List of APIs

Make Shipping Easier

Select which APIs you’d like to integrate into your web site or software applications.

Ready to get started?
Step-by-step Integration Instructions for Experienced Developers

Hire a professional to help you integrate Web Tools APIs
View List of API Integrators

Address Information

Never get another address or ZIP Code™ wrong again with our address standardization city and state lookup APIs.

Quick Codes and Technical Documents

Tracking & Delivery Information

Get estimated delivery information and track packages until they arrive with Tracking & Delivery Information APIs.

Quick Codes and Technical Documents

Price Calculator

Calculate postage rates quickly and easily online for domestic and international shipping.

Quick Codes and Technical Documents

Print Shipping Labels

Print a complete shipping label with a tracking barcode to track packages seamlessly with one of our PC Postage® partners.

Quick Codes and Technical Documents

Package Pickup

Stop going to the Post Office™ to drop off your packages. With the Package Pickup API, you can submit a pickup request and we will pick up your packages for free.

Quick Codes and Technical Documents

Service Standards & Commitments

Get estimates on delivery and receive guaranteed Commitments with certain services.

Quick Codes and Technical Documents

Want to Hire a Professional Integrator?

Browse a list of E-commerce API Service Integrators who may be able to help you integrate USPS Web Tools into your software applications or web site.
View List of API Integrators