CXone Personal Connection API outbound call returning 400 Bad Request

NICE CXone API & Integrations
1

Trying to trigger an outbound call via the Personal Connection API in CXone. Using the Node.js SDK. The call object looks valid, but I’m getting a 400 Bad Request with ‘Invalid phone number format’. We’ve verified the number is E.164 compliant. Here’s the payload:

{
 "from": { "phoneNumber": "+819012345678" },
 "to": { "phoneNumber": "+15551234567" },
 "campaignId": "abc-123"
}

Any idea why the API is rejecting this?