n8n
Open-source workflow automation: connect APIs, AI models, and data stores with visual nodes and self-hosted or cloud execution.
What is n8n?
n8n is a fair-code workflow automation platform. You build flows as a graph of nodes (triggers, HTTP requests, databases, AI chains, and hundreds of integrations) instead of writing glue scripts by hand. It is a common choice for RAG pipelines: ingest documents, chunk and embed them, call a vector store, then pass retrieved context into an LLM — all orchestrated in one workflow.
Who It's For
Developers and technical operators who want control over where workflows run (self-hosted) and how data moves between systems. This stack uses n8n as the orchestrator behind a Massachusetts Building Code Q&A demo; your own instance holds the webhook URL and any secrets.