no you cannot call 2 numbers but instead use your server logic to tell Vapi which number call to transfer to 1. go to your assistant > advance section > transfer-destination-request 2. go here https://api.vapi.ai/api-json#

components > schemas > ServerMessageTransferDestinationRequest

to check request type 3. check

ServerMessageResponseTransferDestinationRequest

on how to return the response for transfer request - no you don't have to create the function