Silent Authentication Updates in Verify API

Vonage has announced enhancements to the Silent Authentication feature in the Verify API, aimed at improving the developer experience and providing more control over authentication flows. Key updates include the introduction of a new boolean parameter, coverage_check, which allows developers to choose between synchronous and asynchronous network validation, thus reducing unnecessary redirections and providing immediate feedback on unsupported networks. Additionally, network registration is becoming mandatory for live Silent Authentication requests to enhance carrier integrations and minimize failed authentication attempts. The sandbox parameter is being deprecated in favor of the Network Registry Playground, which offers a more realistic testing environment with live traffic and virtual operator support, requiring developers to migrate their testing processes accordingly. These changes are set to take effect by May 1, 2026, at which point coverage_check becomes the default, network registration becomes mandatory, and the use of sandbox=true will result in an error, prompting developers to prepare their applications for these updates.