Hi there, I need to pipe in the originally intended target phone number in case a call was forwarded. Twilios webhook POSTs contain the following parameters representing the number: api.vapi.ai/twilio/inbound_call: CalledVia: String ForwardedFrom: String api.vapi.ai/twilio/status: ForwardedFrom: String I´ve reads all the docs, I think, am I assuming correctly, that you do not capture these values at the Vapi layer? Could´nt see them in you serverURL / webbhook logs. This means, I have to catch the Twilio initiation webhook call on our server first and "inject" the values into, probably, the metadata prop? Thanks a lot! 👋 Timo

Hi Timo! 👋 You're right - based on the information I found, Vapi does not automatically capture the

CalledVia

and

ForwardedFrom

parameters from Twilio webhooks. Let me explain what I found and how you can handle this. According to the information I found, Vapi's implementation only extracts specific parameters from the Twilio webhook payload, including

Caller

,

CallSid

,

To

, and

From

, but not

CalledVia

or

ForwardedFrom

. Here's what the code looks like:

python
def twilio_inbound_call(request_body):
    """Receive Twilio incoming call webhook and forward it to Vapi."""
    Caller = request_body.get("Caller", "")
    CallSid = request_body.get("CallSid", "")
    To = request_body.get("To", "")
    From = request_body.get("From", "")

Your approach is correct - you'll need to intercept the Twilio webhook on your server first and then pass the necessary information to Vapi. There are a few ways to do this: 1. **Set up your own webhook endpoint**: Instead of auto-registering your Twilio number with Vapi, you can [set up your own webhook endpoint](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1343397177182912553), process the call as needed (capturing the

CalledVia

and

ForwardedFrom

parameters), and then forward to Vapi using TwiML when required. 2. **Pass data using assistantOverrides**: You can use the

assistantOverrides

parameter with

variableValues

to pass the forwarding information:

javascript
vapiInstance = vapiSDK.run({
  apiKey: apiKey,
  assistant: assistant,
  config: buttonConfig,
  assistantOverrides: {
    variableValues: {
      calledVia: "yourCalledViaValue",
      forwardedFrom: "yourForwardedFromValue"
    }
  }
});

This way, the forwarding information will be available when Vapi calls your webhook. Is there anything specific about implementing this approach that you'd like me to clarify further? Sources:

Message marked as helpful by @tscdl! 🎉

Thank you. I wonder, when using the assistantOverrides-approach, is it still possible to have to call-agent-initiation to wait for the incoming override values? I imagine it could get messy if for some reason the overrides-delivering server is too slow to have delivered the data on call begin.

Message marked as helpful by @tscdl! 🎉

hey @tscdl checking if this is resolved for you?

Not really, the last question from 5:50pm is still open.

Oh yes, you're right. We don't set them by default, and you'll be given a total of 7.5 seconds to provide these variable values when an request comes to us over your server url. If you're getting this in time, it's definitely good.

Thanks very much. Can I change to solved status myself?

Marking this ticket as Solved ✅