---
title: "OrchestKit by Yonyon: developer resources (API, OpenAPI spec, MCP server)"
description: "Every developer-facing surface of OrchestKit, the free MIT-licensed Claude Code plugin published by the Yonyon software studio. All public, all free, no account required."
canonical: "https://orchestkit.dev/developers"
---

# OrchestKit by Yonyon: developer resources (API, OpenAPI spec, MCP server)

> Every developer-facing surface of OrchestKit, the free MIT-licensed Claude Code plugin published by the Yonyon software studio. All public, all free, no account required.

## Resources

- [OrchestKit OpenAPI specification](https://orchestkit.dev/openapi): Human page for the OpenAPI 3.1 docs API spec. Machine copy at /openapi.json.
- [OrchestKit MCP server](https://orchestkit.dev/docs/mcp): How to connect the hosted Streamable HTTP server and the Docker stdio image. Transport stays at /api/mcp and /mcp.
- [OrchestKit Actions MCP server](https://orchestkit.dev/docs/foundations/mcp-servers): Read-only product MCP: list skills, plan installs, check config fragments. Executes nothing. Endpoint /api/mcp/actions; card /.well-known/mcp/actions-server-card.json.
- [OrchestKit SDK packages](https://orchestkit.dev/docs/sdk): Official clients: npm CLI, PyPI orchestkit, Go module github.com/yonatangross/orchestkit/sdk.
- [OrchestKit plugin install and setup](https://orchestkit.dev/docs/getting-started/installation): Install the plugin on Claude Code, Cursor, Codex, Devin, OpenCode, Muse Code, Pi or Antigravity, then configure it.
- [OrchestKit skills reference](https://orchestkit.dev/docs/reference/skills): Reference page for each of the 110 skills: triggers, arguments, and the files each one ships.
- [OrchestKit agents reference](https://orchestkit.dev/docs/reference/agents): Reference page for each of the 36 agents: model, tools, skills, and when to use it.
- [OrchestKit hooks reference](https://orchestkit.dev/docs/reference/hooks): Every global lifecycle hook entry, grouped by Claude Code event, with what it checks.
- [OrchestKit API docs (OpenAPI 3.1 JSON)](https://orchestkit.dev/api/openapi): OpenAPI 3.1 description of the public, read-only docs API: search, Markdown fetch, batch, async jobs.
- [MCP server (hosted, Streamable HTTP)](https://orchestkit.dev/api/mcp): Connect AI agents to the docs natively. No auth. Server card at /.well-known/mcp/server-card.json.
- [MCP server (stdio, Docker image)](https://github.com/yonatangross/orchestkit/pkgs/container/orchestkit-docs-mcp): Run locally: docker run -i --rm ghcr.io/yonatangross/orchestkit-docs-mcp. Multi-arch (amd64 + arm64).
- [NLWeb natural-language endpoint](https://orchestkit.dev/ask?query=what+is+orchestkit): POST or GET /ask with a question; JSON or SSE streaming responses (NLWeb protocol).
- [CLI (npm)](https://www.npmjs.com/package/orchestkit): orchestkit, the official CLI: install, search, ask, read, mcp, doctor. Zero deps, Node >= 20. Run it with npx orchestkit or npx ork.
- [Python package (PyPI)](https://pypi.org/project/orchestkit/): orchestkit: docs API client. orchestkit-hook-contract: typed hook I/O schemas.
- [OrchestKit auth docs](https://orchestkit.dev/auth.md): The API is public and anonymous-only; auth.md states it in the WorkOS auth.md shape, with RFC 9728 PRM.
- [API versioning & deprecation policy](https://orchestkit.dev/api-policy.md): Versioning scheme, RFC 8594 Deprecation/Sunset headers, and the 6-month sunset guarantee.
- [llms.txt](https://orchestkit.dev/llms.txt): Machine-readable site index for AI agents: canonical description, use cases, and resource map.
- [API catalog (RFC 9727)](https://orchestkit.dev/.well-known/api-catalog): Linkset of every discoverable API surface at /.well-known/api-catalog.
- [Source code (GitHub)](https://github.com/yonatangross/orchestkit): MIT-licensed monorepo: plugin source, hooks, MCP server, docs site, and CI.
- [MCP registry entry](https://registry.modelcontextprotocol.io/v0/servers?search=io.github.yonatangross/orchestkit): io.github.yonatangross/orchestkit on the official Model Context Protocol registry, republished every release.

## For AI agents

- Start at the RFC 9727 API catalog (https://orchestkit.dev/.well-known/api-catalog) or https://orchestkit.dev/llms.txt.
- No credentials are required. Errors use the RFC 9457 Problem Details shape.
- Every API response carries the IETF `RateLimit-*` headers; a `429` also carries `Retry-After`.
- Versioning and deprecation guarantees: https://orchestkit.dev/api-policy (Markdown twin: https://orchestkit.dev/api-policy.md).
- Append `.md` to any documentation page URL, or send `Accept: text/markdown`, for raw Markdown.

## Publisher

Yonyon is an independent software studio building developer tooling for AI-assisted engineering; OrchestKit is its flagship product (110 skills, 36 agents, 163 lifecycle hooks). It is unrelated to the musician of the same name, see https://orchestkit.dev/yonyon.