# e-Invoicing Document Interchange API Specification

The Public REST API provides programmatic access to an e-invoicing platform operated by a certified service provider, enabling companies to securely send, receive, and manage electronic invoices and related business documents via automated document interchange.

This OpenAPI-based specification describes all available endpoints for integrating your ERP or other business applications with the service provider’s platform, including onboarding, invoice submission, status tracking, document retrieval, and reporting.

To use the API, you must obtain access credentials from your chosen service provider.

### Generating client libraries

You can generate strongly typed client libraries for various programming languages using the provided `openapi.yaml` file and the [OpenAPI Generator](https://openapi-generator.tech/).

1. Download the `openapi.yaml` (or `openapi.json`) file from this site.
2. Install the OpenAPI Generator following the instructions on the project website.
3. Run the generator for your preferred language. For example, to generate a Java client:



```bash
   openapi-generator-cli generate \
     -i openapi.yaml \
     -g java \
     -o ./einvoice-java-client
```

Replace java with the desired generator (for example: typescript-axios, csharp, python) and adjust the output directory as needed.

Current version 2025.09.3014