Small, fast, no-nonsense APIs. Free demo key demo on every endpoint. EU-hosted, no data stored.
Available on RapidAPI (provider RegioPro APIs) and directly:
| API | What it does | Base URL |
|---|---|---|
| PayQR | SEPA payment QR codes (EPC/Girocode) + IBAN validation | https://api.installateur1210.at |
| E-Rechnung | Validate/parse/generate e-invoices: XRechnung, ZUGFeRD, ebInterface, Peppol (DE·AT·EU) | https://einvoice.installateur1210.at |
| Email Verify | Syntax + MX + disposable + typo suggestion + score | https://email.installateur1210.at |
| Crypto | Live multi-exchange price aggregation + arbitrage + indicators | https://crypto.installateur1210.at |
| FX | Official ECB rates + volatility/trend/movers analytics | https://fx.installateur1210.at |
| Portfolio | Live crypto portfolio valuation + 24h P&L + concentration risk | https://folio.installateur1210.at |
# e-invoice: generate a Peppol/EU invoice
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":"My Company","buyer":"Client","seller_country":"AT","total_net":100,"tax_amount":20,"total_gross":120,"line_items":[{"name":"Service","quantity":1,"line_amount":100}]}'
# email verification
curl "https://email.installateur1210.at/v1/email/verify?key=demo&email=test@gmial.com"Integration examples (browser, Node.js, Python, PHP) for PayQR are in examples/.
Each API also serves an OpenAPI spec at /openapi.json. Built by Kaufmann Installationen, Vienna.