Plugin Apache-2.0
Agent SDK Development Plugin
by Anthropic
Scaffolds new Claude Agent SDK apps in Python or TypeScript and verifies them against best practices.
- Does
- 6 things
- Install
- 4 steps
- Works with
- Claude Code
Skills · plugins · MCP · rules114 official
MCP servers, skills, plugins and rules for AI coding agents
Extensions are the things you plug into an AI coding agent: MCP servers that give it tools and data, skills and plugins that package workflows, and rules files that set how it should behave in a repository. This index covers 116 of them, each documented from its official repository or docs, with install steps, the permissions it asks for, and known limits.
Pick your host above to see what works with it: Claude Code has the widest set (84), followed by Cursor (32), Windsurf and OpenAI Codex (14 each) and Gemini CLI (9). MCP servers marked "any MCP client" run in all of them.
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…
116 extensions
AGENTS.md
by AGENTS.md (Agentic AI Foundation, Linux Foundation)
Open Markdown format that gives coding agents project instructions, a README for agents read by Codex, Cursor, Gemini CLI, Windsurf and more.
- Does
- 4 things
- Install
- 5 steps
- Works with
- 4 hosts
Skill Apache-2.0
Algorithmic Art
by Anthropic
Creates generative p5.js art with seeded randomness and an interactive parameter viewer, for code-art requests.
- Does
- 5 things
- Install
- 4 steps
- Works with
- Claude Code
MCP server MIT
Apify MCP Server
by Apify
Apify MCP server: lets AI agents run Apify Actors to scrape and extract web data, with docs and storage tools.
- Does
- 5 things
- Install
- 5 steps
- Works with
- 3 hosts
Atlassian Rovo MCP Server
by Atlassian
Atlassian's official remote MCP server connecting Jira, Confluence and more to AI assistants with OAuth.
- Does
- 5 things
- Install
- 4 steps
- Works with
- Any MCP client, Cursor
MCP server Apache-2.0
AWS API MCP Server
by AWS Labs (Amazon Web Services)
MCP server that lets AI assistants run AWS CLI commands across all AWS services with validation and security controls.
- Does
- 5 things
- Install
- 5 steps
- Works with
- 3 hosts
MCP server Apache-2.0
AWS Documentation MCP Server
by AWS Labs (Amazon Web Services)
MCP server that fetches, searches and recommends current AWS documentation pages as markdown for AI assistants.
- Does
- 5 things
- Install
- 4 steps
- Works with
- Any MCP client, Cursor
MCP server Apache-2.0
AWS MCP Servers (awslabs/mcp)
by AWS Labs (Amazon Web Services)
Open-source suite of MCP servers from AWS Labs for AWS docs, APIs, IaC, pricing, data and more, run locally over stdio.
- Does
- 5 things
- Install
- 5 steps
- Works with
- 4 hosts
MCP server MIT
Azure MCP Server
by Microsoft
Microsoft's MCP server that brings Azure context and operations into AI agents, installable via npm, .NET, PyPI or Docker.
- Does
- 5 things
- Install
- 5 steps
- Works with
- Any MCP client, Claude Code
brand-guidelines
by Anthropic
Applies Anthropic's official brand colours and typography to artifacts.
- Does
- 3 things
- Install
- 4 steps
- Works with
- Claude Code
MCP server MIT
Brave Search MCP Server
by Brave
Brave's official MCP server for web, local, image, video and news search plus AI summarization.
- Does
- 5 things
- Install
- 4 steps
- Works with
- Any MCP client
Skill Apache-2.0
Canvas Design
by Anthropic
Creates original posters and static art as PNG or PDF from a written design philosophy.
- Does
- 5 things
- Install
- 4 steps
- Works with
- Claude Code
MCP server Apache-2.0
Chrome DevTools MCP
by Chrome DevTools (Google)
Lets your coding agent control and inspect a live Chrome browser: performance traces, network, console, screenshots, automation.
- Does
- 5 things
- Install
- 4 steps
- Works with
- 3 hosts
Plugin Apache-2.0
clangd LSP
by Anthropic
C/C++ language server for Claude Code: code intelligence and diagnostics for .c files.
- Does
- 3 things
- Install
- 5 steps
- Works with
- Claude Code
Skill Apache-2.0
Claude Academy guide
by Anthropic
Recommends a matching Claude Academy course, tutorial or use case after Claude answers a how-to-use-Claude question.
- Does
- 5 things
- Install
- 4 steps
- Works with
- Claude Code
Plugin Apache-2.0
Claude Code Setup
by Anthropic
Scans a codebase and recommends tailored Claude Code automations: hooks, skills, MCP servers, subagents, slash commands.
- Does
- 5 things
- Install
- 3 steps
- Works with
- Claude Code
Plugin Proprietary (see LICENSE)
Claude Security
by Anthropic
In-session deep vulnerability scanning with every finding challenged by verifiers, plus verified patch files you apply yourself.
- Does
- 5 things
- Install
- 4 steps
- Works with
- Claude Code
claude-api
by Anthropic
Reference for building with the Claude API / Anthropic SDK: model ids, params, streaming, tool use, MCP, agents, caching, migration.
- Does
- 4 things
- Install
- 4 steps
- Works with
- Claude Code
CLAUDE.md
by Anthropic
Markdown files of persistent project, user and org instructions that Claude Code loads at the start of every session.
