Which out of the box integration based on survey responses allows external software to start workflows via HTTP requests?

The correct choice, JSON Event, enables external software to initiate workflows through HTTP requests based on survey responses. This integration facilitates communication between Qualtrics and other systems by sending structured data in JSON format whenever a certain condition is met in the survey, such as a response submission. The versatility of JSON allows it to be easily parsed by most programming languages, making it a powerful tool for integration.

Integrating workflows via HTTP requests means that, for instance, an external application can be programmed to trigger specific actions—like sending notifications, updating databases, or launching new tasks—immediately upon receiving a JSON Event from Qualtrics. This kind of real-time communication is essential for businesses that rely on quick responses to customer feedback or survey results.

Other choices may not serve the same purpose. Web Service Task, for example, might involve a server-side process but does not explicitly allow external initiation via HTTP requests based on responses. Ticket Summary relates more to summarizing the data collected rather than integrating with external systems for workflow management. Action Plan typically pertains to strategic planning based on data insights rather than facilitating real-time communication or responses through HTTP requests. Therefore, selecting JSON Event is the most suitable choice for triggering workflows externally based on survey interactions.