Which endpoints can a webhook be sent to in the form of an http message?

The correct choice refers specifically to another Quick Base app. When a webhook is set up in Quick Base, it is designed to send HTTP messages to a designated endpoint that can handle and process those messages according to the application's needs.

Within the Quick Base ecosystem, it is common to send webhooks to other Quick Base applications where those applications might need to perform specific actions such as updating records, triggering workflows, or synchronizing data. This kind of integration leverages the capabilities of Quick Base to improve automation and streamline processes between apps, enabling a seamless flow of information within the platform.

While webhooks can technically send messages to various endpoints, including third-party services, the efficiency of automated processes is most direct when aimed towards another Quick Base app. Other endpoints, such as external applications or vendor services, may not be specifically designed to receive or interpret the data formats that Quick Base generates, which is why the choice of sending it to another Quick Base app is more relevant in the context of the question.