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Reference MCP servers

Model Context Protocol servers

Official reference MCP servers: Filesystem, Fetch, Git, Memory, Sequential Thinking, Time and Everything

MCP serverEditors’ pickMedium risk

modelcontextprotocol/serversAuthor: Model Context Protocol

Install

{
  "mcpServers": {
    "memory": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-memory"]
    }
  }
}

README example for the Memory server.

This is third-party code. Review the repository files before installing.

What it does

The repository holds a small set of reference MCP servers maintained by the MCP steering group. Filesystem provides file operations with configurable access, Fetch retrieves web pages and converts them for LLMs, Git reads and manipulates repositories, Memory keeps knowledge-graph memory and Time handles timezone conversion. TypeScript servers run with npx, Python servers with uvx or pip.

Who it is for. Developers wiring basic tools into an MCP client or learning how to build their own MCP servers.

Good fit when

  • You want to give the agent access to selected folders
  • The agent needs persistent memory across sessions
  • You want an example MCP implementation on an official SDK

Not a fit when

  • You need a production-ready server with a vetted threat model
  • You need GitHub, Slack or database servers: those are archived and replaced elsewhere

Example request

Remember that this project uses PostgreSQL 16 and deploys with Docker Compose

Limitations

The authors describe these as educational reference implementations, not production-ready solutions, and ask you to evaluate your own security requirements. The full list of published servers lives in the MCP Registry, not here. Many former servers (GitHub, PostgreSQL, Puppeteer, Slack and others) are archived.

How to disable. Remove the server entry from the mcpServers section of your client config and restart the client.

MCP

Transport
stdio
Authentication
not required

Security check

  • Filesystem and Git read and modify files in allowed paths
  • Fetch makes network requests to arbitrary URLs
  • Servers are not intended for production

README in short

The modelcontextprotocol/servers repository holds reference implementations of the Model Context Protocol that demonstrate protocol features and the official SDKs. Seven servers are active: Everything, Fetch, Filesystem, Git, Memory, Sequential Thinking and Time. Others moved to servers-archived. The README shows running them with npx and uvx and a Claude Desktop config example. It is managed by Anthropic together with the community.

FAQ

How do I run them on Windows?

Wrap npx-based entries with cmd /c: set command to cmd and prepend /c and npx to args. Leave uvx entries unchanged.

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