Automated invoice processing with Telegram, GPT-4o, OCR and SAP integration
Documents & extraction workflow for n8n with 27 active steps. Starts with Telegram Trigger. Uses OpenAI. Integrations include OpenAI, Telegram, Google Sheets.
What it does
27 active nodes · Starts with Telegram Trigger.
Steps in the template include:
- Wait (Wait)
- Basic LLM Chain (Basic LLM Chain)
- OpenAI Chat Model (OpenAI Chat Model)
- No Operation, do nothing (No Operation, do nothing)
Nodes and integrations
- Wait
- Basic LLM Chain
- OpenAI Chat Model
- No Operation, do nothing
- Split Out
- Merge
- Telegram Trigger ×2
- Switch ×2
- HTTP Request ×5
- Google Sheets ×4
- Code ×2
- Telegram ×4
- Edit Fields (Set)
- Structured Output Parser
See the author’s step names
- Wait (Wait)
- Basic LLM Chain (Basic LLM Chain)
- OpenAI Chat Model (OpenAI Chat Model)
- No Operation, do nothing (No Operation, do nothing)
- Split Out (Split Out)
- Merge (Merge)
- Callback Waiting Answer (Telegram Trigger)
- Answer? (Switch)
- Connect to SAP (HTTP Request)
- Get Header (Google Sheets)
- Get Row Details (Google Sheets)
- Generate DocumentLines (Code)
- Create JSON (Code)
- POST PurchaseInvoices (HTTP Request)
- PurchaseInvoices created (Telegram)
- Trigger Receive Message (Telegram Trigger)
- Capture Telegram Data (Edit Fields (Set))
- File Received (Telegram)
- Download File (Telegram) — file
- Upload File LlamaIndex (HTTP Request)
- Validate Status LlamaIndex (HTTP Request)
- Status? (Switch)
- Get Results LlamaIndex (HTTP Request)
- Structured Output Parser (Example) (Structured Output Parser)
- Detail (Google Sheets) — append
- Header (Google Sheets) — append
- ¿Upload to SAP? (Telegram)
Accounts and credentials
- OpenAI access
- Telegram
- Google Sheets
Credential types in the graph: telegramApi, googleSheetsOAuth2Api
Check the HTTP request steps for any additional service accounts or API keys.
AI models and swaps
OpenAI · Chat
gpt-4o-mini in OpenAI Chat Model. Potentially swappable with a compatible n8n chat model node. Match structured output before testing.
Inputs and setup options
- n8n variable: user_sap
- n8n variable: password_sap
- n8n variable: company_db
- n8n variable: url_sap
- n8n variable: llamaindex_apikey
Resource information
- Credit basis
- Author listed by n8n
- Pricing
- Template access shown on n8n
- License
- Not specified
- Last record update
- Nov 5, 2026