Automated Invoice Processing with Telegram, GPT-4o, OCR and SAP Integration — n8n Workflow

High complexity⚡ Trigger27 nodes🏷️ Invoice Processing👁 12,872 viewsby Raquel Giugliano

Overview

++HOW IT WORKS:++ This workflow automates the processing of invoices sent via Telegram. It extracts the data using LlamaIndex OCR, logs it in Google Sheets, and optionally pushes the structured data to SAP Business One

🔹 1. Receive Invoice via Telegram:** A user sends a PDF of an invoice through Telegram A Telegram Trigger node listens for incoming messages and captures the file and metadata The document is downloaded and prepared for OCR

🔹 2. OCR with LlamaIndex: The file is uploaded to the L

Nodes used

Google SheetsHTTP RequestTelegramCodeBasic LLM ChainOpenAI Chat ModelStructured Output Parser

Workflow Preview

Waiting for an answer on telegram
Send data and OCR with LlamaIndex
modelparser
W
Wait
Basic LLM Chain
OpenAI Chat Model
N
No Operation, do nothing
S
Split Out
M
Merge
⚡
C
Callback Waiting Answer
A
Answer?
Connect to SAP
Get Header
Get Row Details
Generate DocumentLines
Create JSON
POST PurchaseInvoices
PurchaseInvoices created
⚡
T
Trigger Receive Message
C
Capture Telegram Data
File Received
Download File
Upload File LlamaIndex
Validate Status LlamaIndex
S
Status?
Get Results LlamaIndex
Structured Output Parser…
Detail
Header
¿Upload to SAP?
27 nodes27 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 27 nodes, connecting chainllm, code, googlesheets.

  3. 3

    Output

    The workflow completes its automation and delivers the result to the configured destination.

Node Details (27)

GO

Google Sheets

googleSheets

#1
HT

HTTP Request

httpRequest

#2
TE

Telegram

telegram

#3
CO

Code

code

#4
BA

Basic LLM Chain

n8n-nodes-langchain.chainLlm

#5
OP

OpenAI Chat Model

n8n-nodes-langchain.lmChatOpenAi

#6
ST

Structured Output Parser

n8n-nodes-langchain.outputParserStructured

#7

How to Import This Workflow

  1. 1Click Download JSON button on the right to save the workflow file.
  2. 2Open your n8n instance. Go to Workflows → New → Import from file.
  3. 3Select the downloaded automated-invoice-processing-with-telegram-gpt-4o-ocr-and-sap-integration file and click Import.
  4. 4Set up credentials for each service node (API keys, OAuth, etc.).
  5. 5Click Test Workflow to verify everything works, then activate it.

Or paste directly in n8n → Import from JSON:

{ "name": "Automated Invoice Processing with Telegram, GPT-4o, OCR and SAP Integration", "nodes": [...], ...}

Integrations

chainllmcodegooglesheetshttprequestlmchatopenaimergeoutputparserstructuredsetsplitoutswitchtelegramtelegramtriggerwait

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes27
Complexityhigh
Triggertrigger
Views12,872
CategoryInvoice Processing

Created by

Raquel Giugliano

Raquel Giugliano

@raquelgiugliano

Tags

chainllmcodegooglesheetshttprequestlmchatopenaimergeoutputparserstructuredsetsplitoutswitch
⚡

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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