I need help with the following issue. How can a vapi assistant know during an inbound call, the phone number of the caller? I want to pass it through a dynamic variable so that the assistant knows the caller phone it can look up details on them immediately I also want to send the caller phone number on the end of call report to the webhook. Currently we don’t get the caller phone and this is a major piece of info Here is what i have set up so far: To include the phone number of the caller in your system prompt so that your assistant has access to it in real-time during the call, you can use dynamic variables in Vapi. Here's how you can do it: 1. In my system prompt, I included the caller's phone number, For example: The caller's phone number is {{caller_phone_number}}. 2. When starting a call, I need to pass the actual phone number value in the variableValues object within the assistantOverrides parameter. Here's an example of how your API request might look: json { "assistantId": "your-assistant-id", "assistantOverrides": { "variableValues": { "caller_phone_number": "+1xxxxxxxxxx" } }, "customer": { "number": "+1xxxxxxxxxx" }, "phoneNumberId": "your-phone-id" }

@Dennis It sounds like you're on the right track with using dynamic variables to pass the caller's phone number to the assistant. To ensure that the assistant knows the caller's phone number during an inbound call, you can use the

assistant-request

message type to retrieve the assistant based on the caller's phone number. Here's what you need to do: 1. When an inbound call is received, Vapi will send an

assistant-request

message to your server with the call object. 2. Your server should then respond with a JSON object containing the assistant and include the

variableValues

object with the

caller_phone_number

variable set to the caller's phone number. For example, your server's response might look like this:

json
{
  "assistantId": "your-assistant-id",
  "assistantOverrides": {
    "variableValues": {
      "caller_phone_number": "caller's phone number here"
    }
  }
}

To include the caller's phone number in the end-of-call report sent to the webhook, you'll need to ensure that your system captures this information during the call and includes it in the call report payload. If your current setup does not capture the caller's phone number, you may need to modify your call handling logic to include this information. If you need further assistance with setting this up or have any other questions, please let me know!

It literally comes in the call object? Have you not set this up to look at this?

i see it in the call object but i want to pass it to the assistant. Which is the problem.

Then just put it as the variable. it is literally that simple. I am not sure how you are automating your call process - it kind of sounds like you don't know (I could be wrong) Regardless the number that they are calling with or you are calling is always available to use as a dynamic variable.

this is my system prompt, i call the assistant - and i ask it - what's my phone number, it responds that it cant access this information or that it doesn't know. https://cdn.discordapp.com/attachments/1286747961023402095/1286794728485949550/image.png?ex=66ef347a&is=66ede2fa&hm=a950c068a702ae087f6f278530ec9159737e2da1bc2a92f2605bfb2c7a1eb6ce&

I would not be recommending something that does not work or I have not tried. I assume people have never came back with a comment because they tried it and worked.

you're very condescending. I did read the docs, and spent hours trying to figure this out, thats why im here...to get a direct answer from VAPI.

@Dennis you can do it by using trasient-based assistant. Check this video start from 28:09:

THANK YOU SAVANNAH! This is the route i was going down except hosting my function on AWS Lambda

Sure, I'm glad to help.

For anyone having this issue. I was able to get this working using a transient based assistant aka. TOOLS. I used pipedream to handle the webhook and server url, Thanks @Aurora

My guy just joined yesterday and said I wasn't helpful 🤣. I bet you were using the dashboard huh?

CONDESCENDING!!!

Not at all. It just funny and weird when people do what you do. I am one of the most helpful people in the Discord. You probally made a user error becuase you are new, thats fine. But don't to try blame that other stuff on me. Good luck with your VAPI journey my guy 🙂