Topic · Code and Developer
REST APIs and OpenAPI skills for Claude Code and Codex
Skills for designing and documenting REST APIs: OpenAPI and Swagger specs, endpoint design, versioning, rate limiting, SDK generation, Postman collections and Newman runs, plus tools that infer an API from code or browser traffic. They give an agent a contract-first workflow for HTTP APIs.
Highest-scoring REST API skills in the October 22, 2026 snapshot: apollo-connectors from apollographql/skills (85/100), api-to-testcase-generator from LambdaTest/agent-skills (82/100) and browser-to-api from browserbase/skills (80/100). Scores come from the Suede Skill Check.
- 31 listed skills
- 10 repositories
- 5 with full pages
25 from official publishers. 3 bundle scripts. 2 connect to an outside service. Listed in Developer Tools and Frameworks (24), Testing and QA (7).
All 31 REST API skills
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| Skill | Repository | What it does |
|---|---|---|
| api-to-testcase-generator 82/100 · B | LambdaTest/agent-skills | Generates test cases from API definitions such as OpenAPI specs, Postman collections, or raw HTTP examples, in frameworks including pytest, Jest, JUnit, and Newman. |
| apollo-connectors 85/100 · B | apollographql/skills | Guides integrating REST APIs into GraphQL supergraphs using Apollo Connectors with @source and @connect directives; marked deprecated in favor of the graphos-factory skill. |
| browser-to-api 80/100 · B | browserbase/skills | Turns a website's observable HTTP traffic into a best-effort OpenAPI 3.1 spec by analyzing a browser-trace capture, to discover endpoints from a browser session. |
| graphos-factory 79/100 · C | apollographql/skills | Builds and maintains an Apollo Connectors subgraph from a REST API in a git workspace, recording design decisions and verification evidence. |
| openapi-spec-generator 82/100 · B | LambdaTest/agent-skills | Generates OpenAPI 3.x and Swagger 2.0 specifications from natural language descriptions, code, or partial specs, as lintable YAML or JSON with schemas and examples. |
| api-analyzer 81/100 · B | LambdaTest/agent-skills | Validates whether an API request is correct based on provided inputs (method, URL, headers, body, auth, query params). Use this skill whenever a… |
| api-designer 84/100 · B | jeffallan/claude-skills | Use when designing REST or GraphQL APIs, creating OpenAPI specifications, or planning API architecture. Invoke for resource modeling, versioning… |
| api-designer 77/100 · C | LambdaTest/agent-skills | Generates complete, production-ready REST API endpoint specifications for any system or domain the user describes. Use this skill whenever the user… |
| api-fetcher-specific-domains 71/100 · C | LambdaTest/agent-skills | Provides real-world API endpoint examples and specifications from well-known platforms and domain-specific systems. Use whenever the user asks about… |
| api-inferrer-from-files 71/100 · C | LambdaTest/agent-skills | Infer and list REST API endpoints from file names or project directory structures. Use this skill whenever a user shares a list of file names, a… |
| api-integration 71/100 · C | LambdaTest/agent-skills | Designs event-driven architectures, webhook systems, API chaining flows, ETL pipelines, and integration patterns between services. Use whenever the… |
| api-rate-limiting-helper 73/100 · C | LambdaTest/agent-skills | Designs rate limiting strategies, quota systems, throttling policies, retry logic, and backoff patterns for APIs. Use whenever the user asks about… |
| api-sdk-generator 79/100 · C | LambdaTest/agent-skills | Generates client SDK code, API wrapper libraries, request/response models, and language-specific usage patterns for any REST API. Use whenever the… |
| api-tester 66/100 · D | gooseworks-ai/goose-skills | Test and document API endpoints - validate responses, check status, generate examples |
| api-versioning-helper 79/100 · C | LambdaTest/agent-skills | Advises on API versioning strategies, designs deprecation flows, generates migration guides, and handles breaking vs non-breaking change… |
| aspnet-minimal-api-openapi 59/100 · D | github/awesome-copilot | Create ASP.NET Minimal API endpoints with proper OpenAPI documentation |
| connecting-lambda-to-api-gateway 74/100 · C | aws/agent-toolkit-for-aws | Connects an existing AWS Lambda function to Amazon API Gateway by creating a REST or HTTP API with resource/method setup, Lambda proxy integration… |
| deploying-custom-domain-rest-api 71/100 · C | aws/agent-toolkit-for-aws | Deploys a Regional REST API with a custom domain name, a Lambda backend function, and a request-based Lambda authorizer using AWS CLI. Covers ACM… |
| django-expert 84/100 · B | jeffallan/claude-skills | Use when building Django web applications or REST APIs with Django REST Framework. Invoke when working with settings.py, models.py, manage.py, or… |
| document-api-endpoint 79/100 · C | getsentry/skills | Document and type a Sentry API endpoint. Write or fix @extend_schema decorators, specify response TypedDicts, type request parameters, correct type… |
| fastify-best-practices 67/100 · D | mcollina/skills | Guides development of Fastify Node.js backend servers and REST APIs using TypeScript or JavaScript. Use when building, configuring, or debugging a… |
| go-api-design 95/100 · A | eduardo-sl/go-agent-skills | HTTP/REST API design for Go services: handlers, ServeMux routing, middleware, request validation, pagination, idempotency, health checks, error… |
| go-openapi 90/100 · A | eduardo-sl/go-agent-skills | Spec-first REST development in Go with OpenAPI: generating server interfaces and clients with oapi-codegen, request validation middleware, RFC 9457… |
| newman-cicd-integration 71/100 · C | LambdaTest/agent-skills | Generate ready-to-use CI/CD pipeline configurations that install and run Newman for automated API testing. Use this skill whenever the user wants to… |
| newman-report-analyzer 79/100 · C | LambdaTest/agent-skills | Analyze Newman test run output, JSON reports, and JUnit XML results to summarize failures, diagnose root causes, identify slow requests, and suggest… |
| newman-script-helper 79/100 · C | LambdaTest/agent-skills | Generate Newman CLI run commands with the correct flags, options, and configurations. Use this skill whenever the user wants to run a Postman… |
| openapi-to-application-code 65/100 · D | github/awesome-copilot | Generate a complete, production-ready application from an OpenAPI specification |
| postman-collection-generator 79/100 · C | LambdaTest/agent-skills | Generate complete, import-ready Postman Collection v2.1 JSON files from natural language API descriptions or cURL commands. Use this skill whenever… |
| postman-newman-automation 71/100 · C | LambdaTest/agent-skills | Generate Newman CLI commands, configuration files, Jenkins pipeline scripts, and shell automation for running Postman collections in CI/CD or local… |
| postman-openapi-converter 79/100 · C | LambdaTest/agent-skills | Convert OpenAPI 3.x or Swagger 2.0 specs (YAML or JSON) into complete, import-ready Postman Collection v2.1 JSON files. Use this skill whenever the… |
| postman-test-script-generator 71/100 · C | LambdaTest/agent-skills | Write Postman test scripts (JavaScript) for pre-request logic and post-response assertions, and embed them directly into a Postman collection. Use… |
How to choose REST API skills
Start from a spec. Design skills produce OpenAPI documents that the SDK, Postman and test generators then take as input.
Postman and Newman skills output import-ready collections and CI commands; running them against a live API needs its credentials.
Framework skills for Django, Fastify and ASP.NET minimal APIs also appear here when they build REST endpoints directly.
Related topics
Test Automation 134Documentation and READMEs 42AWS 151CI/CD and DevOps 39Go 34GraphQL and gRPC 18Serverless 21.NET and C# 31
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