Procesamiento automático de facturas de Gmail con Azure GPT-4.1 y verificación humana

• •Cuenta de Google y credenciales de API de Gmail
• •Clave de API de OpenAI

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        "filters": {
          "sender": "youremail@gmail.com"
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        "fileName": "=C:/Test/Invoices/invoice_{{ $now.toFormat('yyyyLLdd_HHmmss') }}.pdf",
        "dataPropertyName": "attachment_0"
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    {
      "id": "e23bf999-1718-4489-a308-e244b22e14ad",
      "name": "Enviar un mensaje",
      "type": "n8n-nodes-base.gmail",
      "position": [
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      "webhookId": "aaafea40-4fcd-4775-82bf-5302914a681b",
      "parameters": {
        "sendTo": "receiver@gmail.com",
        "message": "I had trouble parsing the recent invoice. Can you please confirm that it is an invoice?",
        "options": {
          "appendAttribution": false
        },
        "subject": "Approval Required!",
        "operation": "sendAndWait",
        "approvalOptions": {
          "values": {
            "approvalType": "double"
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        "options": {
          "appendAttribution": false
        },
        "subject": "=Invoice Downloaded"
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        "width": 200,
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        "content": "Checks if there is any pdf attachments in email, and Invoice is included in subject\n"
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        "content": "If both are true, it extracts the information from the pdf.\n\nIf not, it gives an error saying that there is no invoice file included."
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      "webhookId": "69f41f8b-bad8-4fe6-83db-b46e64f10e7f",
      "parameters": {
        "sendTo": "receiveremail@gmail.com",
        "message": "The latest invoice does not seem to be legit. Please verify it manually.",
        "options": {
          "appendAttribution": false
        },
        "subject": "Manual Verification Required"
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        "content": "After verifying that the file is an invoice, it saves the file in the local directory. When the workflow is completed, it sends a success email to user."
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        "content": "## Use this to automatically save invoice received in an email"
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