46 percent of all Google searches are for local services — 40 billion queries per month, and most of those local markets have directories built in 2011 that haven’t been updated since. In this build I show you exactly how to dominate one niche at a time using a 7-agent LangChain swarm, RAGFlow as the brain, and Notion as the content hub. Fully open source. One server. Ships in a weekend.
— What You Will Build —
0:00 Hook — 40 billion local searches a month
0:16 The opportunity — $20-$80 per qualified lead, $15K-$60K per site
0:42 The agent stack — LangChain + Firecrawl + SerpAPI + RAGFlow + Notion + n8n
1:08 The swarm — 7 specialized agents, one planner
1:40 RAGFlow = the brain — hybrid search, Memory API, cross-KB retrieval
2:10 Four paths to profit — arbitrage, ads, premium listings, agency
2:45 Execution checklist — ship in one weekend
3:05 LangChain code + CTA
— Key Ideas —
— Local service queries = 46 PCT of all Google searches (40B+ per month)
— LangChain subagent pattern with create_agent + @tool decorators
— RAGFlow 0.24 Memory API caches every dedupe decision, no wasted scrapes
— Hybrid BM25 + vector + rerank = exact name match + fuzzy dedup
— SerpAPI for Google Maps Local Pack, Firecrawl for business website enrichment
— Notion API as directory content hub, n8n for daily refresh cron
— Stack 3 cities x 4 revenue streams = $60K-$100K per month
— Runs fully on Ollama + Gemma4 for zero token cost
— Links —
— LangChain Multi-Agent Docs: https://python.langchain.com/docs/langgraph/multi-agent
— RAGFlow: https://ragflow.io/
— Firecrawl: https://firecrawl.dev/
— SerpAPI: https://serpapi.com/
— Ollama: https://ollama.com/
— Notion API: https://developers.notion.com/
— n8n: https://n8n.io/
— Free 8-page Build Guide (with LangChain code + Notion schema): https://drive.google.com/file/d/1F2-0g92mj3pT9kgbvXZHx-7AO4CRp34r/view?usp=drivesdk
— Recommended Channels —
3Blue1Brown, Two Minute Papers, freeCodeCamp, Matt Wolfe, Matthew Berman, DeepLearning.AI, Krish Naik, Sentdex, Yannic Kilcher, Nate Herk
#LangChain #RAGFlow #LangGraph #MultiAgent #LocalSEO #DirectorySites #Ollama #Gemma4 #Firecrawl #SerpAPI #Notion #n8n #AIAutomation #PassiveIncome #OpenSourceAI #AIAgents #LocalServices #LeadGen