116 documented

Skills · plugins · MCP · rules114 official

Which agent do you use?

Pick your host to see what plugs into it. Every entry is documented from its official repository or docs, with install steps, permissions and limits.

Claude Code84 extensions OpenAI Codex14 extensions

Cursor32 extensions Windsurf14 extensions

Gemini CLI9 extensions

GitHub Copilot1 extensions Any MCP client46 extensions

Skill · 19Reusable instructions and scripts the agent loads for a taskAlgorithmic Art, brand-guidelines, Canvas Design… Plugin · 42Bundles of skills, commands, hooks and agentsAgent SDK Development Plugin, C# LSP, clangd LSP… MCP server · 49Connect the agent to tools, data and servicesApify MCP Server, Atlassian Rovo MCP Server, AWS API MCP Server… Rules & instructions · 6Project instructions the agent reads every sessionAGENTS.md, CLAUDE.md, Cursor Rules…

MCP servers for Claude Code and Cursor Claude Code plugins and marketplace Claude Code skills Cursor rules What is an MCP server? A plain explanation for 2026

95 extensions · Clear filters

Skill Apache-2.0

Internal Comms

by Anthropic

Helps write internal communications such as 3P updates, newsletters, FAQs, status reports and incident reports.

Does: 5 things
Install: 4 steps
Works with: Claude Code

Plugin Apache-2.0

jdtls LSP

by Anthropic

Java (Eclipse JDT.LS) language server for Claude Code: code intelligence and diagnostics for .java files.

Does: 3 things
Install: 5 steps
Works with: Claude Code

Plugin Apache-2.0

Kotlin LSP

by Anthropic

Kotlin language server for Claude Code: code intelligence and diagnostics for .kt files.

Does: 3 things
Install: 3 steps
Works with: Claude Code

Plugin Apache-2.0

Learning Output Style

by Anthropic

SessionStart hook that makes Claude ask you to write 5-10 lines at decision points and share educational insights.

Does: 5 things
Install: 3 steps
Works with: Claude Code

MCP server

Linear MCP Server

by Linear

Linear's hosted MCP server for finding, creating and updating issues, projects and comments.

Does: 5 things
Install: 4 steps
Works with: 5 hosts

Plugin Apache-2.0

Lua LSP

by Anthropic

Lua language server for Claude Code: code intelligence and diagnostics for .lua files.

Does: 3 things
Install: 5 steps
Works with: Claude Code

MCP server

Make MCP Server

by Make

Make-hosted MCP server that lets AI clients run Make scenarios and manage your Make account.

Does: 4 things
Install: 4 steps
Works with: Any MCP client, Claude Code

Plugin Apache-2.0

Math Olympiad

by Anthropic

Solves competition math (IMO, Putnam, USAMO) with context-isolated adversarial proof verification.

Does: 4 things
Install: 4 steps
Works with: Claude Code

Plugin Apache-2.0

Math Proof

by Anthropic

Two skills for research-level math: solo (single session) and siege (hours of judge and worker sub-agents), ending in proof.md.

Does: 5 things
Install: 4 steps
Works with: Claude Code

Plugin Apache-2.0

MCP Server Dev

by Anthropic

Three skills for designing and building MCP servers: remote HTTP, MCP apps with UI widgets, and MCPB packaging.

Does: 5 things
Install: 3 steps
Works with: Claude Code

Plugin Apache-2.0

MCP Tunnels

by Anthropic

Walks you through connecting Claude to a private MCP server via an Anthropic MCP tunnel using Docker Compose.

Does: 6 things
Install: 5 steps
Works with: Claude Code

Skill

mcp-builder

by Anthropic

Guide for building high-quality MCP servers in Python (FastMCP) or Node/TypeScript so LLMs can use external APIs.

Does: 4 things
Install: 4 steps
Works with: Claude Code

MCP server CC-BY-4.0

Microsoft Learn MCP Server

by Microsoft

Free remote MCP server giving AI assistants search and fetch access to official Microsoft Learn docs and code samples.

Does: 5 things
Install: 4 steps
Works with: 6 hosts

MCP server Apache-2.0

MongoDB MCP Server

by MongoDB

Official MongoDB MCP server: query and manage MongoDB databases and Atlas from an AI agent, with a read-only mode.

Does: 6 things
Install: 5 steps
Works with: 4 hosts

MCP server MIT

n8n-MCP

by Romuald Czlonkowski

Community MCP server giving AI assistants n8n node docs, templates and workflow management tools.

Does: 4 things
Install: 4 steps
Works with: 5 hosts

MCP server MIT

Neon MCP Server

by Neon

Neon's official MCP server: manage Neon Postgres projects, branches, schemas and migrations, and run queries in natural language.

Does: 5 things
Install: 4 steps
Works with: 3 hosts

Skill Proprietary (LICENSE.txt in skill folder

pdf

by Anthropic

Read, extract, merge, split, rotate, watermark, create, fill, encrypt and OCR PDF files.

Does: 3 things
Install: 4 steps
Works with: Claude Code

MCP server MIT

Perplexity API Platform MCP Server

by Perplexity

Official Perplexity MCP server: web search, quick answers, reasoning and deep research via the Perplexity API.

Does: 4 things
Install: 4 steps
Works with: 4 hosts

Plugin Apache-2.0

PHP LSP (Intelephense)

by Anthropic

PHP (Intelephense) language server for Claude Code: code intelligence and diagnostics for .php files.

Does: 3 things
Install: 4 steps
Works with: Claude Code

Plugin Apache-2.0

Playground

by Anthropic

Creates self-contained HTML playgrounds with controls, live preview and a copyable prompt output.

Does: 5 things
Install: 3 steps
Works with: Claude Code

MCP server

Playwright MCP

by Microsoft

Microsoft's MCP server for browser automation through Playwright accessibility snapshots, no vision model needed.

Does: 5 things
Install: 5 steps
Works with: 5 hosts

Plugin Apache-2.0

plugin-dev

by Anthropic

Toolkit with 7 skills and /plugin-dev:create-plugin for building Claude Code plugins.

Does: 4 things
Install: 4 steps
Works with: Claude Code

MCP server MIT

PostHog MCP

by PostHog

PostHog's official hosted MCP server: analytics, SQL, feature flags, experiments and error tracking from your AI agent.

Does: 5 things
Install: 4 steps
Works with: 5 hosts

Skill Proprietary (LICENSE.txt in skill folder

pptx

by Anthropic

Create, read, edit .pptx/.potx decks: templates, layouts, speaker notes, comments, split and combine.

Does: 3 things
Install: 4 steps
Works with: Claude Code