Best OpenAPI specifications skills for Claude Code, Codex and other agents.

Turns an API description, such as an OpenAPI file or a Postman collection, into a connector plugin for ToolJet's marketplace and checks it with the repo's validator.

ToolJet/ToolJet

Find, evaluate, and download common purchasable CAD parts from step.parts, including named off-the-shelf actuators, servos, motors, electronics boards, connectors, screws, bolts, nuts, washers…

earthtojake/text-to-cad

Designs REST and GraphQL APIs from resource modeling to an OpenAPI 3.1 contract, with versioning, pagination and RFC 7807 error handling.

Jeffallan/claude-skills

Turns an OpenAPI or Swagger spec into an MCP server with the mcp-use TypeScript SDK, mapping each operation to a tool, wiring auth, testing and deploying.

mcp-use/mcp-use

A skill your agent uses when the user mentions Yaak, a Yaak workspace, or the yaak command, or asks to call, hit, or smoke test HTTP/REST endpoints, save or organize API requests for reuse or manual…

mountain-loop/yaak

Scalar's design system — design tokens, theming (@scalar/themes), CSS variables, and the @scalar/components library.

scalar/scalar

Explore and understand codebases using SocratiCode semantic search, dependency graphs, and context artifacts.

giancarloerra/SocratiCode

Reviews or designs an HTTP/JSON API's endpoints, auth, pagination, versioning and deprecations, guarding against inventing a bespoke interface or silently breaking consumers.

AmazingAng/old-coder

Zod schema validation best practices for type safety, parsing, and error handling.

jasonjgardner/blockbench-mcp-plugin

Minimal starter runbook for cloud agents to install dependencies, run packages, execute tests, and troubleshoot the Scalar monorepo quickly.

scalar/scalar

Call any REST API dynamically. An agent skill from NVIDIA/SkillEvaluator.

NVIDIA/SkillEvaluator

Build a composable CLI for Codex from API docs, an OpenAPI spec, existing curl examples, an SDK, a web app, an admin tool, or a local script.

huangruiteng/CS-Notes

NestJS backend development patterns for the RedisInsight API: module structure, services, controllers, DTOs, dependency injection, and error handling.

redis/RedisInsight

Build, customize, and troubleshoot OpenAPI mock servers with @scalar/mock-server, including x-handler, x-seed, authentication, and Docker.

scalar/scalar

Generate API documentation from code. An agent skill from huangjia2019/claude-code-engineering.

huangjia2019/claude-code-engineering

Generate a working CLI from any API, then wrap it in a Claude Code skill.

alexknowshtml/api2cli

Defines the nestia product contract, workspace layout, package boundaries, the Go plugin composition model, and canonical commands.

samchon/nestia

Maven build expertise for this multi-module Java project. An agent skill from skjolber/3d-bin-container-packing.

skjolber/3d-bin-container-packing

Use consistent OpenAPI terminology and definitions when writing documentation, educational material, and tooling guidance.

scalar/scalar

Generate API endpoint code and documentation from specifications.

huangjia2019/claude-code-engineering

Raccoon (小浣熊) PPT generation skill powered by the PPT OpenAPI.

SenseTime-Copilot/raccoon-ppt-skill

Reconcile the SDK against the Mollie API spec — checks and optionally fixes types, JSDoc, enums, deprecations, endpoint coverage, and helper wiring.

mollie/mollie-api-node

Generates a Datadog Terraform provider data source from an OpenAPI operation with tfgen and opens a review-ready GitHub PR with a risk scan and testing guide.

DataDog/terraform-provider-datadog

Review changes to Polar's API contract — Pydantic schemas, FastAPI endpoints, OpenAPI output and the generated SDKs.

polarsource/polar

A skill your agent uses when: generating TypeScript API layer (type definitions + request functions) from page-spec JSON or Swagger/OpenAPI docs.

ChenyCHENYU/Robot_Admin

通过 IMA OpenAPI 处理知识库任务。支持知识库内容搜索、命中详情查看、条目浏览、列出知识库、上传文件、导入网页。用户提到知识库、资料库、上传到知识库、导入网页、搜知识库时使用。

countbot-ai/CountBot

The contract every new or modified API endpoint must follow so it is correct for the public OpenAPI spec, the MCP server (npm @trycompai/mcp-server), the ValidationPipe, and the docs.

trycompai/comp

Skill for writing and updating scalar.config.json — Scalar Docs configuration reference for users and LLMs.

scalar/scalar

Guide for building web applications with the Kui framework. An agent skill from abersheeran/kui.

abersheeran/kui

A skill your agent uses when adding or changing Archestra backend routes, models, services, API request/response schemas, endpoint permissions, or OpenAPI/codegen for the generated API client.

archestra-ai/archestra

A skill your agent uses when managing Alibaba Cloud Simple Application Server (SWAS OpenAPI 2020-06-01) resources end-to-end, including querying instances, starting/stopping/rebooting, executing…

cinience/alicloud-skills

Load the repository's AutomationBench OpenAPI catalogue and run evaluations against the local simulator.

bionic-gpt/bionic-gpt

API versioning strategies for ASP.NET Core. An agent skill from codewithmukesh/dotnet-claude-kit.

codewithmukesh/dotnet-claude-kit

Guides REST and GraphQL API design, endpoint patterns, request/response schemas, versioning, and API best practices.

CloudAI-X/opencode-workflow

Land a PR that requires a coordinated ts-mono submodule change.

UKGovernmentBEIS/inspect_ai

A skill your agent uses when contributing to InsForge's product documentation in this repository.

InsForge/InsForge

Comprehensive C and .NET development skill for TSP projects.

querylenshq/ef-querylens

Write clear, predictable TypeScript and Vue TypeScript code with strong typing, maintainability, and consistent documentation conventions.

scalar/scalar

Comprehensive project planning and documentation generator for software projects.

adrianpuiu/claude-skills-marketplace

Testing Effect HttpApi services end-to-end. An agent skill from UsefulSoftwareCo/executor.

UsefulSoftwareCo/executor

Documents existing Go HTTP APIs with go-swagger3 godoc @ annotations and struct tags, then generates OpenAPI 3 specs.

parvez3019/go-swagger3

Write and update OpenAPI 3.0 specification files from REST API code.

BlueAndi/Pixelix

Generates a complete Ballerina connector from an OpenAPI specification.

ballerina-platform/ballerina-library

Configure and run openapi-format CLI workflows for OpenAPI/AsyncAPI documents.

thim81/openapi-format

Turns an OpenAPI, Swagger or OpenRPC spec into CLI commands the agent can search and call, with no MCP server or code generation.

EvilFreelancer/openapi-to-cli

End-to-end workflow for adding or changing a backend API endpoint — which module the serializer and view belong in, URL registration, OpenAPI client regeneration, and typed consumption from the…

overmind-core/overmind

Scaffold Spikard projects and generate code from OpenAPI, AsyncAPI, OpenRPC, GraphQL, and Protobuf schemas using the Spikard CLI or its MCP server.

Goldziher/spikard

Load this skill before using the execute tool. An agent skill from jeremyosih/pi-executor.

jeremyosih/pi-executor