fakturka-api-mcp

fakturka-api-mcp

Free Polish VAT invoice generation MCP server with PDF output and preview. No API key required.

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README

Faktuj MCP Server

npm version Website API Status

Integrate Faktuj into Claude, Cursor, VS Code, and any MCP-compatible AI assistant. Generate Polish VAT invoices, proforma invoices, look up companies by NIP, check NBP exchange rates, and validate IBAN numbers — all from your AI workflow.

No API key required. Free forever.

Quick Start

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "faktuj": {
      "command": "npx",
      "args": ["-y", "faktuj-mcp"]
    }
  }
}

Or install globally:

npm install -g faktuj-mcp

Then add to your config:

{
  "mcpServers": {
    "faktuj": {
      "command": "faktuj-mcp"
    }
  }
}

Available Tools

Tool Description
generate_invoice Generate a Polish VAT invoice PDF. Pass full invoice JSON with seller, buyer, and line items. Returns invoice number and base64 PDF.
generate_proforma Generate a proforma invoice PDF. Same schema as VAT invoice. Returns invoice number and base64 PDF.
preview_invoice Preview and validate invoice data without generating a PDF. Returns validated data or validation errors.
lookup_nip Look up a Polish company by NIP tax identification number. Returns company name, address, and registration data.
lookup_nbp_rate Look up NBP (National Bank of Poland) exchange rate for a given currency and date.
validate_iban Validate an IBAN number. Returns validation result and bank details if valid.

Example Usage

Ask your AI assistant:

  • "Generate a VAT invoice from ACME sp. z o.o. (NIP: 1234567890) to Beta S.A. for 10 hours of consulting at 200 PLN/h"
  • "Look up the company with NIP 5263442510"
  • "What was the EUR/PLN exchange rate on 2026-03-20?"
  • "Validate IBAN PL61109010140000071219812874"

Architecture

AI Assistant <--stdio--> faktuj-mcp <--HTTPS--> faktuj.pl REST API

This is a thin stdio MCP transport layer over the Faktuj REST API. The MCP server translates tool calls into HTTP requests and returns structured responses.

Configuration

Environment Variable Default Description
FAKTUJ_API_URL https://faktuj.pl Base URL for the Faktuj API

SoftVoyagers Ecosystem

Faktuj is part of the SoftVoyagers open-source portfolio:

Product Description Website
LinkMeta Free URL metadata extraction API linkmeta.dev
PageShot Free screenshot & webpage capture API pageshot.site
PDFSpark Free HTML/URL to PDF conversion API pdfspark.dev
OGForge Free Open Graph image generator API ogforge.dev
LinkShrink Free privacy-first URL shortener API linkshrink.dev
Faktuj Free Polish VAT invoice generator faktuj.pl
QRMint Free styled QR code generator & API qrmint.dev
PageDrop Free instant HTML hosting API pagedrop.dev

License

MIT

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