USPS Shipping Infrastructure

Ship with one API call.

Address validation, rate quotes, labels, tracking, pickup scheduling — clean JSON, no SOAP, instant access.

Try it — no signup needed

8 free endpoints — address, rates, service standards, locations, claims, international pricing

Address Validation DPV confirmation, ZIP+4, business/residential

Rate Quotes Domestic + international, all mail classes

Label Creation Workflow-based, PDF/ZPL output

Package Tracking Real-time status from USPS scan events

Pickup Scheduling Check, schedule, cancel carrier pickups

Service Standards Transit times by origin/destination/class