Delivery Information APIs  
Check service standards or verify delivery status.
Our Track & Confirm and Service Standards Web Tools help take the mysteries out of deliveries.
 
Track & Confirm
Track any package shipped via Express Mail, Global Express Guaranteed, or Global Express Mail®. Check the delivery status of packages shipped with Delivery Confirmation™ service, Signature Confirmation™ service, Certified Mail or Registered Mail.

Service Standards
(A) Priority Mail®
In your shopping cart or at your customer service center, you can request transit time standards for Priority Mail® service between any two 5-digit ZIP Codes™. You get an average delivery standard for two- or three-day service.

(B) Package Services
Provides estimates on delivery between 3-digit ZIP Codes for Parcel Post, Library Mail and Media Mail. Your e-shoppers will know up front the expected delivery times without having to call your customer service center.

(C) Express Mail Service Commitments
Receive our guaranteed commitment between any two 5-digit ZIP Code™ for Express Mail®. Delivery is guaranteed for next-day by 10:00am, noon, or 3:00pm, or by second day, including Saturday and Sunday, or your money back. Choose from up to 200 drop off locations and drop off times. Plus, obtain guarantee delivery time for future mailings.

  Technical Guides
Download instructional guides to learn more.
Go To Technical Guides

  Service Providers
Need assistance with integrating? Use a service provider.
Go To Service Providers

  Access Web Tools
Register now to begin using the USPS Web Tools.
Sign up for Web Tools.