Focused APIs for reliable digital workflows.

Cresona develops small, purpose-built API products with clear inputs, deterministic processing where possible, and explicit limitations.

Products

Swedish Business & Payment Number Validator API

Checks structure and checksum for:

Swedish organisation numbers
Bankgiro numbers
Plusgiro numbers

Limitation: Structural validation does not verify that an organisation or payment account exists, is active, belongs to a specific party, or that a payment will be accepted.

Swedish Peppol Invoice Preflight

Performs a defined Swedish Peppol invoice preflight subset.

Limitation: It is not a complete Peppol BIS Billing, EN16931, accounting, tax, or legal validity validator.