Hi All: I am trying to add the assistantId to a tool call. The tool is called from multiple assistants so I need to know on the other end which assistant used the tool so as to return the right information. But I did not find a way to "inject" the assistandId into the tool call. Is there a way to do this? Thanks!

Use message.call.assistant.id from the webhook payload no need to manually inject the assistant ID..

Thank you for your message. I can get that in the end-of-call message, but the webhook does not include that data... Here is all the input I get when receiving a tool call on my server: GET Parameters: { "api": "vapi_prefetch" } POST Parameters: [] REQUEST Parameters: { "api": "vapi_prefetch" } Raw Input Length: 22 Raw Input: {"from":"017xxxxxxxx"} Raw Input (JSON Decoded): { "from": "017xxxxxxxxx" }

The vapi_prefetch webhook doesn’t include assistantId because it runs before the assistant is initialized, use the end-of-call webhook or store the assistantId when creating the call to match it later..

Thanks for your reply. The prefetch is actually not running before. Bad name I am afraid. Its a tool which gets called by the assistant. so the assistant is already initialized, but the id does not get sent along.

Check your tool and webhook configurations in vapi to ensure assistantId is passed, review logs for missing data..