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How to set up USPS

Step-by-step guide to setting up how to USPS.

2 min readUpdated August 3, 2025
  • United States Postal Service (USPS) delivers parcels throughout the United States of America.
  • Starshipit's integration with USPS allows you to ship both domestically and internationally ex: the United States of America.
  • USPS integration with Starshipit allows you to generate packing slips and shipping labels, sending branded tracking notifications and updating your eCommerce platform, Warehouse Management or Inventory Management system with tracking information.

Before you begin

To integrate USPS with your Starshipit account you will need to have an EasyPost account. You can sign up for EasyPost here.

How to set up USPS

  1. In Starshipit, navigate to Settings > Couriers > USPS.
    Please note your shipping from country will need to be United States.
  2. Tick Enable USPS.
  3. Enter your EasyPost API Key.
  4. Enter your EasyPost USPS Account ID.
  5. Click Save.
  6. Click Test to ensure it works to ensure your credentials are valid.
  7. Add your USPS Product codes.

Available products

When using USPS with Starshipit, you can access a range of domestic and international shipping options to suit your delivery needs. Below is an overview of the available USPS services supported by Starshipit, including key features and delivery timeframes.

Domestic Services

Ground Advantage

  • Used for domestic packages under 70lbs
  • Fully tracked with delivery confirmation
  • Cost-effective option for non-urgent shipments

Priority Mail

  • Delivery in 1-3 business days
  • Free boxes and envelopes available
  • Includes tracking and insurance coverage up to $100

Priority Mail Express

  • Fastest USPS service with overnight delivery to most locations
  • Includes tracking, insurance and money-back guarantee

International Services

Priority Mail International

  • Delivery in 6-10 business days to over 180 countries
  • Tracking included for most destinations

Priority Mail Express International

  • Delivery in 3-5 business days to many countries
  • Includes tracking and insurance coverage up to $200

Additional features

Using USPS via EasyPost integration with Starshipit allows users to select 'Signature Required' or 'Authority to Leave' on delivery.

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