SEND Packages API

Use webhooks to react to parcel lifecycle changes without polling. Retrieve current quote or parcel state through the API after receiving an event — events notify, the API is the source of truth.

Lifecycle stage	Event
Parcel created (warehouse receipt)	`parcel.created`
Tracking milestone changes	`tracking.{step}`
Booking confirmed	no event yet — poll the quote
Quote cancelled	no event yet — poll the quote

Only the events above are currently emitted. Additional lifecycle coverage is tracked as implementation work, not documented as available.