Open source alternatives to api-designer
24 open source AI Skills apps to use instead, best rated first.
Top picks
- G

github-ops
Launchgithub-ops is an agent skill from the ECC collection by affaan-m, listed on skills.sh. It manages a GitHub repository with a focus on community health, CI reliability and the experience of contributors. It covers triaging issues by classify
Open source
- O

opensource-pipeline
Launchopensource-pipeline is an agent skill from the ECC collection by affaan-m, listed on skills.sh. It prepares a private project for safe public release through a three-stage pipeline. The fork stage strips secrets from a copy. The sanitise st
Open source
- A

andrej-karpathy-skills
Launchandrej-karpathy-skills is a single CLAUDE.md file from the multica-ai project that is meant to improve how Claude Code behaves on coding tasks. It is derived from Andrej Karpathy's public observations about LLM coding pitfalls. The file dis
Open source
- M

microsoft/markitdown
Launchmarkitdown-mcp is the MCP server package for MarkItDown, Microsoft's tool for converting many file formats to Markdown for language models. It is a lightweight server that runs over stdio, Streamable HTTP or SSE, and exposes one tool, conve
Open source
- O

od-contribute
Launchod-contribute is an agent skill in the OpenDesign project that provides a guided, one-click contribution flow to the OpenDesign repository, written so that people without a coding background can send a real pull request. It is locked to the
Open source
- G

github-deep-research
Launchgithub-deep-research is an agent skill from the DeerFlow project that researches a single GitHub repository in several rounds and writes a report in Markdown. It is for requests that need more than a README summary, such as a comprehensive
Open source
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by shareAI-lab - A really interesting analysis of how coding agents like Claude
About api-designer

api-designer
Designing REST or GraphQL APIs, creating OpenAPI specifications
api-designer is an agent skill from the jeffallan claude-skills collection for designing REST and GraphQL APIs and writing OpenAPI 3.1 specifications. Its workflow has six steps: analyse the domain to understand business requirements, data models and client needs; model resources and their relationships, sketching an entity diagram before writing any spec; design endpoints with URI patterns, HTTP methods and request and response schemas; write the OpenAPI 3.1 contract and validate it with the Redocly linter; spin up a mock server with Prism to test the contract against real calls; and plan evolution, covering versioning, deprecation and backward compatibility. The skill also points the agent to detailed reference material for the situation at hand. It is intended for API architects and developers who want a contract settled before implementation begins. The skill is listed on skills.sh, where the page shows install counts and GitHub stars for the collection. Its Gen Agent Trust Hub audit is marked as failing, which is noted in the FAQ, while Socket and Snyk pass. Install it with npx skills add https://github.com/jeffallan/claude-skills --skill api-designer.
- Price
- Free
- Made by
- jeffallan
- Category
- AI Skills
- Website
- github.com/jeffallan/claude-skills/api-designer











