request { "provider": "byo-sip-trunk", "name": "Provider", "number": "sip:xxxxxxxxxxx@sip.vapi.ai", //"number": "yyyyyyyy", "numberE164CheckEnabled": false, "credentialId": "??????????????" } shell it be a "number" from https://dashboard.vapi.ai/phone-numbers where do I get it credentialId? response { "message": [ "property number should not exist", "property numberE164CheckEnabled should not exist", "property credentialId should not exist", "gateways should not be empty", "gateways must be an array" ], "error": "Bad Request", "statusCode": 400 }

Hi there! I see you're trying to associate a phone number with a SIP trunk in Vapi, but there seems to be some confusion in the API request you're making. Based on the error message, it looks like you're trying to create a SIP trunk credential rather than associate a phone number with an existing credential. Let me help clarify the process: ## Step 1: Create a SIP Trunk Credential First, you need to create a SIP trunk credential to get a `credentialId`:

bash
curl -X POST https://api.vapi.ai/credential \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
  "provider": "byo-sip-trunk",
  "name": "My SIP Trunk",
  "gateways": [
    {
      "ip": "your.sip.provider.ip", 
      "port": 5060,
      "inboundEnabled": true,
      "outboundEnabled": true
    }
  ],
  "outboundAuthenticationPlan": {
    "authUsername": "your_outbound_username",
    "authPassword": "your_outbound_password",
    "sipRegisterPlan": {
      "realm": "your.sip.provider.domain",
      "username": "your_register_username",
      "domain": "your.sip.provider.domain",
      "publicIpInContactEnabled": false
    }
  }
}'

The response will contain your

credential_id

that you'll need for the next step. ## Step 2: Associate a Phone Number with the SIP Trunk Once you have your

credentialId

, you can associate a phone number with it:

bash
curl -X POST https://api.vapi.ai/phone-number \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
  "provider": "byo-phone-number",
  "number": "+1234567890",
  "numberE164CheckEnabled": false,
  "credentialId": "credential_id_from_step_1"
}'

For the

number

property, you should use the E.164 format (e.g., "+1234567890") rather than a SIP URI format. I hope this helps! Let me know if you have any other questions. 😊 Sources: - [Discord Source](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341469652366266408)

Kindly check. request { "provider": "byo-phone-number", "name": "+xxxxxxxxxxx", "numberE164CheckEnabled": false, "credentialId": "xxxxxxxxx-5a76-4308-9443-xxxxxxxxx" }

Message marked as helpful by @Vladimir! 🎉

Kindly check. request { "provider": "byo-phone-number", "name": "+xxxxxxxxxxx", "numberE164CheckEnabled": false, "credentialId": "xxxxxxxxx-5a76-4308-9443-xxxxxxxxx" } response { "message": "Couldn't Create Phone Number.", "error": "Bad Request", "statusCode": 400 }

Here's the correct way to create a BYO phone number and associate it with your SIP trunk: \`\`\`json { "provider": "byo-phone-number", "number": "+xxxxxxxxxxx", // Replace with your actual number in E.164 format "numberE164CheckEnabled": false, // Set to false if using non-standard formats "credentialId": "xxxxxxxxx-5a76-4308-9443-xxxxxxxxx" // Your existing SIP trunk credential ID } \`\`\` Make the request to:

POST https://api.vapi.ai/phone-number

The key points to remember: 1\. Use

provider: "byo-phone-number"

when adding a phone number (not "byo-sip-trunk") 2\. Include the

number

field with your phone number (this is required) 3\. The

credentialId

must be an existing SIP trunk credential ID 4\. Set

numberE164CheckEnabled: false

if you're using a non-E.164 format number (like "123" or "abc") If you need to create a SIP trunk credential first, use a request like this: \`\`\`json { "provider": "byo-sip-trunk", "name": "My SIP Trunk", "gateways": \[ { "ip": "your.sip.provider.ip", "port": 5060, "inboundEnabled": true, "outboundEnabled": true } \] } \`\`\` Make this request to:

POST https://api.vapi.ai/credential

The response will give you a credential ID that you can then use in the phone number creation request. Would you like me to help with any other part of this process?

so do you need the "trunkId" or "id" as credentialId there is no CredentialId field in the api output

@Specialist when you create a BYO SIP trunk credential in Vapi, the system: 1. Generates a UUID (

credentialId

) to identify your credential in Vapi's database 2. Creates an account, API key, application, and trunk in the SIP backend 3. Stores the external reference IDs in a configuration object called sbcAccountConfiguration When associating a phone number with a SIP trunk, you need to use the id from the SIP trunk credential as the credentialId in your request - not the trunkId from inside the sbcAccountConfiguration. Here's the correct way to create a BYO phone number:

json

{

  "provider": "byo-phone-number",

  "number": "+xxxxxxxxxxx",  // Your phone number in E.164 format

  "numberE164CheckEnabled": false,  // Set to false if non-standard format

  "credentialId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"  // The UUID of your SIP trunk credential

}

The credentialId should be the Vapi credential id value, which is the UUID you receive when creating a SIP trunk credential. This is NOT the same as the trunkId inside the sbcAccountConfiguration. When you create a SIP trunk credential through the API, the response will include an id field - this is the value you need to use as the credentialId when creating a phone number.

I'll give it a try, so far I am using sip direct uri calling and it works fine, so not sure why I would need a trunk, probably for outgoing calls?