Subscribe to Entity News
Creates or refreshes a webhook subscription to news newly linked to one entity. A new endpoint must echo a signed verification challenge before the subscription exists.
Authentication
Your aVenture API key (https://aventure.vc/settings/api-keys) or OAuth access token
Request
Opaque watermark from an earlier grant or event to resume after; null starts a new subscription from now and keeps an existing subscription's position.
Requested subscription lifetime in milliseconds; the server caps it.
Response headers
Requests allowed per client IP in the current rate-limit window.
Requests left before the tightest applicable rate-limit bucket rejects.
Seconds until the exhausted rate-limit bucket admits another request; 0 when none is exhausted.
Response
Stable subscription id; sent as X-MCP-Subscription-Id.