Automatically Create Invoices from Gmail Labels with GPT-4O + QuickBooks — n8n ワークフロー

中 複雑度⏰ スケジュール12個のノード🏷️ Invoice Processing作成者：Rosh Ragel

概要

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

使用ノード

GmailQuickBooks OnlineCodeAI AgentOpenAI Chat ModelStructured Output Parser

ワークフロープレビュー

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

仕組み

  1. 1

    トリガー

    このワークフローは スケジュール トリガーで開始します、定義されたスケジュールで実行。

  2. 2

    処理

    データは 12 個のノードを流れます, connecting agent, code, gmail。

  3. 3

    出力

    ワークフローは自動化を完了し、設定された宛先に結果を配信します。

ノード詳細 (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

このワークフローのインポート方法

  1. 1右側の JSONをダウンロード ボタンをクリックしてワークフローファイルを保存します。
  2. 2n8nインスタンスを開き、ワークフロー → 新規 → ファイルからインポート に進みます。
  3. 3ダウンロードした automatically-create-invoices-from-gmail-labels-with-gpt-4o-quickbooks ファイルを選択し、インポートをクリックします。
  4. 4各サービスノードの 認証情報（APIキー、OAuthなど）を設定します。
  5. 5ワークフローをテスト をクリックして動作確認し、有効化します。

またはn8nの JSONからインポート に直接貼り付け：

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

インテグレーション

agentcodegmaillmchatopenaioutputparserstructuredquickbooksscheduletrigger

このワークフローを取得

ワンクリックでダウンロード＆インポート

JSONをダウンロードn8n.ioで見る
ノード12
複雑度medium
トリガーscheduled
カテゴリInvoice Processing

作成者

Rosh Ragel

Rosh Ragel

@roshragel

タグ

agentcodegmaillmchatopenaioutputparserstructuredquickbooksscheduletrigger
⚡

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Automate Custom QuickBooks Invoice PDFs & Email with n8n

Standard accounting templates often fail to reflect a premium brand identity. This sophisticated n8n workflow bridges the gap between financial record-keeping and professional client presentation. By moving beyond the native limitations of QuickBooks Online, this automation enables businesses to generate high-end, multi-page PDF invoices that align perfectly with their corporate styling. The process begins the moment a new invoice is generated in QuickBooks, triggering a webhook that captures real-time billing data. The workflow then utilizes advanced HTML-to-File conversion and custom Code nodes to structure data into a polished, branded layout. It handles complex logic such as line-item merging and multi-page formatting automatically. Once the document is rendered, the system bypasses generic 'no-reply' senders by routing the finalized PDF through your preferred email provider. This ensures a seamless, white-labeled experience for your clients while eliminating the manual overhead of exporting, styling, and attaching files. Ideal for agencies and service providers, this flow guarantees that your most frequent touchpoint—the bill—is as professional as your work. **Common Use Cases:** - High-end creative agencies requiring bespoke, white-labeled billing documents for premium clients. - Automated recurring subscription billing where custom tax disclosures or localized branding are required. - Service-based businesses needing to attach dynamic project reports or terms of service directly to QuickBooks invoices.

🔗 Webhook·12 nodes