See how APIstax structures 8 comprehensive sections for AI discovery
APIstax offers secure REST APIs for generating PDFs from HTML, creating QR codes, and validating VAT, all tailored for developers seeking reliable solutions.
Readers can learn about the practical implementation of REST APIs through APIstax's offerings, including detailed documentation and user-friendly features. This case study highlights how developers can leverage these tools to streamline documentation and payment workflows effectively.
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# 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)
---
### Notes
* For fast LLM context, prioritize: **Available APIs**, **Documentation**, **OpenAPI spec**, and **Developer Resources**.
* Links in the **Optional** section are lower priority.
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