Automatically Create Invoices from Gmail Labels with GPT-4O + QuickBooks — Workflow n8n

Moyen complexité⏰ Planifié12 nœuds🏷️ Invoice Processingpar Rosh Ragel

Aperçu

What It Does This workflow reads Gmail threads labeled Invoice Needed, extracts invoice and client details using an AI agent, and creates a draft invoice in QuickBooks Online. It then downloads the invoice as a PDF and drafts a reply email with the invoice attached — all automatically.

Perfect for freelancers, agencies, or small businesses looking to streamline client billing from email.

Prerequisites To use this workflow, you’ll need:

A Gmail OAuth2 credential A QuickBooks OAuth2 credential

Nœuds utilisés

GmailQuickBooks OnlineCodeAI AgentOpenAI Chat ModelStructured Output Parser

Aperçu du workflow

Automatically Create and Draft Invoices from
What It Does
This workflow reads Gmail threads labeled `Invoice Need
Schedule
This node determines how often the workflow should chec
Gmail
Connects to Gmail and pulls email threads that have the
Combine All Messages
Groups together all messages within a thread so AI can
AI Agent: Extract Customer & Invoice Details
Uses OpenAI to read the email content and extract struc
Add Client to QBO
Tries to add a new customer to QuickBooks
Find Existing Customer
Searches your QuickBooks account for a customer with th
Create A New Invoice
Builds a draft invoice in QBO using the client info and
Download Invoice
Pulls the PDF version of the invoice from QBO so it can
Write Draft Reply to Client
Creates a draft email reply to the original thread in G
Remove Invoice Needed Label
Removes the "Invoice Needed" label from the email threa
modelparser
Add Client to QBO
Get Messages w/ Invoice …
OpenAI Chat Model
Structured Output Parser
Find Existing Customer
Create A New Invoice
Download Invoice
Write Draft Reply to Cli…
⚡
S
Schedule Trigger
AI Agent: Extract Custom…
Remove Invoice Needed La…
Combine all Messages in …
12 nodes11 edges

Comment ça fonctionne

  1. 1

    Déclencheur

    Le workflow démarre avec un déclencheur planifié, s'exécutant selon un planning défini.

  2. 2

    Traitement

    Les données transitent par 12 nœuds, connecting agent, code, gmail.

  3. 3

    Sortie

    Le workflow termine son automatisation et livre le résultat à la destination configurée.

Détails des nœuds (12)

GM

Gmail

gmail

#1
QU

QuickBooks Online

quickbooks

#2
CO

Code

code

#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

Comment importer ce workflow

  1. 1Cliquez sur le bouton Télécharger JSON à droite pour enregistrer le fichier du workflow.
  2. 2Ouvrez votre instance n8n. Accédez à Workflows → Nouveau → Importer depuis un fichier.
  3. 3Sélectionnez le fichier automatically-create-invoices-from-gmail-labels-with-gpt-4o-quickbooks téléchargé et cliquez sur Importer.
  4. 4Configurez les identifiants pour chaque nœud de service (clés API, OAuth, etc.).
  5. 5Cliquez sur Tester le workflow pour vérifier que tout fonctionne, puis activez-le.

Ou collez directement dans n8n → Importer depuis JSON :

{ "name": "Automatically Create Invoices from Gmail Labels with GPT-4O + QuickBooks", "nodes": [...], ...}

Intégrations

agentcodegmaillmchatopenaioutputparserstructuredquickbooksscheduletrigger

Obtenir ce workflow

Téléchargez et importez en un clic

Télécharger JSONVoir sur n8n.io
Nœuds12
Complexitémedium
Déclencheurscheduled
CatégorieInvoice Processing

Créé par

Rosh Ragel

Rosh Ragel

@roshragel

Tags

agentcodegmaillmchatopenaioutputparserstructuredquickbooksscheduletrigger
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🔗 Webhook·12 nodes