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: 115
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
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
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 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
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
An MCP server for PCB design in KiCAD: the agent places components, routes connections, runs DRC and prepares manufacturing files
Needs a VPN
An MCP server that lets the agent call Gemini through its CLI to analyze large files and whole codebases
An MCP server that lets an agent control the Unreal Engine editor in words: actors, blueprints, node graphs, camera
An MCP server that turns a large codebase into a semantic feature graph for precise navigation and meaning-based search
A code-intelligence engine for agents: builds a project graph and serves symbol lookup, call chains and blast radius, saving context
Docs MCP Server
Grounded Docs MCP Server
A local MCP server that indexes docs from websites, GitHub, npm, PyPI and files and gives the agent version-aware search
A bridge from an LSP language server to the agent: definitions, references, diagnostics, hover and symbol rename
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.