POST /api/v2/conversations/calls 403 when placing outbound call for agent

Hey folks,

Trying to kick off an outbound call on behalf of an agent using the Conversations API. I’ve got the OAuth token set up correctly for the integration, and I can list active conversations without issue. But as soon as I hit POST /api/v2/conversations/calls, I’m getting slammed with a 403 Forbidden.

Here’s the payload I’m sending:

{
“type”: “voice”,
“to”: [{“phoneNumber”: “+15550100”}],
“from”: {“phoneNumber”: “+15550199”},
“owner”: {“id”: “agent-id-here”, “type”: “user”}
}

The integration has the conversations:call:write scope. Am I missing a specific permission on the user or the integration itself?