How does Workbench enhance API testing features?

Workbench enhances API testing features primarily through customizable SOAP headers and debug logs. This functionality is crucial because it allows users to tailor their API requests with specific headers that can influence behavior or pass necessary information, such as authentication tokens. The ability to customize SOAP headers can help in testing different scenarios and ensuring that the right parameters are sent with the requests.

Debug logs are also essential for troubleshooting API interactions. They provide detailed insights into the request and response cycles, which helps users identify issues or confirm that their API calls are functioning as expected. This level of detail supports developers and integration architects in debugging and refining their API interactions efficiently.

The other options do not accurately reflect how Workbench enhances API testing. Limited functionality, such as allowing only GET requests or restricting access to one API version, would severely hinder testing capabilities. Similarly, while a user-friendly interface is beneficial, the presence of robust features like customizable headers and debug logs is what truly elevates the capabilities of Workbench in API testing.