Reference MCP servers
Model Context Protocol servers
Official reference MCP servers: Filesystem, Fetch, Git, Memory, Sequential Thinking, Time and Everything
MCP servers
An MCP server connects an agent to external data and tools over a single protocol: files, databases, APIs and services. This section lists servers with their transport, auth method and environment variables, an install command and an honest read on the risks.
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Found: 213
Official
Official
Up-to-date, version-specific library docs and code examples in your agent's context, via MCP or a CLI plus skill
Indexes a codebase into a knowledge graph and gives the agent call chains, change blast radius and code search over MCP
An MCP server that gives agents IDE powers: symbol and reference lookup, symbol-level edits and renames via LSP or JetBrains
An MCP server for GitLab and self-hosted instances: projects, merge requests, issues, pipelines, wiki and releases
Official
Microsoft's free official MCP server for Microsoft Learn docs: search, page fetch and code samples with no key
Local code graph for agents: an MCP server returns entry points, symbol links and change impact in one call
An MCP server that builds a code graph of functions, classes, calls and routes and answers the agent's structural queries locally
Local code structure graph: builds a repository map with tree-sitter and serves the assistant only the context a change actually touches over MCP
Official
MCP tools and a CLI for a 3D building editor: the agent creates, inspects and edits architectural scenes
Control the Unity Editor from an agent over MCP: scenes and objects, C# scripts, assets, tests, profiling and builds
Official
A semantic code search MCP server: indexes the project into a vector database and gives the agent only relevant snippets
A remote MCP server that gives the agent docs and code of any public GitHub repository with nothing to install
Official
A local codebase index with ten MCP tools: dependency graph, git history, code health and architectural decisions without re-grepping on every step
Official
Fast semantic code search for agents: returns the exact snippets instead of reading whole files and spends far fewer tokens
An MCP server that gives an agent search over a large Claude Code guide, official docs, releases and ready-made templates
An MCP server for the Godot engine: launch the editor, run projects and edit scenes from an agent
An MCP server and CLI that build a knowledge graph of a monorepo and let an agent query, understand and edit multi-language code
A self-hosted MCP server that gives ChatGPT and other clients access to code on your machine: read, edit, search and run commands
A Unity plugin with an MCP server, skills and CLI: the agent drives scenes, assets, scripts and tests in the Unity Editor
MCP server for spec-driven development: requirements, design and tasks step by step, with a web dashboard and a VS Code extension
A local codebase index for agents: hybrid search, dependency graphs and change impact analysis
An MCP server that indexes code with tree-sitter and returns individual functions and classes to the agent instead of whole files
Official
An MCP server for the Godot engine: connects Claude Code, Claude Desktop and Codex to a live editor to build scenes, scripts and materials
Frequently asked questions
What is an MCP server?
An MCP server connects an agent to external data and tools over a single protocol: files, databases, APIs and services. The agent calls its tools while it works.
How do I connect an MCP server to an agent?
The entry lists how to run it (npx, uvx, docker or a remote URL) and the environment variables. A config snippet goes into the agent settings.
Do I need a key or a paid account?
It depends on the server. Each entry states the auth method and requirements, including paid accounts, in the limitations block.