Extraktion-von-Rechnungsdaten-aus-Slack-PDFs-mit-GPT-4o-zu-Google-Sheets

• •Slack Bot Token oder Webhook URL
• •Möglicherweise sind Ziel-API-Anmeldedaten erforderlich
• •Google Sheets API-Anmeldedaten
• •OpenAI API Key

{
  "meta": {
    "instanceId": "e04cc86c30b0cecda8e6bbc7cc41459d9bf4d76816638a14d42d636b91913ebc",
    "templateCredsSetupCompleted": true
  },
  "nodes": [
    {
      "id": "421fef2b-90cb-496d-8dd4-b613e10e9fe8",
      "name": "Zeile in Sheet anhängen",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        528,
        0
      ],
      "parameters": {
        "operation": "append",
        "sheetName": {
          "__rl": true,
          "mode": "list",
          "value": ""
        },
        "documentId": {
          "__rl": true,
          "mode": "list",
          "value": ""
        }
      },
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "OADOUEa3B96W0iqk",
          "name": "Google Sheets account 2"
        }
      },
      "typeVersion": 4.7
    },
    {
      "id": "1f16c6d5-fc5a-4ff6-b77b-f3bcc60040fc",
      "name": "Nachricht senden",
      "type": "n8n-nodes-base.slack",
      "position": [
        752,
        0
      ],
      "webhookId": "bae395be-21a2-47f4-86ca-1991460e5cec",
      "parameters": {
        "text": "=---\nInvoice date: {{ $json.invoice_date }}\nBilling to: {{ $json['billing to'] }}\nEmail: {{ $json.email }}\nTotal Amount: {{ $json.total_amount }}\nDue date: {{ $json.due_date }}",
        "select": "channel",
        "channelId": {
          "__rl": true,
          "mode": "list",
          "value": "C09ECEMB012",
          "cachedResultName": "invoice"
        },
        "otherOptions": {}
      },
      "credentials": {
        "slackApi": {
          "id": "VLK4L2mMCF7UFZXF",
          "name": "Slack account 4"
        }
      },
      "typeVersion": 2.3
    },
    {
      "id": "00111f6b-fd0b-49d9-80f6-3f0ca060de18",
      "name": "Ausgabe strukturieren",
      "type": "@n8n/n8n-nodes-langchain.outputParserStructured",
      "position": [
        312,
        224
      ],
      "parameters": {
        "jsonSchemaExample": "[{\n\t\"billing to\": \"Toshiki Hirao\",\n\t\"total_amount\": \"1000\",\n  \"invoice_date\": \"2025/04/29\",\n  \"due_date\" : \"2025/05/29\",\n  \"email\": \"xxx@yyy.jp\"\n}]\n"
      },
      "typeVersion": 1.3
    },
    {
      "id": "492e5b93-bde0-4335-843e-0f63ba151b53",
      "name": "AI-Modell",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        184,
        224
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4o",
          "cachedResultName": "gpt-4o"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "id": "in4FUooE7goQS8l0",
          "name": "OpenAi account 2"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "abc9bc40-d167-41e7-921b-1e5d8afd6810",
      "name": "Rechnungs-PDF empfangen",
      "type": "n8n-nodes-base.slackTrigger",
      "position": [
        -496,
        0
      ],
      "webhookId": "c612a1bc-e6ae-4ce0-8776-e707ae30fc11",
      "parameters": {
        "options": {},
        "trigger": [
          "message"
        ],
        "channelId": {
          "__rl": true,
          "mode": "list",
          "value": "C09ECEMB012",
          "cachedResultName": "invoice"
        }
      },
      "credentials": {
        "slackApi": {
          "id": "VLK4L2mMCF7UFZXF",
          "name": "Slack account 4"
        }
      },
      "notesInFlow": false,
      "typeVersion": 1
    },
    {
      "id": "1be006ae-9577-413f-be7d-3b3c82945b7b",
      "name": "PDF abrufen",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -272,
        0
      ],
      "parameters": {
        "url": "={{ $json.files[0].url_private_download }}",
        "options": {
          "response": {
            "response": {
              "responseFormat": "file"
            }
          }
        },
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "slackApi"
      },
      "credentials": {
        "slackApi": {
          "id": "VLK4L2mMCF7UFZXF",
          "name": "Slack account 4"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id": "e4b2917c-dd4b-47f9-a16d-3b234b548f0d",
      "name": "Informationen aus PDF extrahieren",
      "type": "n8n-nodes-base.extractFromFile",
      "position": [
        -48,
        0
      ],
      "parameters": {
        "options": {},
        "operation": "pdf",
        "binaryPropertyName": "=data"
      },
      "typeVersion": 1
    },
    {
      "id": "b75eb6e0-6daa-436f-a415-1c86a455cc0e",
      "name": "Rechnungsinformationen extrahieren",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        176,
