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8 skills · 5 publishers

Claude skills for API design

REST, GraphQL and OpenAPI skills for APIs that are consistent, versioned and easy to integrate.

The best Claude skills for API design

  1. 1

    API Design Principles

    Seth Hobson 42k

    Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API specifications, or establishing…

    npx skills add wshobson/agents --skill api-design-principles
  2. 2

    Openapi Spec Generation

    Seth Hobson 42k

    Generate and maintain OpenAPI 3.1 specifications from code, design-first specs, and validation patterns. Use when creating API documentation, generating SDKs, or ensuring API contract compliance.

    npx skills add wshobson/agents --skill openapi-spec-generation
  3. 3

    Write Swift

    Emil Kowalski 54k

    How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics…

    npx skills add emilkowalski/skills --skill write-swift

All 8 API design skills

8 skills

API Design Principles

Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers. Use when designing new APIs, reviewing API…

Backend & APIsSeth Hobson42k

Openapi Spec Generation

Generate and maintain OpenAPI 3.1 specifications from code, design-first specs, and validation patterns. Use when creating API documentation, generating SDKs, or ensuring API…

Backend & APIsSeth Hobson42k

Write Swift

How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups)…

MobileEmil Kowalski54k

Nodejs Backend Patterns

Build production-ready Node.js backend services with Express/Fastify, implementing middleware patterns, error handling, authentication, database integration, and API design best…

Backend & APIsSeth Hobson42k

Python Project Structure

Python project organization, module architecture, and public API design. Use when setting up new projects, organizing modules, defining public interfaces with __all__, or planning…

Backend & APIsSeth Hobson42k

Supabase

Use when doing ANY task involving Supabase. Triggers: Supabase products (Database, Auth, Edge Functions, Realtime, Storage, Vectors, Cron, Queues); client libraries and SSR…

Data & DatabasesSupabase3k

Sharp Edges

Identifies error-prone APIs, dangerous configurations, and footgun designs that enable security mistakes. Use when reviewing API designs, configuration schemas, cryptographic…

SecurityTrail of Bits8k

Azure Aigateway

Configure Azure API Management as an AI Gateway for AI models, MCP tools, and agents. WHEN: semantic caching, token limit, content safety, load balancing, AI model governance, MCP…

Cloud & DevOpsMicrosoft1.6k

About these API design skills

This page collects every skill in the directory that covers API design: 8 from 5 publishers, including official skills from Supabase, Trail of Bits and Microsoft. Each one links back to its original GitHub repository, so you always get the author's latest version. They span Backend & APIs, Mobile, Data & Databases and Cloud & DevOps.

Publishers on this page

Questions about Claude skills for API design

What is the best Claude skill for API design?

Our top pick is API Design Principles by Seth Hobson, from a repository with 42k GitHub stars. Openapi Spec Generation and Write Swift round out the top three. Skills are ranked by the popularity of their source repository, with hand-picked favorites first, and official skills from Supabase, Trail of Bits and Microsoft carry a badge.

How do I install a Claude skill for API design?

Open a skill's page and run its install command in your project folder, for example npx skills add wshobson/agents --skill api-design-principles. You can also download any skill as a ZIP and add it to Claude Code or upload it to the Claude app.

The install guide walks through every method.

Are Claude skills for API design free?

Yes. All 8 skills on this page are open source and free to use, and most are MIT licensed. You need a Claude plan that supports skills, or a coding agent that reads SKILL.md files.

Do these skills work in Claude Code and the Claude app?

Yes. A skill is a folder with a SKILL.md file, and the same folder works in Claude Code, the Claude desktop and web apps (on paid plans with code execution turned on) and the Claude API. Many also work in other agents that support the Agent Skills format, such as Cursor and OpenAI Codex. Skills that ship scripts need somewhere Claude can run code.

How many Claude skills for API design are there?

We list 8 from 5 publishers, last updated November 4, 2026. The list refreshes from GitHub as publishers release new skills.

Related use cases

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