REST API v1
Guides
The documented interface is in developer preview. Hosted test and live API requests are not generally available.
Domestic shipping
Start with a quote for a same-country route.
International shipping
Customs data is part of the booking, not a label afterthought.
Multi-parcel shipments
One quote request can describe the whole consignment.
Customs
Specific, accurate item data prevents avoidable booking failures.
Error handling
Branch on stable codes and retain the request ID.
Idempotency
A network retry must not become a second label.
Webhook verification
Authenticate exact bytes, acknowledge quickly and deduplicate by event ID.