In my service, I have a buy_car function that is bound to assistants through the apiRequest tool. I have multiple assistants, and when these assistants call buy_car through apiRequest, how can I obtain the assistant_id to distinguish between different assistants?

To distinguish which assistant called your

buy_car

function via the apiRequest tool, inspect the payload your service receives—look for the

call

object, which typically includes an

assistantId

field. For example:

json
{
  "message": {
    "type": "function-call",
    "call": {
      "assistantId": "your-assistant-id-here",
      // ...other call details
    },
    // ...other message fields
  }
}

Use

call.assistantId

in your handler to identify the calling assistant. Reference: [Outbound Sales Example – Handle function calls](https://docs.vapi.ai/examples/outbound-sales#handle-function-calls) Source: - [Outbound Sales Example – Handle function calls](https://docs.vapi.ai/examples/outbound-sales#handle-function-calls)