Download KSeF (Poland’s e-invoicing system) invoices to an Excel spreadsheet — n8n Workflow

Medium complexity⚡ Trigger14 nodes🏷️ Invoice Processing👁 1 viewsby Greg Brzezinka

Overview

TL;DR;

Download invoices from Poland's KSeF (Krajowy System e-Faktur) and export them as an XLSX spreadsheet. Handles the full v2 authentication flow automatically.

Download KSeF invoices through n8n

What it does

This workflow connects to Poland's KSeF (Krajowy System e-Faktur) API v2, downloads invoice metadata for a configurable date range, and exports everything as a clean Excel spreadsheet (.xlsx).

The spreadsheet includes: KSeF number, invoice number, issue date, seller/buyer NIP and n

Nodes used

HTTP RequestCode

Workflow Preview

🇵🇱 KSeF — Download Invoices to Spreadsheet
Downloads invoice metadata from Poland's KSeF (Krajowy
Quick Start
1. Open the ⚙️
🔧 Configuration
Edit the JSON below to set your:
- nip — your 10-digit NIP number
- authToken — KSeF authorization token
- startDate / endDate — ISO 8601 format
- subjectType —
🔐 Authentication Flow (v2 API)
KSeF uses a multi-step auth:
1. Get Public Key — fetch RSA certificate
2. Get Challenge — get a challenge + timestamp
3. Encrypt Token — RSA-OAEP encrypt
📊 Output
Invoice metadata is flattened into columns:
KSeF Number, Invoice Number, Issue Date, Seller/Buyer N
The XLSX file is available as binary o
⚡
W
When clicking 'Test work…
⚙
⚙️ Config
Get Public Key
Get Challenge
Encrypt Token
Init Auth
Wait 2s
Check Auth Status
Redeem Token
Query Invoices
Extract Invoices
Format for Spreadsheet
W
Write XLSX
Close Session
14 nodes13 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 14 nodes, connecting code, httprequest, manualtrigger.

  3. 3

    Output

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

Node Details (14)

HT

HTTP Request

httpRequest

#1
CO

Code

code

#2

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 download-ksef-polands-e-invoicing-system-invoices-to-an-excel-spreadsheet 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": "Download KSeF (Poland’s e-invoicing system) invoices to an Excel spreadsheet", "nodes": [...], ...}

Integrations

codehttprequestmanualtriggersetspreadsheetfile

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes14
Complexitymedium
Triggertrigger
Views1
CategoryInvoice Processing

Created by

Greg Brzezinka

Greg Brzezinka

@ai-greg

Tags

codehttprequestmanualtriggersetspreadsheetfile
⚡

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