MCP server Reference
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Reference MCP server that exercises prompts, resources, tools, and other protocol features. It is a client test server, not a product.
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Filesystem
Reference server for reading and writing files inside directories you pass on the command line.
- Type
- MCP server
- Author
- Model Context Protocol
- License
- MIT OR Apache-2.0
- Status
- Reference
- Listed
- 2026-11-07
- Package
- @modelcontextprotocol/server-filesystem
Before you use it. Reference implementation in modelcontextprotocol/servers. Upstream says these servers demonstrate the protocol and are not production-ready. Only pass directories you intend the agent to touch. The README documents --read-only and --confine-roots. Roots from older clients can widen access unless you confine them.
TypeScript package license field is "SEE LICENSE IN LICENSE". The repository root LICENSE describes a transition from MIT to Apache-2.0: new contributions are Apache-2.0, and older contributions stay MIT until the author agrees to relicense. Treat the server as mixed MIT / Apache-2.0.
Documented install
Copied from the upstream README on 2026-11-07. If it disagrees with the repository, trust the repository.
npx -y @modelcontextprotocol/server-filesystem /path/you/explicitly/allowQuestions
What license covers Filesystem?
The catalog records this as MIT OR Apache-2.0. TypeScript package license field is "SEE LICENSE IN LICENSE". The repository root LICENSE describes a transition from MIT to Apache-2.0: new contributions are Apache-2.0, and older contributions stay MIT until the author agrees to relicense. Treat the server as mixed MIT / Apache-2.0.
Is a raw file mirrored here?
No. The license file was missing, or this is a server rather than a single document we republish. Use the source repository.
What should I check first?
Reference implementation in modelcontextprotocol/servers. Upstream says these servers demonstrate the protocol and are not production-ready. Only pass directories you intend the agent to touch. The README documents --read-only and --confine-roots. Roots from older clients can widen access unless you confine them.
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