Open Source
Building openly,sharing knowledge.
As we develop our ERP system, we release parts that can help the wider community as open source. We believe that sharing knowledge raises the entire ecosystem.
Public API
In developmentAn API for integrating SmartAccount features into your applications. Automate invoicing, fiscalization and synchronization with external platforms.
Features
- eInvoices - generation and delivery
- Fiscalization 1.0
- Stripe integration
- Shopify integration
- Downloadable OpenAPI schema
MCP Server
ActiveA Model Context Protocol server connecting AI assistants to your accounting data. Read-only access to clients, invoices, transactions and more.
Features
- Access to client and invoice data
- View bank transactions and balances
- Product and service catalog
- Read-only access — no data changes
- Bearer token authentication
Exchange Rates API
ActiveA free public API for retrieving Croatian National Bank exchange rates. A simple REST endpoint for integration into your applications without authentication.
Features
- Daily CNB exchange rates
- Historical exchange rates
- JSON response format
- No authentication
- Free to use
ex_cius
ActiveAn Elixir library for generating UBL 2.1 (Universal Business Language) invoices in accordance with the Croatian eInvoice specification (CIUS-2025).
Features
- UBL 2.1 compatible XML invoices
- Croatian eInvoice support
- Comprehensive input validation
- VAT calculations and tax categories
ex_fiskal
ActiveAn Elixir library for integrating the Croatian fiscalization system. Generate ZKI (Issuer's Security Code) and prepare invoices for fiscalization.
Features
- Working with FINA certificates
- Invoice fiscalization
- ZKI generation
- Ready for CIS integration
ex_certilia
PlannedAn upcoming Elixir library for integrating Certilia.com as an authentication provider. Use Croatia's digital identity infrastructure in your applications.
Features
- Certilia OAuth integration
- Digital identity verification
- Secure authentication flows
- Croatian identity card support
Why open source?
Developing software for the Croatian business ecosystem often requires solving the same problems repeatedly. Fiscalization, eInvoices, digital authentication - every developer faces the same challenges.
By publishing our libraries as open source, we aim to lower barriers to entry and help others build quality solutions faster. All projects use the MIT license and can be freely used in commercial applications.