        0
      ],
      "parameters": {
        "text": "=please read and understand the input data({{ $json.text }}). I would like you to extract billing to, email, total amount, invoice date and due date. ",
        "options": {
          "systemMessage": ""
        },
        "promptType": "define",
        "hasOutputParser": true
      },
      "typeVersion": 2.1
    },
    {
      "id": "54cacdd2-806a-40d5-9e3a-986b9d042dfc",
      "name": "Notiz",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1056,
        -144
      ],
      "parameters": {
        "width": 464,
        "height": 1024,
        "content": "## How it works\n1. Receive invoice in Slack – When a PDF invoice is uploaded to a designated Slack channel, the workflow is triggered.\n2. Fetch the PDF – The file is downloaded automatically for processing.\n3. Extract data from PDF – Basic text extraction is performed to capture invoice content.\n4. AI-powered invoice parsing – An AI model interprets the extracted text and structures essential fields such as company name, invoice number, total amount, invoice date, and due date.\n5. Save to Google Sheets – The structured invoice data is appended as a new row in a Google Sheet for easy tracking and reporting.\n6. Slack confirmation – A summary of the saved invoice details is sent back to Slack to notify the team.\n\n## How to use\n1. Import the workflow into your n8n instance.\n2. Connect Slack – Authenticate your Slack account and set up the trigger channel where invoices will be uploaded.\n3. Connect Google Sheets – Authenticate with Google Sheets and specify the target spreadsheet and sheet name.\n4. Configure the AI extraction – Adjust the parsing prompt or output structure to fit your preferred data fields (e.g., vendor name, invoice ID, amount, dates).\n5. Test the workflow – Upload a sample invoice PDF in Slack and verify that the data is correctly extracted and saved to Google Sheets.\n\n## Requirements\n- An n8n instance (cloud)\n- Slack account with permission to read uploaded files and post messages\n- Google account with access to the spreadsheet you want to update\n- AI integration (e.g., OpenAI GPT or another LLM with PDF parsing capabilities)\n- A designated Slack channel for receiving invoice PDFs"
      },
      "typeVersion": 1
    },
    {
      "id": "cbb83217-4629-4870-8340-5d65ac37f3b0",
      "name": "Notiz1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -576,
        -352
      ],
      "parameters": {
        "width": 576,
        "height": 272,
        "content": "## Workflow\nAutomate Invoice Extraction from Slack to Google Sheets with GPT Model\n\n## Introduction\nManaging invoices manually can be time-consuming and error-prone. This workflow automates the process by extracting key invoice details from PDFs shared in Slack, structuring the information with AI, saving it to Google Sheets, and sending a confirmation back to Slack. It’s a seamless way to keep your financial records organized without manual data entry."
      },
      "typeVersion": 1
    }
  ],
  "pinData": {},
  "connections": {
    "492e5b93-bde0-4335-843e-0f63ba151b53": {
      "ai_languageModel": [
        [
          {
            "node": "b75eb6e0-6daa-436f-a415-1c86a455cc0e",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "1be006ae-9577-413f-be7d-3b3c82945b7b": {
      "main": [
        [
          {
            "node": "e4b2917c-dd4b-47f9-a16d-3b234b548f0d",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "1f16c6d5-fc5a-4ff6-b77b-f3bcc60040fc": {
      "main": [
        []
      ]
    },
    "00111f6b-fd0b-49d9-80f6-3f0ca060de18": {
      "ai_outputParser": [
        [
          {
            "node": "b75eb6e0-6daa-436f-a415-1c86a455cc0e",
            "type": "ai_outputParser",
            "index": 0
          }
        ]
      ]
    },
    "421fef2b-90cb-496d-8dd4-b613e10e9fe8": {
      "main": [
        [
          {
            "node": "1f16c6d5-fc5a-4ff6-b77b-f3bcc60040fc",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "abc9bc40-d167-41e7-921b-1e5d8afd6810": {
      "main": [
        [
          {
            "node": "1be006ae-9577-413f-be7d-3b3c82945b7b",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "b75eb6e0-6daa-436f-a415-1c86a455cc0e": {
      "main": [
        [
          {
            "node": "421fef2b-90cb-496d-8dd4-b613e10e9fe8",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "e4b2917c-dd4b-47f9-a16d-3b234b548f0d": {
      "main": [
        [
          {
            "node": "b75eb6e0-6daa-436f-a415-1c86a455cc0e",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}