VAPI•2w ago

Validation Error on outbound call to Brazil number

I am trying to initiate an outbound call but the API is giving me an error with the number format. I checked the number and its fine. It seems like there is an issue in the way VAPI validated the number. This is a number from Brasil

The number format is: +55 xx xxxx xxxx

Vapi Support BotAPP•12/8/25, 11:42 PM

To resolve the validation error for your Brazilian number, try disabling strict E.164 validation in your API request by adding "numberE164CheckEnabled": false"numberE164CheckEnabled": false to the customercustomer object. For example:

{
  "customer": {
    "number": "+5511999999999",
    "numberE164CheckEnabled": false
  }
}

{
  "customer": {
    "number": "+5511999999999",
    "numberE164CheckEnabled": false
  }
}

This should allow the call to proceed even if the number format is not strictly E.164 compliant.
Reference: See the Outbound Calling documentation for more details.

Source:

Outbound Calling Documentation

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VVapi Support Bot To resolve the validation error for your Brazilian number, try disabling strict ...

DuckieAPP•12/9/25, 11:02 AM

Message marked as helpful by @hassaanz!

VapiAPP•12/10/25, 12:46 PM

Hi hassaanz,

To address the issue with number validation for Brazilian numbers in your API requests, you should disable strict E.164 validation by adding "numberE164CheckEnabled": false"numberE164CheckEnabled": false to the customercustomer object. Here's an example:

{
  "customer": {
    "number": "+5511999999999",
    "numberE164CheckEnabled": false
  }
}

{
  "customer": {
    "number": "+5511999999999",
    "numberE164CheckEnabled": false
  }
}

This adjustment should allow the call to proceed even if the number format isn't strictly compliant with the E.164 standard. For further details, you can refer to the Outbound Calling Documentation. Let us know if you need further assistance.

Validation Error on outbound call to Brazil number

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