Virtuoso QA seamlessly tests both APIs and user interfaces within a single testing framework, allowing an entire business transaction to be assessed in one continuous flow. API requests can be customized with headers, body content, query parameters, authentication details, and mappings for both inputs and outputs. Additionally, Postman collections can be directly imported for convenience. The responses obtained from API calls can be stored as variables for use in subsequent UI or API actions. Touchstone, the intelligent layer of Virtuoso, employs AI agents to execute, troubleshoot, and fix these tests. In the event of a test failure, Touchstone categorizes the issue and suggests a solution, with all modifications requiring human consent prior to being made live. All alterations are tracked and can be reverted. Tests are executed on a reliable execution engine hosted on managed cloud infrastructure and are compatible with CI/CD pipelines, ensuring that API validations occur with every release in conjunction with comprehensive regression testing.