MCP server · reference verified

Filesystem MCP

Reference server giving agents scoped read/write access to local directories.

endpoint: npx -y @modelcontextprotocol/server-filesystem <allowed-dir>
auth: None (local stdio, path-scoped)
capabilities: read file · write file · list directory · search files
tags: files · local
pricing: Free
i/o: JSON-RPC 2.0 over stdio → MCP tool results
docs: https://github.com/modelcontextprotocol/servers/tree/main/src/filesystem
machine-readable: /api/public/registry/filesystem-mcp-server

Get a key in one call

No account, no email, no dashboard

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find Filesystem MCP and the rest of the registry on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover Filesystem MCP through the Agent Nexus MCP server, /llms.txt or the discovery API.