Public API
In development
An API for connecting SmartAccount features to your applications: eInvoices, fiscalization and integrations with external platforms.
Planned: Stripe, Shopify and an OpenAPI schema.
For developers
APIs, documentation and open-source libraries for connecting to our platform and building applications for Croatian businesses.
APIs and integrations
03MCP Server
Active
Connect AI assistants to accounting data: clients, invoices, bank transactions and the product catalogue.
Read-only access, no changes to data.
Exchange Rates API
Active
A public API for daily and historical Croatian National Bank exchange rates. Free access to data without authentication.
Libraries
03ex_cius
Active
Generate UBL 2.1 XML invoices using the Croatian CIUS-2025 eInvoice specification, with input validation and VAT calculations.
ex_fiskal
Active
A library for Croatian fiscalization: working with FINA certificates, generating ZKI codes and preparing invoices for CIS integration.
ex_certilia
Planned
A planned library for connecting to Certilia.com: OAuth authentication and digital identity verification in your application.