GPT-4.1-mini Powered Invoice Processing from Gmail to Google Sheets with Slack — n8n Workflow

Hoch Komplexität⚡ Auslöser17 Knoten🏷️ Invoice Processingvon koichi nagino

Übersicht

AI-Powered Invoice Processing from Gmail to Google Sheets with Slack Approval This workflow completely automates your invoice processing pipeline. It triggers when a new invoice email arrives in Gmail, uses AI to extract key data from the PDF attachment, logs it in a Google Sheet, and sends a request to Slack with simple links for one-click approval or rejection. Who's it for? This template is perfect for small business owners, finance teams, freelancers, and anyone looking to eliminate the manu

Verwendete Knoten

Google SheetsSlackGmailAI AgentOpenAI Chat ModelStructured Output Parser

Workflow-Vorschau

This workflow automates your invoice processi
Trigger
This node starts the workflow when an email matching th
Setup:
1. Add Gmail credentials.
2. Change the search query `q` to your invoice keyword
Data Preparation
These nodes download the PDF from the email and extract
AI Extraction & Logging
An AI model extracts structured data from the text, whi
Setup:
1. Add OpenAI & Google Sheets credentials.
2. Enter your Sheet I
Slack Approval Request
Sends a message to Slack containing the invoice details
Setup:
1. Add Slack credentials.
2. Enter your Slack Channel ID.
3. IMPORT
Approval/Rejection Handling
These nodes listen for clicks on the Slack links. They
modelparser
⚡
1
1. New Invoice Email Rec…
2. Get Email Attachments
3
3. Extract Text from PDF
4
4. Prepare Text for AI
5. Extract Invoice Data …
OpenAI Chat Model
⚡
W
Webhook (Approve)
⚡
W
Webhook (Reject)
10a. Send Approval Confi…
10b. Send Rejection Conf…
6. Log Invoice to Google…
Structured Output Parser
9a. Update Status to App…
9b. Update Status to Rej…
7. Send Approval Request…
8
8a. Extract Invoice ID
8
8b. Extract Invoice ID
17 nodes14 edges

So funktioniert es

  1. 1

    Auslöser

    Der Workflow startet mit einem auslöser-Auslöser.

  2. 2

    Verarbeitung

    Die Daten fließen durch 17 Knoten, connecting agent, extractfromfile, gmail.

  3. 3

    Ausgabe

    Der Workflow schließt seine Automatisierung ab und liefert das Ergebnis an das konfigurierte Ziel.

Knotendetails (17)

GO

Google Sheets

googleSheets

#1
SL

Slack

slack

#2
GM

Gmail

gmail

#3
AI

AI Agent

n8n-nodes-langchain.agent

#4
OP

OpenAI Chat Model

n8n-nodes-langchain.lmChatOpenAi

#5
ST

Structured Output Parser

n8n-nodes-langchain.outputParserStructured

#6

So importieren Sie diesen Workflow

  1. 1Klicken Sie rechts auf die Schaltfläche JSON herunterladen, um die Workflow-Datei zu speichern.
  2. 2Öffnen Sie Ihre n8n-Instanz. Gehen Sie zu Workflows → Neu → Aus Datei importieren.
  3. 3Wählen Sie die heruntergeladene Datei gpt-41-mini-powered-invoice-processing-from-gmail-to-google-sheets-with-slack und klicken Sie auf Importieren.
  4. 4Richten Sie Anmeldedaten für jeden Dienstknoten ein (API-Schlüssel, OAuth usw.).
  5. 5Klicken Sie auf Workflow testen, um zu überprüfen, ob alles funktioniert, und aktivieren Sie es dann.

Oder direkt in n8n → Aus JSON importieren einfügen:

{ "name": "GPT-4.1-mini Powered Invoice Processing from Gmail to Google Sheets with Slack", "nodes": [...], ...}

Integrationen

agentextractfromfilegmailgmailtriggergooglesheetslmchatopenaioutputparserstructuredsetslackwebhook

Diesen Workflow holen

Herunterladen und mit einem Klick importieren

JSON herunterladenAuf n8n.io ansehen
Knoten17
Komplexitäthigh
Auslösertrigger
KategorieInvoice Processing

Erstellt von

koichi nagino

koichi nagino

@nagi

Tags

agentextractfromfilegmailgmailtriggergooglesheetslmchatopenaioutputparserstructuredsetslackwebhook
⚡

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