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

8 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

1import { ApifyClient } from 'apify-client';
2
3// Initialize the ApifyClient with your Apify API token
4// Replace the '<YOUR_API_TOKEN>' with your token
5const client = new ApifyClient({
6    token: '<YOUR_API_TOKEN>',
7});
8
9// Prepare Actor input
10const input = {
11    "invoice": {
12        "invoice_number": "INV-2026-0001",
13        "issue_date": "2026-07-29",
14        "due_date": "2026-08-28",
15        "delivery_date": "2026-07-29",
16        "currency": "PLN",
17        "invoice_type_code": "380",
18        "buyer_reference": "BUYER-REF-1001",
19        "purchase_order_reference": "PO-2026-1001",
20        "seller": {
21            "name": "Przykladowy Sprzedawca Sp. z o.o.",
22            "address": {
23                "line1": "ul. Prosta 1",
24                "city": "Warszawa",
25                "postal_code": "00-001",
26                "country_code": "PL"
27            },
28            "vat_id": "PL5265877635",
29            "tax_id": "5265877635"
30        },
31        "buyer": {
32            "name": "Przykladowy Nabywca Sp. z o.o.",
33            "address": {
34                "line1": "ul. Dluga 2",
35                "city": "Krakow",
36                "postal_code": "30-001",
37                "country_code": "PL"
38            },
39            "vat_id": "PL1234563218",
40            "tax_id": "1234563218"
41        },
42        "lines": [
43            {
44                "id": "1",
45                "description": "Usluga doradcza",
46                "quantity": "2",
47                "unit_code": "HUR",
48                "unit_price": "500.00",
49                "tax_rate": "23",
50                "tax_category": "S"
51            }
52        ],
53        "payment": {
54            "means_code": "30",
55            "reference": "INV-2026-0001",
56            "iban": "PL61109010140000071219812874"
57        },
58        "notes": [],
59        "extensions": {
60            "ksef": {
61                "jst": false,
62                "gv": false
63            }
64        }
65    }
66};
67
68// Run the Actor and wait for it to finish
69const run = await client.actor("kamerozkan/ksef-fa-invoice-generator").call(input);
70
71// Fetch and print Actor results from the run's dataset (if any)
72console.log('Results from dataset');
73console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
74const { items } = await client.dataset(run.defaultDatasetId).listItems();
75items.forEach((item) => {
76    console.dir(item);
77});
78
79// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

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

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

Install the apify-client

$npm install apify-client

Other API clients include:

KSeF FA(3) Invoice Generator API in Python

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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