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Agent Skills Specification
The open standard behind SKILL.md skills, with the spec and list of supporting tools.
Claude CodeClaude appsOpenAI Codex +5
Docs & Resources
Specifications, official documentation, SDKs, registries and curated lists for building and finding skills and MCP servers.
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Model Context Protocol
Official MCP site: specification, concepts, SDKs and guides.
Claude CodeClaude appsOpenAI Codex +5
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Skills CLI (skills.sh)
The npx skills package manager: install SKILL.md skills into any supported agent.
npx skills add <github-repo-url>
Claude CodeClaude appsOpenAI Codex +3
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Awesome Claude Skills
Curated list of Claude skills across the ecosystem.
Claude CodeClaude appsOpenAI Codex +3
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Awesome Codex Skills
Curated list of skills for OpenAI Codex.
OpenAI Codex
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Claude Agent Skills Docs
Anthropic’s documentation for using and writing skills in Claude, Claude Code and the API.
Claude appsClaude Code
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Codex Skills Docs
OpenAI’s documentation for skills in Codex CLI, IDE and app.
OpenAI Codex
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FastMCP
The fast, Pythonic way to build MCP servers and clients.
pip install fastmcp
Claude CodeClaude appsCursor +4
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MCP Python SDK
Official Python SDK for building MCP servers and clients.
pip install "mcp[cli]"
Claude CodeClaude appsCursor +4
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MCP Reference Servers
The small set of reference MCP servers maintained by the MCP project.
Claude CodeClaude appsCursor +4
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MCP Registry
The official registry of public MCP servers and their metadata.
Claude CodeClaude appsOpenAI Codex +5
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MCP TypeScript SDK
Official TypeScript SDK for building MCP servers and clients.
npm install @modelcontextprotocol/sdk
Claude CodeClaude appsCursor +4
About Docs & Resources
Specifications, official documentation, SDKs, registries and curated lists for building and finding skills and MCP servers.