APIstax

# APIstax

> APIstax provides secure, reliable REST APIs (HTML to PDF, Swiss QR Invoice, EPC QR, VAT validation, geocoding, barcodes, and more). Built and hosted in Austria.

## Key Information

* All APIs use JSON requests/responses and are documented via OpenAPI.
* Dashboard / account management available at [https://app.apistax.io](https://app.apistax.io).

## Available APIs
* **HTML to PDF**: Generate PDF files using HTML content as request payload. [https://apistax.io/docs/html-to-pdf](https://apistax.io/docs/html-to-pdf)
* **EPC QR Code**: Generate EPC QR Codes to use it on your invoices and payment requests. [https://apistax.io/docs/epc-qr-code](https://apistax.io/docs/epc-qr-code)
* **Swiss QR Invoice**: Generate Swiss QR bills to use it on your invoice documents. [https://apistax.io/docs/swiss-qr-invoice](https://apistax.io/docs/swiss-qr-invoice)
* **Invoice PDF**: Create beautiful PDF invoices just from JSON data with valid e-invoice data included [https://apistax.io/docs/invoice-pdf](https://apistax.io/docs/invoice-pdf)
* **VAT Verification**: Validate VAT numbers for EU countries, Switzerland, Norway, Iceland and United Kingdom. [https://apistax.io/docs/vat-verification](https://apistax.io/docs/vat-verification)
* **Consumer Price Indexes**: List various, always up-to-date indexes like consumer price index for many countries. [https://apistax.io/docs/indexes](https://apistax.io/docs/indexes)
* **Geocoding**: Convert a known address to geo-coordinates. [https://apistax.io/docs/geocode-search](https://apistax.io/docs/geocode-search)
* **Reverse Geocoding**: Convert geo-coordinates to a postal address. [https://apistax.io/docs/geocode-reverse](https://apistax.io/docs/geocode-reverse)
* **Barcode Generation**: Generate barcodes from a wide range of different formats. [https://apistax.io/docs/barcode](https://apistax.io/docs/barcode)
* **PDF to PDF/A**: Convert PDF documents to valid, compliant and archivable PDF/A documents. [https://apistax.io/docs/pdf-to-pdf-a](https://apistax.io/docs/pdf-to-pdf-a)
* **SPAYD QR Code**: Generate Short Payment Code QR codes to enable fast, standardized bank transfers using IBAN-based payment data. [https://apistax.io/docs/spayd-qr-code](https://apistax.io/docs/spayd-qr-code)
* **PAY by square QR Code**: Create PAY by square QR codes for invoices, retail, and donations, enabling quick bank transfers through supported banking apps. [https://apistax.io/docs/pay-by-square-qr-code](https://apistax.io/docs/pay-by-square-qr-code)
* **HCT QR Code**: Generate HCT QR codes for Hungary’s instant payment system to enable fast, bank-to-bank transfers via standardized QR payments. [https://apistax.io/docs/hct-qr-code](https://apistax.io/docs/hct-qr-code)

## Documentation

* **Interactive API Docs**: [https://apistax.io/docs](https://apistax.io/docs)
* **OpenAPI UI**: [https://api.apistax.io/openapi/](https://api.apistax.io/openapi/)
* **All APIs Overview**: [https://apistax.io/apis](https://apistax.io/apis)
* **Raw OpenAPI specification (JSON)**: [https://api.apistax.io/q/openapi/](https://api.apistax.io/q/openapi/)

## Developer Resources

* **Interactive Documentation**: [https://apistax.io/docs](https://apistax.io/docs)
* **OpenAPI UI**: [https://api.apistax.io/openapi/](https://api.apistax.io/openapi/)
* **Raw OpenAPI specification (JSON)**: [https://api.apistax.io/q/openapi/](https://api.apistax.io/q/openapi/)
* **Postman Collection**: [https://www.postman.com/apistax/apistax/overview](https://www.postman.com/apistax/apistax/overview)
* **Java Client**: [https://github.com/APIstax/client-java](https://github.com/APIstax/client-java)
* **Quarkus Client**: [https://github.com/quarkiverse/quarkus-apistax](https://github.com/quarkiverse/quarkus-apistax)
* **PHP Client**: [https://github.com/APIstax/client-php](https://github.com/APIstax/client-php)

## Policies & Legal

* **Imprint**: [https://apistax.io/imprint](https://apistax.io/imprint)
* **Terms of Use**: [https://apistax.io/terms-of-use](https://apistax.io/terms-of-use)
* **Privacy Policy**: [https://apistax.io/privacy-policy](https://apistax.io/privacy-policy)

## Dashboard & Account

* **Dashboard / Login / Registration**: [https://app.apistax.io](https://app.apistax.io)

  * Manage API keys, quotas and subscriptions.
  * See usages

## Support

* **Support**: Contact details in the Imprint

## Optional

* **Blog**: [https://apistax.io/blog](https://apistax.io/blog)
* **Pricing**: [https://apistax.io/pricing](https://apistax.io/pricing)

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### Notes

* For fast LLM context, prioritize: **Available APIs**, **Documentation**, **OpenAPI spec**, and **Developer Resources**.
* Links in the **Optional** section are lower priority.