Automation library · Documents and files

Chat with PDF and GraphRAG

Started by someone opening a chat with it, and works across Google Drive. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 16 steps, 1 branch, 1 loop or waits: a working afternoon to understand properly.

MediumCalls a model: OpenAIRetrieval

Download free
16 stepsMedium: a working afternoon
1Branch: places the flow splits
1Loop or waits
1Service it connects to

The flow

Starts it 2Model 3Logic 3Service 8

The steps in the order they run, from what starts it.

  1. 1Convert File to PDFHttp RequestService
  2. 2When chat message receivedChat triggerStarts it
  3. 3OpenAI Chat ModelLm Chat Open AiModel
  4. 4Simple MemoryMemory Buffer WindowModel
  5. 5Knowledge Base GraphRAGHttp Request ToolService
  6. 6Click ‘Test workflow’ to ingest the documentsManual triggerStarts it
  7. 7AI AgentAgentModel
  8. 8Search Google DriveGoogle DriveService
  9. 9Loop Over ItemsSplit In BatchesLogic
  10. 10Retrieve FileGoogle DriveService
  11. 11SwitchSwitchLogic
  12. 12Extract from PDFExtract From FileService
  13. 13Extract from Text FileExtract From FileService
  14. 14Extract from MarkdownExtract From FileService
  15. 15Map PDF to TextSetLogic
  16. 16InfraNodus Save to GraphHttp RequestService

How it's built

Starts on
Someone opening a chat with it
Steps
16, with 1 branch, 1 loop or waits
Size
Medium: a working afternoon
Connects to
Google Drive
Model
OpenAI
Retrieval
Answers are drawn from documents you supply, not from the model alone

Questions

What does it need to run?

An n8n account, plus your own Google Drive account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on someone opening a chat with it.

Does it use AI?

Yes. It calls OpenAI. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 16 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 16 steps before you point it at anything that matters.