aiapplication tools to enhance API and interface design capabilities.\u003c\/li\u003e\n  \u003cli\u003eDesigned to work seamlessly with AI coding agents like Claude Code, Cursor, and Codex.\u003c\/li\u003e\n\u003c\/ul\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\u003eaddyosmani\u003c\/strong\u003e (\u003ca href=\"https:\/\/github.com\/addyosmani\/agent-skills\" rel=\"nofollow noopener\" target=\"_blank\"\u003eaddyosmani\/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":52795676557623,"sku":"MCP-ADDYOSMANI-AGENT-SKILLS-API-AND-INTERFACE-DESIGN","price":2.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/3950\/4951\/files\/fZXy4t81BteQ5j6H2Ozhq_79f04ff6bbcb4cdeb79a1729989ce8f8.jpg?v=1786011269","url":"https:\/\/mcpcart.com\/products\/master-api-interface-design-ai-skills-for-codex-more","provider":"SPF PRO","version":"1.0","type":"link"}