Hey, I am creating an automation to create assistants. I would like to bind numbers to the assistants as well. I see documentation for creating numbers, require a credentials id property. I have already created an integration via UI for vonage as the main call provider. How do I get the credentials id so I can use it to create the number?

This usually trips people up. The credentialsId isn’t exposed directly in the UI; it’s tied to the integration you created (Vonage), so you’ll need to fetch it via the integrations/credentials endpoint or inspect the network call when the integration was created. Once you have that ID, you can pass it when creating the number and bind it to your assistant. If you want, I can help you trace it quickly and set it up end to end. Are you creating the number via API already, or still testing from the dashboard? @Marios

Hi, I understand you're looking for information about the

credentialId

when creating a phone number in Vapi. While I can't see exactly where to find it in the dashboard interface, I can definitely explain what it is and how it's typically obtained. The

credentialId

is an identifier for authentication credentials used when creating a phone number in Vapi. According to the [documentation](https://docs.vapi.ai/api-reference/phone-numbers/create#response.body.telnyx.credentialId), it's used to configure the number for sending inbound calls to Vapi, making outbound calls, and performing live call updates like transfers and hangups. Here's what I found about how the

credentialId

relates to the API key: 1. The API key is used for authentication when creating credentials in Vapi. When you make API calls to create credentials, you include your API key in the

Authorization

header. 2. The

credentialId

is generated when you create a credential via the API. According to the information I found, when you create a credential using the

/credential

endpoint, the response includes an

id

field, which is the

credentialId

you need:

{
  "id": "credential_id",
  "provider": "byo-sip-trunk",
  "name": "My SIP Trunk",
  ...
}

1. For Telnyx specifically, you would create a SIP Trunk Credential using a curl command like:

curl -X POST https://api.vapi.ai/credential \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer your-vapi-private-api-key" \
  -d '{
    "provider": "byo-sip-trunk",
    "name": "Telnyx Trunk",
    "gateways": [
      {
        "ip": "sip.telnyx.com"
      }
    ]
  }'

The response from this API call will contain the

credentialId

that you'll need when creating a phone number. Ref: https://docs.vapi.ai/advanced/sip

thank you @Matt, I am creating everything via api. I can do a reqest to capture the creds id mentioned

Thank you for the confirmation