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Up-to-date, version-specific library docs and code examples in your agent's context, via MCP or a CLI plus skill
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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Microsoft's free official MCP server for Microsoft Learn docs: search, page fetch and code samples with no key
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MCP tools and a CLI for a 3D building editor: the agent creates, inspects and edits architectural scenes
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A semantic code search MCP server: indexes the project into a vector database and gives the agent only relevant snippets
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A local codebase index with ten MCP tools: dependency graph, git history, code health and architectural decisions without re-grepping on every step
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Fast semantic code search for agents: returns the exact snippets instead of reading whole files and spends far fewer tokens
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An MCP server for the Godot engine: connects Claude Code, Claude Desktop and Codex to a live editor to build scenes, scripts and materials
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A Game Boy emulator with a debugger and a built-in MCP server: the agent controls execution, reads memory and inspects hardware state
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Ref's MCP server: documentation search for APIs and libraries that hands the agent only the relevant parts of pages
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An MCP server and CLI for code research: search and understand your project and all of GitHub with fewer tokens
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An open macOS app for code context engineering: an MCP server and agent orchestrator that helps agents understand a project before editing
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A local sandbox for AI agents: they run code and actions in an isolated container exposed over MCP
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Google's official remote MCP server: grounds agent answers about Google Maps Platform development in current docs
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.