----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Dynamic Variables]() * [Inbound Calling]() * [Dashboard]() * [Glossary]() -----------------------------

### Answer It seems there might be a slight misconfiguration in how you're utilizing dynamic variables for your inbound calls with Vapi. To ensure the dynamic variable

{{callerName}}

is correctly populated in your assistant's greeting, you should use the

assistantOverrides

parameter to pass the variable values during the call setup. Here's how you can set it up correctly: 1. **Modify your server callback**: Ensure that your server retrieves the caller's name correctly and constructs a response that includes this name as a dynamic variable. 2. **Configure the Vapi call setup**: When setting up the call from your server, pass the caller's name in the

variableValues

of the

assistantOverrides

object. Here is an example of how your JSON payload should look when initiating the call:

json
{
  "assistantId": "your-assistant-id",
  "assistantOverride": {
    "variableValues": {
      "callerName": "Retrieved Name"
    }
  }
}

This setup ensures that when the Vapi assistant receives the call, it dynamically inserts the caller's name into the greeting message. For more details on how to use dynamic variables effectively in your scenarios, refer to the Vapi documentation on dynamic variables in calls [(1)]() . If the issue persists after adjusting your setup according to the guidance above, it might be useful to review the exact payload and response data between your server and Vapi to ensure the correct values are being passed and recognized.

Got it. Tagging @User for additional help.

The dynamic aspect would be getting the caller's name from a database using the incoming phone number

Ok i might have not explained fully, the screenshot above is just an example, driver_name will be populated with an actual value, but even if i hard code it now, it still won't be recoginized by vapi

so it actually doable or is it a restriction on the api level?

and dynamic variable can only be done with outbound calls?

lets assume it is, but still not workin no

----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Dynamic Variables]() * [Server URLs]() * [Server Events]() * [Get Call]() -----------------------------

### Answer To correctly implement dynamic variables such as

{{callerName}}

during inbound calls with Vapi, you need to ensure that the dynamic variable is being set appropriately using the

assistantOverrides

functionality as part of the call setup. When Vapi initiates a call and contacts your server URL, your server should respond with the necessary

assistantOverrides

that include

variableValues

. This setup should include the dynamically determined

callerName

. Here's a detailed guide on how you might configure this: 1. **Server Configuration**: Your server should handle the POST request from Vapi and look up the caller's name using the incoming phone number. After retrieving the name, respond with an

assistantOverrides

JSON object that includes the

callerName

variable. 2. **Vapi Call Setup**: Ensure that your call setup JSON includes the

variableValues

with

callerName

correctly set from your server's response. Here’s an example of how your server might respond to Vapi when it sends a POST request to your Server URL:

json
{
  "assistantOverrides": {
    "variableValues": {
      "callerName": "John Doe"
    }
  }
}

This response tells Vapi to replace

{{callerName}}

with "John Doe" in the assistant's greeting message. Ensure that your assistant’s first message is configured to use this variable, like so: "Hello {{callerName}}, how can I help you today?" If this setup is correctly implemented but the variable is still not being replaced, it would be beneficial to check the logs for the exact JSON payload being sent to and from Vapi. This will help in identifying if the variable is being passed correctly and whether the assistant configuration on Vapi’s dashboard is set up to utilize this variable appropriately. For more detailed instructions and possibilities with dynamic variables and assistant interactions, refer to the Vapi documentation on utilizing dynamic variables in phone calls [(1)]() .

Got it. Tagging @User for additional help.

I don't think it was because i had an assistant selected and i found this written when i deselected it

i assume thats the write track?

Just check this out; you will understand it.