# Poll and download received invoice PDFs with KSeF Gateway: n8n workflow

> Started by a clock. It calls services over plain HTTP rather than through connectors. 13 steps, 2 branches: a working afternoon to understand properly.

Source: https://millionrounds.com/workflow/poll-and-download-received-invoice-pdfs-with-ksef-gateway (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Money admin](https://millionrounds.com/workflows?category=Money+admin#library)

# Poll and download received invoice PDFs with KSeF Gateway

Started by a clock. It calls services over plain HTTP rather than through connectors. 13 steps, 2 branches: a working afternoon to understand properly.

Medium

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fpoll-and-download-received-invoice-pdfs-with-ksef-gateway)

**13 steps** Medium: a working afternoon

**2** Branches: places the flow splits

**0** Loops or waits

**0** Services by connector: it calls them over plain HTTP

## The flow

Starts it 1 Logic 9 Service 3

The steps in the order they run, from what starts it.

- 1 **Poll Every 20 Minutes** Schedule trigger *Starts it*
- 2 **Configuration (EDIT ME)** Set *Logic*
- 3 **Get Checkpoint** Code *Logic*
- 4 **Get New Invoices** Http Request *Service*
- 5 **Success?** If *Logic*
- 6 **Save Checkpoint** Code *Logic*
- 7 **Log Poll Error** Set *Logic*
- 8 **Has New Invoices?** If *Logic*
- 9 **Split Invoices** Split Out *Logic*
- 10 **No New Invoices** No Op *Logic*
- 11 **Download Invoice PDF** Http Request *Service*
- 12 **Save PDF To Disk** Read Write File *Service*
- 13 **Notify (TODO)** Set *Logic*

## How it's built

- **Starts on:** A clock
- **Steps:** 13, with 2 branches
- **Size:** Medium: a working afternoon
- **Connects to:** Nothing by connector; it calls services over plain HTTP
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

An n8n account. You connect your own accounts after importing it; none are included.

What starts it?

It starts on a clock.

Does it use AI?

No. Every step is fixed logic or a call to a service, so it does the same thing every time.

How long does it take to set up?

Plan an afternoon. 13 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 13 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fpoll-and-download-received-invoice-pdfs-with-ksef-gateway)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Workflows like it

Also money admin, with the same services where possible, closest in size first.

- [**Automate Stripe payment to QuickBooks sales receipt sync** 13 steps · Stripe](https://millionrounds.com/workflow/automate-stripe-payment-to-quickbooks-sales-receipt-sync)
- [**Automated proof-of-delivery with OpenAI and ERP** 13 steps](https://millionrounds.com/workflow/automated-proof-of-delivery-with-openai-and-erp)
- [**Classify invoices and route them to Google Drive with Slack** 13 steps · Google Drive, Slack](https://millionrounds.com/workflow/classify-invoices-and-route-them-to-google-drive-with-slack)
- [**Create customer invoices for paid WooCommerce orders** 13 steps · WooCommerce](https://millionrounds.com/workflow/create-customer-invoices-for-paid-woocommerce-orders)
- [**Detect payroll discrepancies with Google Sheets and Slack** 13 steps · Gmail, Google Sheets](https://millionrounds.com/workflow/detect-payroll-discrepancies-with-google-sheets-and-slack)
- [**Export PDF invoices from SmartBill to Google Drive** 13 steps · Google Drive](https://millionrounds.com/workflow/export-pdf-invoices-from-smartbill-to-google-drive)