Integration guide
How to connect your own system to ePostman. The complete API reference, with schemas and a Try it button, lives in theinteractive documentation.
Getting started4 articles
Integration6 articles
- AuthenticationOAuth 2.0 with the client_credentials grant, required headers and the token lifecycle.1 min
- Sending documentsIdempotency, request constraints and the response when sending a document.8 min
- ValidationFive validation layers from XML to Slovak rules.3 min
- Receiving documentsPaginating the inbound document list and acknowledging receipt.1 min
- WebhooksRegistering webhooks, payload shape, signature verification and the event catalogue.4 min
- Pre-flight validationCheck an invoice and the receiver's reachability before you send it.3 min
Reference7 articles
- Document statesOutbound and inbound invoice lifecycle and what to do at each state.5 min
- EndpointsOverview of the SAPI-SK and Enterprise API endpoints, with a link to the interactive documentation.2 min
- Error codesThe SAPI error response shape and the full list of codes with HTTP status and retryability.2 min
- Limits & quotasRequest limits per plan, the RateLimit and RateLimit-Policy headers, the 429 response, document size and idempotency.5 min
- Document typesInvoiceTypeCode values and the Peppol profile each one maps to.1 min
- SupportHow to reach us about a problem, and what never to send us.1 min
- OpenAPI specificationWhere to download the machine-readable specification, how to generate a client from it and where to try the calls.1 min