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

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1. Workflow 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 n...

Best for

Invoice Processing automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.manualtrigger, n8n-nodes-base.set, n8n-nodes-base.httprequest, n8n-nodes-base.code, n8n-nodes-base.spreadsheetfile

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Greg Brzezinka.

Original n8n.io source

1.1 Workflow description

Title: Download KSeF (Poland’s e-invoicing system) invoices to an Excel spreadsheet
Workflow name: Download KSeF (Poland’s e-invoicing system) invoices to an Excel spreadsheet

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 name, net/VAT/gross amounts, currency, invoice type, and more.

Who is it for

Polish companies and accountants who need to bulk-download invoice data from KSeF for bookkeeping, reconciliation, or tax reporting.

How to set up

Get your KSeF authorization token — log in at ksef.mf.gov.pl, go to token management, and generate a token. It looks like: YYYYMMDD-XX-XXXXXXXXXX-XXXXXXXXXX-XX|nip-XXXXXXXXXX|hash
Open the ⚙️ Config node and fill in:

nip — your 10-digit NIP
authToken — the KSeF token from step 1
startDate / endDate — the date range in ISO 8601 format (e.g. 2026-01-01T00:00:00Z)
subjectType — use Subject2 for invoices you received (as buyer), Subject1 for invoices you issued (as seller)

Click "Test workflow" — the spreadsheet will appear as binary output in the Write XLSX node

How it works (under the hood)

KSeF API v2 requires a 6-step authentication flow:

Fetch the RSA public key certificate from KSeF
Request a challenge (nonce + timestamp)
RSA-OAEP encrypt your token with the challenge timestamp
Initialize authentication — returns a temporary JWT
Poll the auth status until it's ready
Redeem the temporary JWT for a real access token

Only after step 6 can you query invoices. This workflow handles all of that automatically — you just provide your token and NIP.

Extending the workflow

Some ideas for what you can add after the Write XLSX node:

Write Binary File — save the spreadsheet to disk
Send Email (Gmail / SMTP) — email the spreadsheet as an attachment
Google Drive — upload the spreadsheet to Drive
Postgres / MySQL — write invoice data to a database for querying
Download Invoice XML — add an HTTP Request node to GET /invoices/{ksefNumber} with the access token to download the full invoice XML

Requirements

A KSeF authorization token (generated at ksef.mf.gov.pl)
No external credentials or API keys needed in n8n — everything goes through the Config node
Works with n8n self-hosted and cloud

API reference

KSeF API v2: https://api.ksef.mf.gov.pl/v2
KSeF test environment: https://api-test.ksef.mf.gov.pl/v2
Official docs: https://www.gov.pl/web/kas/krajowy-system-e-faktur

Made with ❤️ by Greg Brzezinka Need help? Reach out to me!

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 - Sticky Note

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

Block 2 - Sticky Note1

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

Block 3 - Sticky Note2

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

Block 4 - Sticky Note3

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

Block 5 - When clicking 'Test workflow'

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

Block 6 - ⚙️ Config

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 7 - Get Public Key

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 8 - Get Challenge

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 9 - Encrypt Token

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

Block 10 - Init Auth

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 11 - Wait 2s

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

Block 12 - Check Auth Status

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 13 - Redeem Token

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 14 - Query Invoices

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 15 - Extract Invoices

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

Block 16 - Format for Spreadsheet

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

Block 17 - Write XLSX

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

Block 18 - Close Session

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

3. Summary Table

Workflow	Download KSeF (Poland’s e-invoicing system) invoices to an Excel spreadsheet
Complexity	advanced
Nodes	18
Categories	Invoice Processing
Author	Greg Brzezinka
Published	06 Mar 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/13925/13925.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

Frequently asked questions

What does Download KSeF (Poland’s e-invoicing system) invoices to an Excel spreadsheet 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 use case.

Greg Brzezinka

1 workflow

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.manualtrigger n8n-nodes-base.set n8n-nodes-base.httprequest n8n-nodes-base.code n8n-nodes-base.spreadsheetfile

Complexity

advanced

Published 06 Mar 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/13925/13925.json

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

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

TL;DR;

Download KSeF invoices through n8n

What it does

Who is it for

How to set up

How it works (under the hood)

Extending the workflow

Requirements

API reference

Made with ❤️ by Greg Brzezinka Need help? Reach out to me!

Tags

Categories

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note

Block 2 - Sticky Note1

Block 3 - Sticky Note2

Block 4 - Sticky Note3

Block 5 - When clicking 'Test workflow'

Block 6 - ⚙️ Config

Block 7 - Get Public Key

Block 8 - Get Challenge

Block 9 - Encrypt Token

Block 10 - Init Auth

Block 11 - Wait 2s

Block 12 - Check Auth Status

Block 13 - Redeem Token

Block 14 - Query Invoices

Block 15 - Extract Invoices

Block 16 - Format for Spreadsheet

Block 17 - Write XLSX

Block 18 - Close Session

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