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

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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

$echo '{
<  "invoice": {
<    "invoice_number": "INV-2026-0001",
<    "issue_date": "2026-07-29",
<    "due_date": "2026-08-28",
<    "delivery_date": "2026-07-29",
<    "currency": "PLN",
<    "invoice_type_code": "380",
<    "buyer_reference": "BUYER-REF-1001",
<    "purchase_order_reference": "PO-2026-1001",
<    "seller": {
<      "name": "Przykladowy Sprzedawca Sp. z o.o.",
<      "address": {
<        "line1": "ul. Prosta 1",
<        "city": "Warszawa",
<        "postal_code": "00-001",
<        "country_code": "PL"
<      },
<      "vat_id": "PL5265877635",
<      "tax_id": "5265877635"
<    },
<    "buyer": {
<      "name": "Przykladowy Nabywca Sp. z o.o.",
<      "address": {
<        "line1": "ul. Dluga 2",
<        "city": "Krakow",
<        "postal_code": "30-001",
<        "country_code": "PL"
<      },
<      "vat_id": "PL1234563218",
<      "tax_id": "1234563218"
<    },
<    "lines": [
<      {
<        "id": "1",
<        "description": "Usluga doradcza",
<        "quantity": "2",
<        "unit_code": "HUR",
<        "unit_price": "500.00",
<        "tax_rate": "23",
<        "tax_category": "S"
<      }
<    ],
<    "payment": {
<      "means_code": "30",
<      "reference": "INV-2026-0001",
<      "iban": "PL61109010140000071219812874"
<    },
<    "notes": [],
<    "extensions": {
<      "ksef": {
<        "jst": false,
<        "gv": false
<      }
<    }
<  }
<}' |
<apify call kamerozkan/ksef-fa-invoice-generator --silent --output-dataset

KSeF FA(3) XML Invoice Generator API API through CLI

The Apify CLI is the official tool that allows you to use KSeF FA(3) Invoice Generator locally, providing convenience functions and automatic retries on errors.

Install Apify CLI

Using installation script (macOS/Linux):

$curl -fsSL https://apify.com/install-cli.sh | bash

Using installation script (Windows):

$irm https://apify.com/install-cli.ps1 | iex

Using Homebrew:

$brew install apify-cli

Using npm:

$npm install -g apify-cli

Other API clients include:

KSeF FA(3) Invoice Generator API in Python

KSeF FA(3) Invoice Generator API in JavaScript

KSeF FA(3) Invoice Generator OpenAPI definition

KSeF FA(3) Invoice Generator API

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