database · inferred from evidence
MongoDB
A database system from which incremental syncs were failing due to offset issues.
- MongoDB Atlas: connect from AWS Lambda and Vercel without pool exhaustion
Shows how to fix mongoDB Atlas: connect from AWS Lambda and Vercel without pool exhaustion. Use it when you hit this exact problem. Skip it when your error message or symptom looks different.
- MongoDB MCP: writes fail with --readOnly (remove the flag to allow writes)
Fixes MongoDB MCP write tools failing with not authorized or read-only errors when the server was started with --readOnly. The flag is in the default config examples and silently disables all write tools. The fix is removing --readOnly when
- MongoDB MCP: Atlas API auth failed (connection string vs API credential modes)
Fixes confusion between the MongoDB MCP server's two auth modes: connection string vs Atlas API service-account credentials. Setting MDB_MCP_API_CLIENT_ID without completing the Atlas API access setup fails, and mixing both modes causes con
- MongoDB MCP: bad auth authentication failed (percent-encode special chars in password)
Fixes the MongoDB MCP server failing to connect when the database password contains special characters. Characters like @, /, ? and # break connection-string parsing and must be percent-encoded. Use when valid credentials are rejected with
- MongoDB Atlas: size the connection pool deliberately
Shows how to fix mongoDB Atlas: size the connection pool deliberately. Use it when you hit this exact problem. Skip it when your error message or symptom looks different.
- vectorSearch must be the first pipeline stage; a wrong index name returns empty results
Guide vectorSearch must be the first pipeline stage; a wrong index name returns empty results: Verify the index exists with the exact name before debugging query vectors: a wrong name gives empty results, not an error. Use this when you hit