E1405. Feature not available on your plan
Severity: ERROR. A billing gate, not an authentication failure.
What happened
The backend rejected the request with HTTP 403 and code
FEATURE_NOT_AVAILABLE: the feature this endpoint serves (for
example coding hooks or the Scout agent, both Teams-tier) is not
included in your organization's current plan. This is a billing
gate, not an authentication failure -- the API key or machine
signature was accepted.
How to fix
Upgrade the organization's plan in the dashboard (Settings >
Billing, or the upgrade_url field in the error body). The
response's feature and tier fields name the gated feature and
your current plan.