AI Multi-Source Agent: GPT-4, Perplexity, Supabase & Google Sheets

The AI Multi-Source Agent with GPT-4, Perplexity Search, Supabase, and Google Sheets is a sophisticated n8n workflow that creates a unified AI orchestrator. It leverages GPT-4's advanced reasoning to process queries by pulling data from multiple sources: real-time web searches via Perplexity, semantic searches in Supabase vector databases, tabular data from Google Sheets, and specialized MCP tool integrations. Semantic ranking with OpenAI embeddings and Cohere reranker ensures the most relevant information is prioritized, while persistent chat memory in Postgres maintains context across interactions.

Key benefits include higher accuracy through combined retrieval and reasoning, scalability for multi-step automations, and always-up-to-date insights by merging stored data with live intelligence. This eliminates silos between internal knowledge bases, spreadsheets, and external web data, streamlining complex tasks into a single, context-aware system.

Ideal use cases encompass knowledge assistants blending internal and real-time data, automated research aggregating insights from diverse sources, enriched customer support bots, and natural language-driven MCP workflows. Perfect for enterprise teams seeking powerful AI automation without fragmented tools.