Ranked by AI agent readiness across MCP, API, CLI, Skills, and Docs.
Structured content platform with hosted MCP at mcp.sanity.io (15+ tools), REST + GROQ + GraphQL APIs, CLI with --json + --yes, agent-toolkit with 4 skills + slash commands, and llms.txt + AI quickstart
Headless CMS (41K stars) with official MCP plugin (custom tools/prompts/resources), REST + GraphQL + Local APIs, scaffolding CLI, industry-leading skills (CLAUDE.md + .claude/ + dedicated skills repo), and llms.txt + llms-full.txt