How to connect USPS v2

Discover here how to connect your USPS v2 account to ShippyPro!



  1. Before you start

  2. Connection steps

  3. Supported services
  4. Additional options

  5. Troubleshooting & Errors



1. Before you start

 To connect the carrier, you need to first ask your USPS Sales Person for credentials such as Client ID, Client Secret, Account Number, CRID, MID, and Manifest MID.

2. Connection steps

Then you can insert the credentials in the Carriers page, clicking on the USPS logo.

If you can't figure how to do it try to take a look at the following example:


Screenshot 2024-07-12 alle 10.02.13

3. Supported services

Parcel Select > Reliable delivery for packages weighing up to 70 lbs.

Parcel Select Lightweight > Cost-effective delivery for lightweight parcels weighing less than 1 lb.

USPS Connect Local > Fast local delivery for same-day or next-day service.

USPS Connect Regional > Efficient regional delivery service.

USPS Connect Mail > Convenient service for mail delivery.

USPS Ground Advantage > Affordable ground delivery service for packages weighing up to 70 lbs.

USPS Connect Same Day > Same-day delivery service for urgent packages.

USPS Connect Next Day > Next-day delivery service for time-sensitive packages.

Priority Mail Express > Fastest domestic service for delivery within 1-2 days.

Priority Mail > Reliable and affordable service for delivery within 1-3 business days.

First-Class Package Service > Economical service for packages weighing up to 15.99 oz.

Library Mail > Special mailing service for educational materials.

Media Mail > Cost-effective service for shipping media items.

Bound Printed Matter > Economical service for bound printed materials.

Domestic Matter for the Blind > Free mailing service for the visually impaired.

4. Additional Options

Besides your credentials, you'll also see some further options, let's take a look at them!

Label Type gives you the possibility to choose the correct label format for your printer.

Test Mode lets you make some test shipments.

The "Test Mode" option should be flagged only if you have test credentials, not production ones!

If you want, you can also enter a Custom Label to recognize the connection among all the others.

Parcel Type allows you to specify the type of parcel you are shipping.


5. Troubleshooting & Errors

Internal Server Error

Check if your USPS connection is in Test Mode.

State not transmitted

Ensure to fill the "State" field for both origin and destination addresses.