AgeBridge
AgeBridge Guided Project · IntermediateAbout 6 hours

Document intake with validation

An invoice dropped into a folder is read, checked against five rules, and either filed by itself or sent to a person with the reason written out.

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Before you start

Get ready

What you'll have at the end

An n8n workflow that watches a Drive folder, reads each invoice with Claude, writes the clean ones into a sheet and moves them to Filed, and sends the rest to a Slack channel with the exact reason they were stopped.

What it proves

extraction with confidencevalidation rulesexception path

Accounts to create

n8nNode-based workflows; cloud trial or self-hostedDocsFree offerClaude APIThe model behind the steps; pay per useDocsFree offerGoogle DriveFolders that trigger workflowsDocsGoogle SheetsYour database for the first buildsDocsSlackAlerts and approval buttonsDocs
  • Instead of Claude API: OpenAI API

What it costs: Free, apart from a few cents of model usage per page.

Have this ready

  • A made-up company whose suppliers you are approving invoices for
  • A phone you can photograph a printed receipt with
  • A Slack workspace where you may create a channel

How it fits together

Drive: Inboxa file landsn8ndownloads itClaudefields, plus a confidenceInvoices sheetwhat is already filedCode nodefive rules, written outDrive: Fileda row in the sheet, file movedDrive: Needs a lookSlack message with the reasons
  1. Drive: Inbox: a file lands
  2. n8n: downloads it
  3. Claude: fields, plus a confidence
  4. Invoices sheet: what is already filed
  5. Code node: five rules, written out
  6. Drive: Filed: a row in the sheet, file moved
  7. Drive: Needs a look: Slack message with the reasons