Automate invoice analysis via Telegram with ChatGPT-4o-mini extraction

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Introduction Upload invoices via Telegram, receive structured data instantly. Perfect for accountants and finance teams. How It Works Telegram bot receives invoices, downloads files, extracts data ...

Best for

Invoice Processing automation workflows
AI Summarization automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.telegramtrigger, n8n-nodes-base.if, n8n-nodes-base.telegram, n8n-nodes-base.httprequest, n8n-nodes-base.extractfromfile, @n8n/n8n-nodes-langchain.agent, @n8n/n8n-nodes-langchain.lmchatopenai, n8n-nodes-base.code

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Cheng Siong Chin.

Original n8n.io source

1.1 Workflow description

Title: Automate invoice analysis via Telegram with ChatGPT-4o-mini extraction
Workflow name: Automate invoice analysis via Telegram with ChatGPT-4o-mini extraction

Introduction

Upload invoices via Telegram, receive structured data instantly. Perfect for accountants and finance teams.

How It Works

Telegram bot receives invoices, downloads files, extracts data using OpenAI, then returns analysis.

Workflow Template

Telegram Trigger → Document Check → Get File → HTTP Download → AI Extract → Format Response → Send to Telegram

Workflow Steps

Telegram Trigger: Listens for uploads.
Document Check: Validates files; routes errors.
Get File: Retrieves metadata.
HTTP Download: Fetches content.
AI Extract: OpenAI parses invoice fields.
Format Response: Structures data.
Send Analysis: Delivers to chat.

Setup Instructions

Telegram Bot: Create via BotFather, add credentials.
OpenAI Agent: Add API key and extraction prompt.
HTTP Node: Set authentication.
Parser: Define invoice schema.
Error Handling: Configure fallbacks.

Prerequisites

n8n instance
Telegram Bot Token
OpenAI API key

Customization

Database storage
Accounting software integration

Benefits

Eliminates manual entry
Reduces errors

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Telegram Trigger

Type / Role: n8n-nodes-base.telegramTrigger - telegramTrigger
Config choices: Version 1.2

Block 2 - Check if Document

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 3 - Get File from Telegram

Type / Role: n8n-nodes-base.telegram - telegram
Config choices: Version 1.2

Block 4 - HTTP Request - Download File

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 5 - Extract Invoice Data

Type / Role: n8n-nodes-base.extractFromFile - extractFromFile
Config choices: Version 1

Block 6 - AI Agent - Analyze Invoice

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 1.7

Block 7 - OpenAI Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1

Block 8 - Format Response

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 9 - Send Analysis to Telegram

Type / Role: n8n-nodes-base.telegram - telegram
Config choices: Version 1.2

Block 10 - Send Error Message

Type / Role: n8n-nodes-base.telegram - telegram
Config choices: Version 1.2

Block 11 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 12 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Automate invoice analysis via Telegram with ChatGPT-4o-mini extraction
Complexity	intermediate
Nodes	12
Categories	Invoice Processing, AI Summarization
Author	Cheng Siong Chin
Published	29 Oct 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/10288/10288.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Invoice Processing workflows AI Summarization workflows

Frequently asked questions

What does Automate invoice analysis via Telegram with ChatGPT-4o-mini extraction do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Invoice Processing, AI Summarization use case.

Cheng Siong Chin

203 workflows

Nodes

n8n-nodes-base.telegramtrigger n8n-nodes-base.if n8n-nodes-base.telegram n8n-nodes-base.httprequest n8n-nodes-base.extractfromfile @n8n/n8n-nodes-langchain.agent @n8n/n8n-nodes-langchain.lmchatopenai n8n-nodes-base.code

Complexity

intermediate

Published 29 Oct 2025

Likes 0

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Install path: /data/workflows/10288/10288.json

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Automate invoice analysis via Telegram with ChatGPT-4o-mini extraction

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Introduction

How It Works

Workflow Template

Workflow Steps

Setup Instructions

Prerequisites

Customization

Benefits

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Telegram Trigger

Block 2 - Check if Document

Block 3 - Get File from Telegram

Block 4 - HTTP Request - Download File

Block 5 - Extract Invoice Data

Block 6 - AI Agent - Analyze Invoice

Block 7 - OpenAI Chat Model

Block 8 - Format Response

Block 9 - Send Analysis to Telegram

Block 10 - Send Error Message

Block 11 - Sticky Note

Block 12 - Sticky Note1

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions