kiliczsh/mcp-mongo-server

npx -y mcp-mongo-server mongodb://localhost:27017/mydatabase
Read-only: npx -y mcp-mongo-server mongodb://... --read-only
Remote HTTP: npx -y mcp-mongo-server <uri> --transport http --port 3001

Usage

• •Add the server to Claude Desktop/Cursor; talk to your database in plain language — the assistant discovers collections and their shape automatically
• •Use the convertTime helper to keep date queries unambiguous across timezones
• •Options: --read-only, --allow-cross-db, --allow-server-js, --allowed-origins, --auth-token; env vars MCP_MONGODB_*

Key features

• ✓Read-only mode blocks every write path including $out/$merge and server-side JS; safe exploration by default
• ✓Schema inference from document samples, full query & aggregation pipeline support with explain plans, insert/update/index creation
• ✓Smart ObjectId conversion (auto/none/force), progress reporting and mid-flight cancellation, two transports (stdio + HTTP)
• ✓Security defaults: cross-db aggregation and server-side JS rejected unless explicitly enabled; HTTPS origin allowlist vs DNS-rebinding

Best for

AI agents and developers who want to explore, query, and (optionally) write to MongoDB via natural language with strong safety defaults.

Caveats

• ⚠Writes only possible when read-only mode is off; cross-DB and server-side JS disabled by default
• ⚠Node.js 20 or newer required