Automation library · Money admin

Automated invoice processing system with Airtable

Started by an arriving email, and works across Airtable and Gmail. It hands the judgement calls to OpenAI. 18 steps: a working afternoon to understand properly.

MediumCalls a model: OpenAI

18 stepsMedium: a working afternoon
0Branches: places the flow splits
0Loops or waits
2Services it connects to

The flow

Starts it 1Model 6Logic 6Service 5

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

  1. 1OpenAI ModelLm Open AiModel
  2. 2Structured Output ParserOutput Parser StructuredModel
  3. 3Get list of vendorsAirtableService
  4. 4OpenAI Chat ModelLm Chat Open AiModel
  5. 5Gmail TriggerGmail triggerStarts it
  6. 6Apply Data Extraction RulesChain LlmModel
  7. 7Edit FieldsSetLogic
  8. 8Information ExtractorInformation ExtractorModel
  9. 9Gmail1GmailService
  10. 10Map OutputSetLogic
  11. 11MergeMergeLogic
  12. 12Merge1MergeLogic
  13. 13PDF -> JPG - ConvertAPIHttp RequestService
  14. 14AirtableAirtableService
  15. 15Get image dataSplit OutLogic
  16. 16GmailGmailService
  17. 17Get all img_urlSetLogic
  18. 18Analyze imageOpen AiModel

How it's built

Starts on
An arriving email
Steps
18
Size
Medium: a working afternoon
Connects to
Airtable, Gmail
Model
OpenAI

Questions

What does it need to run?

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

What starts it?

It starts on an arriving email.

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. 18 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 18 steps before you point it at anything that matters.