Yarn

Yarn Plugin API

Yarn ships with a full plugin API exposed by `@yarnpkg/core`. Plugins can register commands, resolvers, fetchers, linkers, and lifecycle hooks. Plugins are installed with `yarn plugin import` and listed/verified with `yarn plugin list`, `yarn plugin check`, and `yarn plugin runtime`. The default distribution bundles 20+ plugins including plugin-npm, plugin-pnp, plugin-workspace-tools, plugin-constraints, plugin-typescript, plugin-interactive-tools, and plugin-stage.

GitHub

Documentation

📖
Documentation
https://yarnpkg.com/advanced/plugin-tutorial
📖
Documentation
https://yarnpkg.com/api
📖
Documentation
https://yarnpkg.com/cli/plugin/import
📖
Documentation
https://yarnpkg.com/cli/plugin/list

Other Resources

🔗
SourceCode
https://github.com/yarnpkg/berry/tree/master/packages/yarnpkg-core

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/yarn-plugin-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
aid: yarn-pkg:yarn-plugin-api
name: Yarn Plugin API
tags:
- Plugins
- Extensibility
- JavaScript
- SDK
humanURL: https://yarnpkg.com/advanced/plugin-tutorial
properties:
- url: https://yarnpkg.com/advanced/plugin-tutorial
  type: Documentation
- url: https://yarnpkg.com/api
  type: Documentation
- url: https://github.com/yarnpkg/berry/tree/master/packages/yarnpkg-core
  type: SourceCode
- url: https://yarnpkg.com/cli/plugin/import
  type: Documentation
- url: https://yarnpkg.com/cli/plugin/list
  type: Documentation
description: Yarn ships with a full plugin API exposed by `@yarnpkg/core`. Plugins can register commands,
  resolvers, fetchers, linkers, and lifecycle hooks. Plugins are installed with `yarn plugin import` and
  listed/verified with `yarn plugin list`, `yarn plugin check`, and `yarn plugin runtime`. The default
  distribution bundles 20+ plugins including plugin-npm, plugin-pnp, plugin-workspace-tools, plugin-constraints,
  plugin-typescript, plugin-interactive-tools, and plugin-stage.