The USPS Web Tools® API library gives ecommerce website shopping carts and shipping software access to valuable USPS® data—free of charge! You can check shipping rates, track packages, and schedule a package pickup all through USPS Web Tools. Get started now or read on to learn more.
Shipper Support Center
USPS Web Tools are ecommerce application program interfaces (APIs) that can be used for online stores or customer service centers—free of charge.
Ecommerce Website Support
Get access to our Web Tools through a simple registration process.
Once registered, you’ll receive an email with your assigned Web Tools User ID. You’ll then have access to the most popular APIs. For access to more secure APIs, like Label Printing, you’ll need additional permissions. Contact the Internet Customer Care Center with the following information:
“Web Tools API Access” in the subject line of the email
The software vendor you are using
Which APIs you want to access beyond those provided automatically
Want to hire a professional?
To assist companies that need help integrating USPS Web Tools into their sites, the Postal Service™ publishes contact information for some companies willing to provide services that meet our criteria. These lists are not exhaustive and being listed is not an endorsement by USPS.
USPS Web Tools Integrators
Some companies that may be able to assist with the integration of USPS Web Tools or help you build a customer solution using Web Tools ecommerce APIs.
Send Mail & Packages
Convenient Domestic Shipping
Want to save time and ship from home? Use Click-N-Ship® service to pay for postage and print a shipping label from your printer or at a Post Office™ location. Plus, you can schedule a USPS® pickup from your home or office.1
With the USPS Loyalty Program, small businesses can now earn credits for Priority Mail® and Priority Mail Express® labels printed with Click-N-Ship.
Print a Label Click-N-Ship
Find a Location
Search for Post Offices™ and other locations to buy stamps, ship packages, apply for passports, and more.
Determine how much postage or how many stamps you need for your letter or package based on size, weight, and destination.
Look Up a Zip Code ™
Find a ZIP Code™ by street address or city and state to make sure your mail arrives at the right place.
Shipping & Mailing with USPS
Order Free Supplies
Start your shipping with free Priority Mail® and Priority Mail Express® envelopes and boxes, and other supplies.
Browse our collection of postage stamps. Find stamps by theme, color, season, mail service, and more.
Schedule a Pickup
Get a free package pickup during your regular mail delivery or pay a fee for a pickup at a time that works for you.