- Does
- 6 things
- Install
- 5 steps
- Works with
- Claude Code
Plugin Apache-2.0
CLAUDE.md Management
by Anthropic
Audit CLAUDE.md quality, keep it aligned with the codebase, and capture session learnings with /revise-claude-md.
- Does
- 4 things
- Install
- 3 steps
- Works with
- Claude Code
Cloudflare MCP Servers
by Cloudflare
Cloudflare's remote MCP servers for docs, Workers, observability, AI Gateway and more, plus a recommended Code Mode server.
- Does
- 6 things
- Install
- 4 steps
- Works with
- Any MCP client, Cursor
Plugin Apache-2.0
Code Modernization
by Anthropic
Guided modernization of legacy codebases: assess, map, extract rules, plan, rebuild, and prove the new code matches the old.
- Does
- 6 things
- Install
- 5 steps
- Works with
- Claude Code
Plugin Apache-2.0
code-review
by Anthropic
Automated PR code review with 4 parallel agents and confidence scoring (threshold 80).
- Does
- 4 things
- Install
- 4 steps
- Works with
- Claude Code
All extensions A–Z
- Agent SDK Development Plugin
- AGENTS.md
- Algorithmic Art
- Apify MCP Server
- Atlassian Rovo MCP Server
- AWS API MCP Server
- AWS Documentation MCP Server
- AWS MCP Servers (awslabs/mcp)
- Azure MCP Server
- brand-guidelines
- Brave Search MCP Server
- C# LSP
- Canvas Design
- Chrome DevTools MCP
- clangd LSP
- Claude Academy guide
- Claude Code Setup
- Claude Security
- claude-api
- CLAUDE.md
- CLAUDE.md Management
- Cloudflare MCP Servers
- Code Modernization
- code-review
- code-simplifier
- Codex MCP configuration
- commit-commands
- Context7 MCP
- Cursor MCP
- Cursor Plugins and Marketplace
- Cursor Rules
- CWC Makers
- Discernment Nudge
- doc-coauthoring
- Docker MCP Toolkit and MCP Gateway
- document-skills
- docx
- Elasticsearch MCP Server (deprecated)
- Everything MCP Server
- Exa MCP Server
- Example Plugin
- example-skills
- explanatory-output-style
- feature-dev
- Fetch MCP Server
- Figma MCP Server
- Filesystem MCP Server
- Firecrawl MCP Server
- frontend-design
- Gemini CLI Extensions
- GEMINI.md
- Git MCP Server
- GitHub Copilot custom instructions
- GitHub MCP Server
- gopls LSP
- Grafana MCP Server
- hookify
- Hugging Face MCP Server
- Internal Comms
- jdtls LSP
- Kotlin LSP
- Learning Output Style
- Linear MCP Server
- Lua LSP
- Make MCP Server
- Math Olympiad
- Math Proof
- MCP Server Dev
- MCP Tunnels
- mcp-builder
- Memory MCP Server
- Microsoft Learn MCP Server
- MongoDB MCP Server
- n8n MCP Server Trigger
- n8n-MCP
- Neon MCP Server
- Notion MCP Server
- Perplexity API Platform MCP Server
- PHP LSP (Intelephense)
- Playground
- Playwright MCP
- plugin-dev
- Postgres MCP Pro
- PostHog MCP
- pptx
- pr-review-toolkit
- Project Artifact
- Pyright LSP
- ralph-loop
- Receipts
- Redis MCP Server
- Ruby LSP
- rust-analyzer LSP
- security-guidance
- Sentry MCP Server
- Sequential Thinking MCP Server
- Session Report
- Shopify Dev MCP
- skill-creator
- Slack GIF Creator
- Slack MCP Server (archived reference)
- Stripe MCP Server
- Supabase MCP Server
- Swift LSP (SourceKit-LSP)
- Tavily MCP Server
- theme-factory
- Time MCP Server
- TypeScript LSP
- Vercel MCP
- Web Artifacts Builder
- webapp-testing
- Windsurf MCP
- Windsurf Rules and Memories
- xlsx
- Zapier MCP
What is in the index
49 MCP servers, 42 plugins, 19 skills and 6 rules files. Each entry records the author (official vendor or community), the hosts it supports, the transport and authentication it needs, and whether it is maintained or deprecated.
MCP servers, skills, plugins and rules: the difference
An MCP server exposes tools and data over the Model Context Protocol and works in any host that speaks it. A skill or plugin is host-specific and bundles prompts, commands and sometimes an MCP server. A rules file (CLAUDE.md, AGENTS.md, .cursor/rules) is plain text the agent reads before working. The explainer on what an MCP server is goes deeper.
How entries are checked
We read the README, the install instructions and the permission list in the official repository and record them as stated. Deprecated or archived repositories are labelled. Community entries are marked as such and are not endorsed.
FAQ
Which hosts are covered?
Claude Code, Cursor, Windsurf, OpenAI Codex, Gemini CLI and GitHub Copilot, plus MCP servers that work in any MCP client.
Are these official?
Each entry says who published it. 114 of 116 come from the vendor or the official project; community entries are labelled.
Do I need an API key?
It depends on the extension. The entry lists the authentication it requires, such as an API key, OAuth or none.
How do I install an MCP server?
Each entry shows the install step for its hosts. The MCP servers hub has a comparison table by transport, auth and host.