Please refer to documents provided by Unimaze:

• MAPI Guided Tour - Message Services.pdf
• MAPI Guided Tour - Transaction Services.pdf
• MAPI Guided Tour - Specific use for Croatia.pdf
• Croatia - Onboarding Guide.pdf

All the material that so far has been provided directly from our onboarding support, will be available here in 2026 Q1. We are gradually adding material, please bear with us and feel free to contact us at any time.

📘

Inbound and outbound invoices are fiscalized automatically.

📘

Please keep in mind that you need at least to mark the inbound MLR and MLA response document as being imported (see "Mark message as delivered" below), even though you do not intend to process them (fetch the tax evidence from MLAs for example).

📘

Please refer to "Additional information" section on https://mapi-sandbox.unimaze.com/apidocs/index.html as these have not yet been migrated.

Links

General

• MAPI API (refreshed 30.12.2025)

Transaction services (outbound)

• Submit invoice transaction or Correct with credit transaction
• Attach a document e.g. PDF file
• Get status of message - verify it has final state Sent, NotProcessed (e-mail delivery) or Failed.

Transaction services (inbound)

• Get information on onbound messages - With status=pendingDelivery, transfer=inbound
• Fetch core document or Fetch document by index
• Mark message as delivered (imported into ERP)

Fiscalization actions

• Register a payment (by supplier)
• Register rejection (by customer)