Cloud Native NAV API

Our Online Szamla Connector is a cloud-native integration framework designed to simplify and automate compliance with the Hungarian National Tax and Customs Administration's (NAV) Online Szamla system. This official system mandates real-time invoice reporting for all B2B and B2C transactions conducted by VAT-registered businesses operating in Hungary. Our solution enables companies to securely transmit invoice data to NAV with minimal setup and maintenance overhead, while remaining fully aligned with Hungarian tax law requirements. The service is ideal for businesses seeking seamless integration with their existing invoicing workflows, ERP systems, or custom applications deployed on AWS. At its core, the solution provides a robust middleware service capable of managing authentication, data validation, XML formatting, encryption, and communication with NAV's SOAP-based interface. By abstracting away the complex protocol and cryptographic requirements of the NAV Online Szamla API, the connector allows software teams to focus on their core business logic while ensuring full regulatory compliance. The framework supports versioned API compatibility, handles schema upgrades transparently, and includes logging and retry mechanisms to handle transmission failures or API changes. The platform is optimized for AWS and built with scalability, observability, and security in mind. It leverages AWS-native services - such as Lambda, SQS, Secrets Manager, and CloudWatch - to deliver a highly available and extensible architecture. Whether you're a Hungarian enterprise processing thousands of invoices daily or an international company operating subsidiaries in Hungary, Cheppers' Online Szamla Connector allows your systems to meet NAV requirements with confidence, speed, and flexibility. Comprehensive documentation, versioning support, and optional customization services are available to help teams accelerate onboarding and adapt the solution to their specific needs.

This product requires an internet connection to deploy properly. The following packages are downloaded on deployment:

• NVM v0.40.2
• Node v22 (installed by NVM)
• Lambda and WebUI source code is downloaded from seller's S3 bucket during deployment.

This product integrates with the Online Szamla API developed by the Hungarian National Tax and Customs Administration (NAV) to retrieve invoice data. To enable this functionality, it collects and stores user information - such as username, password, tax number, and signature key - using AWS Parameter Store within your own AWS account.