E-invoice API for Germany, Austria & the EU

E-invoicing is becoming mandatory across Europe. One API to validate, parse and generate compliant e-invoices in every major format — XRechnung (DE), ZUGFeRD, ebInterface (AT) and Peppol BIS Billing 3.0 (EU-wide).

Quick start

curl -X POST "https://einvoice.installateur1210.at/v1/einvoice/generate?key=demo" -H "Content-Type: application/json" -d '{"invoice_number":"AT-1","issue_date":"2026-07-12","currency":"EUR","seller":"Kaufmann Installationen","buyer":"ACME GmbH","seller_country":"AT","seller_vat":"ATU12345678","total_net":100,"tax_amount":20,"total_gross":120,"line_items":[{"name":"Service","quantity":1,"line_amount":100}]}'

Endpoints

Endpoint	Description
`POST /v1/einvoice/validate`	Check any invoice XML against EN16931 required fields → valid + error list
`POST /v1/einvoice/parse`	XRechnung/Peppol (UBL), ZUGFeRD (CII) or ebInterface (AT) → clean JSON
`POST /v1/einvoice/generate`	JSON → valid UBL. profile: peppol (EU/AT) \| xrechnung (DE) \| en16931

Auth: X-API-Key header or ?key=. Free demo key demo. OpenAPI spec

Why this API

Covers Germany, Austria and all EU Peppol countries — not just one format
Regulatory tailwind: DE B2B mandate 2025–2028, AT e-Rechnung, Peppol EU-wide
Built by an Austrian trades business that lives invoicing
EU-hosted, no data stored

Pricing

DEMO
Free
50/day

PRO
$5/mo
10,000/mo

ULTRA
$19/mo
100,000/mo

Get a key on RapidAPI (RegioPro APIs) or email office@installateur1210.at.

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