Automation library · Money admin

Extract and log Gmail invoices with Claude and Google Sheets

Started by an arriving email, and works across Gmail, Google Sheets and Slack. It hands the judgement calls to Claude. 11 steps, 2 branches: a working afternoon to understand properly.

MediumCalls a model: Claude

Download free
11 stepsMedium: a working afternoon
2Branches: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Model 2Logic 4Service 4

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

  1. 1Check Gmail for InvoicesGmail triggerStarts it
  2. 2Claude SonnetLm Chat AnthropicModel
  3. 3Configure SettingsCodeLogic
  4. 4Extract Invoice Data with ClaudeChain LlmModel
  5. 5Parse and Validate ExtractionCodeLogic
  6. 6Check for DuplicateGoogle SheetsService
  7. 7Is New InvoiceIfLogic
  8. 8Log Invoice to SheetsGoogle SheetsService
  9. 9Mark Email as ReadGmailService
  10. 10Needs Slack AlertIfLogic
  11. 11Notify - High Value or OverdueSlackService

How it's built

Starts on
An arriving email
Steps
11, with 2 branches
Size
Medium: a working afternoon
Connects to
Gmail, Google Sheets, Slack
Model
Claude

Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Sheets and Slack accounts, and a key for Claude. 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 Claude. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 11 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 11 steps before you point it at anything that matters.