Plugin Apache-2.0
code-simplifier
von Anthropic
Agent that simplifies code for clarity and maintainability while preserving behaviour.
- Kann
- 3 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
Skills · Plugins · MCP · Regeln114 offiziell
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 Erweiterungen
OpenAI Codex14 Erweiterungen
Cursor32 Erweiterungen
Windsurf14 Erweiterungen
Gemini CLI9 Erweiterungen
GitHub Copilot1 Erweiterungen
Any MCP client46 Erweiterungen
Skill · 19Wiederverwendbare Anweisungen und Skripte, die der Agent für eine Aufgabe lädtAlgorithmic Art, brand-guidelines, Canvas Design…
Plugin · 42Bündel aus Skills, Befehlen, Hooks und AgentenAgent SDK Development Plugin, C# LSP, clangd LSP…
MCP server · 49Den Agenten mit Tools, Daten und Diensten verbindenApify MCP Server, Atlassian Rovo MCP Server, AWS API MCP Server…
Rules & instructions · 6Projektanweisungen, die der Agent in jeder Sitzung liestAGENTS.md, CLAUDE.md, Cursor Rules…
116 Erweiterungen
MCP-Server Apache-2.0
Codex MCP configuration
von OpenAI
How OpenAI Codex connects to MCP servers via codex mcp add or [mcp_servers] tables in config.toml, for CLI and IDE.
- Kann
- 5 Dinge
- Installieren
- 5 Schritte
- Funktioniert mit
- OpenAI Codex
Plugin Apache-2.0
commit-commands
von Anthropic
Slash commands for git commit, push and PR creation in one step.
- Kann
- 4 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
MCP-Server MIT
Context7 MCP
von Upstash
Upstash's MCP server that injects up-to-date, version-specific library docs and code examples into your prompt.
- Kann
- 5 Dinge
- Installieren
- 5 Schritte
- Funktioniert mit
- 3 Hosts
Cursor MCP
von Cursor (Anysphere)
Connect Cursor to external tools and data via MCP servers configured in mcp.json or installed from the Cursor Marketplace.
- Kann
- 4 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Cursor
Cursor Plugins and Marketplace
von Cursor (Anysphere)
Cursor Plugins bundle skills, MCP servers, rules, agents, commands and hooks; official ones are listed in the Cursor Marketplace.
- Kann
- 5 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Cursor
Cursor Rules
von Cursor (Anysphere)
Persistent prompt-level instructions for Cursor Agent: project .mdc rules, user rules, team rules and AGENTS.md.
- Kann
- 4 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Cursor
Plugin Apache-2.0
CWC Makers
von Anthropic
One-command onboarding for the Code-with-Claude Makers M5Stack Cardputer kit: clone, flash, install apps.
- Kann
- 6 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
Skill Apache-2.0
Discernment Nudge
von Anthropic
Appends 2-3 short follow-up questions to substantive answers so users check facts, reasoning and missing context.
- Kann
- 5 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
doc-coauthoring
von Anthropic
Structured workflow for co-authoring docs, proposals, specs and decision docs with context gathering, refinement and reader testing.
- Kann
- 4 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
MCP-Server MIT
Docker MCP Toolkit and MCP Gateway
von Docker
Docker's MCP Toolkit and gateway: run catalog MCP servers in isolated containers and expose them to any client through one endpoint.
- Kann
- 6 Dinge
- Installieren
- 5 Schritte
- Funktioniert mit
- 3 Hosts
document-skills
von Anthropic
Collection of document skills: Excel, Word, PowerPoint and PDF.
- Kann
- 3 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
MCP-Server Apache-2.0
Elasticsearch MCP Server (deprecated)
von Elastic
Elastic's MCP server for querying Elasticsearch indices in natural language; deprecated in favor of Elastic Agent Builder MCP.
- Kann
- 4 Dinge
- Installieren
- 5 Schritte
- Funktioniert mit
- Any MCP client
MCP-Server MIT
Everything MCP Server
von Model Context Protocol
Reference test MCP server that exercises prompts, resources, tools and sampling, for people building MCP clients.
- Kann
- 3 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Any MCP client
MCP-Server MIT
Exa MCP Server
von Exa Labs
Hosted Exa MCP server giving AI agents web search, page fetching and multi-step research.
- Kann
- 5 Dinge
- Installieren
- 5 Schritte
- Funktioniert mit
- 6 Hosts
Plugin Apache-2.0
Example Plugin
von Anthropic
Reference plugin showing skills, legacy commands and MCP server config for Claude Code plugin authors.
- Kann
- 4 Dinge
- Installieren
- 3 Schritte
- Funktioniert mit
- Claude Code
example-skills
von Anthropic
Collection of example skills: skill-creator, MCP builder, design, algorithmic art, comms, web testing, artifacts, Slack GIFs, themes.
- Kann
- 3 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
Plugin Apache-2.0
explanatory-output-style
von Anthropic
SessionStart hook adding educational insights on implementation choices (replaces deprecated output style).
- Kann
- 3 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
Plugin Apache-2.0
feature-dev
von Anthropic
7-phase guided feature development workflow with exploration, architecture and review agents.
- Kann
- 4 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Claude Code
MCP-Server MIT
Fetch MCP Server
von Model Context Protocol
Reference MCP server that fetches a URL and returns its content as markdown, in chunks, for LLM use.
- Kann
- 5 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Any MCP client
Figma MCP Server
von Figma
Figma's MCP server (remote or desktop) to get design context, generate code from frames and write to the canvas.
- Kann
- 6 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- 5 Hosts
MCP-Server MIT
Filesystem MCP Server
von Model Context Protocol
Reference MCP server for reading, writing, searching and moving files inside directories you explicitly allow.
- Kann
- 6 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Any MCP client
MCP-Server MIT
Firecrawl MCP Server
von Firecrawl
Firecrawl's MCP server to search, scrape, crawl and interact with the live web, hosted or self-run.
- Kann
- 5 Dinge
- Installieren
- 4 Schritte
- Funktioniert mit
- Any MCP client
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.