QueryMind lets you query a

QueryMind lets you query a real database using plain English. Type a question, get an answer — no SQL knowledge needed.

Built a production-grade AI agent using LangGraph that converts natural language to SQL, executes it on a real PostgreSQL database with 100,000+ rows, and automatically corrects errors in a retry loop if the query fails.

Key features:

7-node LangGraph agent with conditional routing and self-correction

pgvector semantic search for intelligent schema retrieval

Full observability dashboard with real-time metrics and query history

Trace replay — see every step the agent took to answer your question

Deployed live: Next.js frontend on Vercel, FastAPI backend on Render

Tech: LangGraph · Groq LLaMA 3.3 70B · PostgreSQL · pgvector · FastAPI · Next.js · Tailwind CSS Github: https://github.com/moiz-mansoori/QueryMind-NL2SQL-Agent-System