The flow
Starts it 3Model 3Logic 1Service 7
The steps in the order they run, from what starts it.
- 1OpenAI Chat ModelLm Chat Open AiModel
- 2Structured Output ParserOutput Parser StructuredModel
- 3Invoice Folder MonitorGoogle Drive triggerStarts it
- 4Monitor Email AttachmentsGmail triggerStarts it
- 5Upload Invoice (PDF) FormForm triggerStarts it
- 6Invoice Parser AI AgentAgentModel
- 7Download Invoice PDFGoogle DriveService
- 8Extract Text from Email PDFExtract From FileService
- 9Extract Text from Form PDFExtract From FileService
- 10Send Invoice for ApprovalGmailService
- 11Extract Text from Drive PDFExtract From FileService
- 12Check Approval DecisionIfLogic
- 13Insert Invoice DataGoogle SheetsService
- 14Send Rejection AlertGmailService
How it's built
- Starts on
- Someone submitting a form
- Steps
- 14, with 1 branch
- Size
- Medium: a working afternoon
- Connects to
- Gmail, Google Drive, Google Sheets
- Model
- OpenAI
Questions
What does it need to run?
An n8n account, plus your own Gmail, Google Drive and Google Sheets accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.
What starts it?
It starts on someone submitting a form.
Does it use AI?
Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.
How long does it take to set up?
Plan an afternoon. 14 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.
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 14 steps before you point it at anything that matters.