n8n WhatsApp Auto-Response Integration

I want to build an n8n workflow that takes every incoming WhatsApp message, routes it through an LLM layer (OpenAI GPT-5 or Claude orchestrated with LangGraph / CrewAI and following MCP standards), enriches... (Budget: ₹12500 - ₹37500 INR, Jobs: API Development, C++ Programming, Documentation, FastAPI, LLM Integration, n8n, PHP, Python, Software Architecture, Software Development)