USPS Priority Mail and Priority Mail Express
Outcome
You will learn how to tell returned USPS Priority Mail and USPS Priority Mail Express Rates apart, and how to carry the one you choose through the standard Label workflow.
Neither service adds a public endpoint, request field, or response field. The mechanics are the carrier-generic ones described in USPS with Mailhub.
When to use this guide
Use this guide when a returned Mailhub Rate identifies USPS Priority Mail or USPS Priority Mail Express.
This page is context for a Rate you already have, not advice about which service to ship with. Mailhub publishes no comparison between the two, and a returned Rate is the only evidence of what a Shipment can use.
If you are still assembling the Rates request itself, start from Get Shipping Rates.
Identify the returned service
Distinguish the two by the exact returned serviceName, not by a name your
application supplied:
Returned serviceName | Service |
|---|---|
USPS Priority Mail | Priority Mail |
USPS Priority Mail Express | Priority Mail Express |
The handling is identical for both. The distinction is the returned value your application records, so a later Label or reconciliation step can report which option the Shipment actually used.
Read serviceCode from the response instead of hard-coding one. See
Identify a returned USPS service
for the full recognition example and the other known service names.
Buy and manage the Label
Retain the returned Rate id of the option you chose, then follow the canonical
guides — they remain the complete reference for each request and response, and
this page does not restate them:
Record the returned serviceName alongside postageLabel.id so later reporting
reflects the option the Shipment used rather than one assumed at build time.
Mailhub publishes its own platform requirements for a Shipment — see Requirements & Restrictions. USPS may apply additional service-specific eligibility or restrictions that Mailhub does not publish.
Next steps
- USPS Ground Advantage for the other known USPS service name.
- USPS with Mailhub for the shared USPS mental model and the current public boundaries.