MongoDB MCP — Claude & ChatGPT Connector

MCP MongoDB Endpoint (ChatGPT & Claude Connector)

URL: POST /api/mcp/mongodb

Header:

• Mcp-Session-Id (optional but recommended) — will be echoed back in every response.

Methods Supported (method):

• initialize
• notifications/initialized
• ping
• tools/list
• tools/call

Example — List tools:

{ "jsonrpc": "2.0", "method": "tools/list", "params": {}, "id": 1 }

Example — Call tool:

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": { "name": "mongodb_find", "arguments": { "database": "mydb", "collection": "orders", "filter_json": "{"status": "active"}", "limit": 50 } },
  "id": 1
}

Tools

• mongodb_list_databases
• mongodb_list_collections
• mongodb_describe_collection
• mongodb_find
• mongodb_aggregate
• mongodb_count_documents
• mongodb_get_collection_stats
• mongodb_search_collections

Security

• Read-only enforced ($out and $merge pipeline stages blocked)
• Write operators blocked in filters
• Max documents limited
• Session header echoed to prevent ChatGPT link expiry

Required env vars: MONGODB_URI, MONGODB_DATABASE (optional default db)