What are the main tools or functionalities provided by the Developer Portal?
Through the Developer Portal, users can access:
- A Support page, which includes guidance and support information on the Developer Portal functionalities
- The SDK page, used for testing the compliance of XML files with the e-invoicing requirements
- The Portal-based validator page, which enables nontechnical users to check the compliance of XML files by uploading them to the Portal
- The Integration Sandbox, which allows developers to test the integration of their systems with a Sandbox environment"