Activate shipping with USPS

If you have negotiated discounted shipped rates through your own account with USPS, then you can display your discounted shipping rates to your customers at checkout. To display your negotiated rates, you need to have the carrier calculated shipping feature on your Shopify account. For more information, refer to Third-party carrier-calculated shipping rates.

Register for a USPS User ID

Register for a USPS Web Tools user ID by filling out the USPS Web Tools registration form.

When you have completed the signup process, USPS mails you a user ID. Make a note of this, as you need your USPS user ID to complete the activation in Shopify.

Your USPS Web Tools user ID is a combination of letters and numbers, for example 123ABCDE1234, that is automatically generated by USPS.

The user ID gives you access to package tracking, rate, and service delivery standards APIs with USPS when you register.

After you connect your account, USPS commercial rates are shown at checkout by default. USPS commercial rates are less expensive than the retail rates and the labels must be purchased online. If you want to display the more expensive rates, then you can enable the retails rate when you add USPS calculated rates.

Activate calculated shipping for USPS

  1. In the Accounts and integrations section, click Manage integrations.
  2. In the Carrier accounts section, click Manage carriers.
  3. Next to USPS, click Connect account.
  4. On the Connect USPS dialog, enter your USPS credentials.
  5. Select whether to add USPS rates to your existing shipping zones. This replaces your current USPS rates and adds them to all shipping zones, even those that you don’t currently use for USPS rates.
  6. Click Save.

If you didn't choose to add USPS rates to your shipping zones during the account set up, then create carrier-calculated rates to add USPS rates to your checkout.

Deactivate USPS

If you no longer want to use USPS (for example if your account with them has expired), then you need to make sure the service isn't offered to your customers at checkout.

Steps:

  1. In the Accounts and integrations section, click Manage integrations.
  2. In the Carrier accounts section, click Manage carriers.
  3. Next to USPS, click Disconnect account.
  4. In the dialog, click Disconnect account to confirm the deactivation.

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