Validate Address
USPS Address Standardization API
API Response
Standardized address result
Enter an address to validate
Results will appear here
Calling USPS Address API...
POST /v3/addresses/validate
Standardized Address
ZIP+4
County
Delivery Point
Carrier Route
Rate Calculator
USPS Domestic Rate API
Available Services
Rates and estimated delivery times
Enter package details
Rate comparison will appear here
Fetching USPS rates...
POST /v3/total-rates/search
Commercial
Rates effective as of Feb 2026. Subject to dimensional weight pricing.
Track Package
USPS Package Tracking API
Quick test numbers:
Tracking History
Package movement timeline
Enter a tracking number
Timeline will appear here
Fetching tracking data...
GET /v3/tracking/
Origin
Destination
Service
Generate Label
USPS eVS Label API
F From Address
T To Address
Label Preview
4x6 thermal label format
Fill in addresses to generate
Label preview will appear here
Generating shipping label...
POST /v3/label/create
USPS Postage Paid
Ship Date
FROM:
SHIP TO:
Label ID:
Latency
Uptime
Recent API Activity
Last 24 hours
30-Day Uptime
Service availability history