Pricing

from $10.00 / 1,000 invoice generateds

KSeF FA(3) Invoice Generator

Turn structured JSON into KSeF FA(3) XML, then run the pinned official FA(3) Schema and deterministic offline technical checks.

Pricing

from $10.00 / 1,000 invoice generateds

Rating

0.0

(0)

Developer

Kamer Ozkan

Actor stats

Bookmarked

Total users

Monthly active users

7 hours ago

Last modified

Categories

Developer tools

You can access the KSeF FA(3) Invoice Generator programmatically from your own applications by using the Apify API. You can also choose the language preference from below. To use the Apify API, you’ll need an Apify account and your API token, found in API & Integrations in Apify Console.

Python

JavaScript

CLI

OpenAPI

HTTP

MCP

1from apify_client import ApifyClient
2
3# Initialize the ApifyClient with your Apify API token
4# Replace '<YOUR_API_TOKEN>' with your token.
5client = ApifyClient("<YOUR_API_TOKEN>")
6
7# Prepare the Actor input
8run_input = { "invoice": {
9        "invoice_number": "INV-2026-0001",
10        "issue_date": "2026-07-29",
11        "due_date": "2026-08-28",
12        "delivery_date": "2026-07-29",
13        "currency": "PLN",
14        "invoice_type_code": "380",
15        "buyer_reference": "BUYER-REF-1001",
16        "purchase_order_reference": "PO-2026-1001",
17        "seller": {
18            "name": "Przykladowy Sprzedawca Sp. z o.o.",
19            "address": {
20                "line1": "ul. Prosta 1",
21                "city": "Warszawa",
22                "postal_code": "00-001",
23                "country_code": "PL",
24            },
25            "vat_id": "PL5265877635",
26            "tax_id": "5265877635",
27        },
28        "buyer": {
29            "name": "Przykladowy Nabywca Sp. z o.o.",
30            "address": {
31                "line1": "ul. Dluga 2",
32                "city": "Krakow",
33                "postal_code": "30-001",
34                "country_code": "PL",
35            },
36            "vat_id": "PL1234563218",
37            "tax_id": "1234563218",
38        },
39        "lines": [{
40                "id": "1",
41                "description": "Usluga doradcza",
42                "quantity": "2",
43                "unit_code": "HUR",
44                "unit_price": "500.00",
45                "tax_rate": "23",
46                "tax_category": "S",
47            }],
48        "payment": {
49            "means_code": "30",
50            "reference": "INV-2026-0001",
51            "iban": "PL61109010140000071219812874",
52        },
53        "notes": [],
54        "extensions": { "ksef": {
55                "jst": False,
56                "gv": False,
57            } },
58    } }
59
60# Run the Actor and wait for it to finish
61run = client.actor("kamerozkan/ksef-fa-invoice-generator").call(run_input=run_input)
62
63# Fetch and print Actor results from the run's dataset (if there are any)
64print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
65for item in client.dataset(run.default_dataset_id).iterate_items():
66    print(item)
67
68# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

KSeF FA(3) XML Invoice Generator API API in Python

The Apify API client for Python is the official library that allows you to use KSeF FA(3) Invoice Generator API in Python, providing convenience functions and automatic retries on errors.

Install the apify-client

$pip install apify-client

Other API clients include:

KSeF FA(3) Invoice Generator API in JavaScript

KSeF FA(3) Invoice Generator API through CLI

KSeF FA(3) Invoice Generator OpenAPI definition

KSeF FA(3) Invoice Generator API

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