CXone Outbound API: 403 Forbidden on Personal Connection call initiation

Trying to kick off an outbound call via the Personal Connection API. The docs say this endpoint is available for standard users, but I’m hitting a 403 Forbidden immediately on the POST.

POST /api/v2/outbound/calls
Authorization: Bearer <valid_token>
Content-Type: application/json

{
 "campaignId": "12345",
 "contactId": "67890",
 "agentId": "11111"
}

The token has full outbound permissions. Checked the logs, no specific error message in the body, just the standard 403. Is there a hidden scope requirement for this specific endpoint or is the Personal Connection feature disabled on the org level by default?