Hey folks question that I could not find the answer to in the docs. If there is a call session and the caller provides an answer with some data on the call based on a question asked by the assistant), how does this data make it to the webhook? How is this stored in a “variable” such that it can be transmitted to the webhook? I understand passing variables to the call. I’m basically looking for the opposite. Thx!

Great question! In Vapi, when a caller provides data during a call session, that data is captured and stored in dynamic variables. Here’s how it works: 1. **Dynamic Variables**: Vapi allows you to use dynamic variables that can be set based on the caller's responses. These variables can be adjusted during the call to reflect the context of the conversation. 2. **Capturing Caller Responses**: When the caller answers a question, the response is stored in a variable. For example, if the assistant asks for the caller's name, the response can be stored in a variable like

callerName

. 3. **Webhook Transmission**: After the call, when it's time to send data to the webhook, you can configure the webhook payload to include these dynamic variables. For instance, you might send a JSON payload that looks like this:

json
   {
     "callerName": "John Doe",
     "orderStatus": "confirmed"
   }

4. **Triggering the Webhook**: The webhook is triggered based on specific call events, such as the end of the call or a particular status update. This ensures that the data captured during the call is sent to the webhook for further processing. 5. **Testing and Validation**: It's important to test the integration to ensure that the data is being captured and transmitted correctly. You can use tools like Postman to verify that the webhook is receiving the expected data. If you have any more questions or need further clarification, feel free to ask! 😊 Sources: - [Methods Vapi Uses to Store Caller Responses for Webhook Transmission](https://discord.com/channels/1211482211119796234/1211483291191083018/1335932034518089741) - [Detailed Report on Capturing and Sending Caller Data to Webhooks in VAPI](https://discord.com/channels/1211482211119796234/1211483291191083018/1333677676342284319)

How is the webhook triggered to send the variable data during the call? In the system prompt itself of the assistant?

Message marked as helpful by @niyogi! 🎉

hi

okay figured all of it out - not super obvious but tools calling and the descriptions within the tools makes the magic happen 😄

Hey @niyogi, checking if this is resolved for you.

yep all good here now @Shubham Bajaj