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USPS Account Integration: ShipRush

Overview

Shipbridge supports USPS label generation through its built-in integration with ShipRush. In this configuration, Shipbridge transmits USPS shipment requests via API to ShipRush. ShipRush then validates the shipment and returns the generated USPS label.

In this article, you will learn how to enable and configure ShipRush within Shipbridge to generate USPS labels.

Prerequisites

Before you can connect your ShipRush account with Shipbridge, ensure the following requirements are met:

  • Download and install the latest Shipbridge version from the Sellercloud Support Portal.
  • Have a ShipRush shipping account that supports USPS and obtain the respective API credentials. If you don’t have a ShipRush account, you must first create one:
    • (Recommended) Register through Shipbridge. Follow the instructions outlined in the section below.
    • Register on the ShipRush portal.
To associate your USPS billing with Sellercloud, your ShipRush’s Primary Billing Plan must be set to SellerCloud – Regular. This can be done by your Professional Services representative or by ShipRush Support. Without this configuration, ShipRush will invoice the account on a monthly basis.
ShipRush fees may be fully or partially discounted. USPS Ground Advantage typically includes a $0.20 processing fee.

Integrate ShipRush USPS with Shipbridge

Integrating ShipRush with Shipbridge is a simple and seamless process:

  1. Navigate to Menu > Options > Carriers > USPS.
  2. Enable the Use ShipRush option. All ShipRush-related settings will become available.
  3. Click Register to launch the ShipRush pop‑up window. From there, you can either:
      1. Sign Up to create a new account.
      2. Login with an existing account.

New ShipRush Account

To create a new ShipRush account:

  1. Fill out your contact details, agree to the terms and conditions, and click Sign Up.
  2. Choose a subscription plan and verify your email address to activate your account.
  3. Follow the setup wizard steps and fill in the required information.
  4. Be sure to enable Two-Factor Authentication (2FA). Learn more here.
  5. The User-Token and Shipping-Token should automatically be populated in Shipbridge upon successful registration.
  6. (Optional) Next, to obtain your Shipping-AccountId, select your Default Company and click Assign Shipping User. This is only required for EOD and Buy Postage.
  7. Click Save.

Existing ShipRush Account

If you already have an existing ShipRush account, you must enable Two-Factor Authentication (2FA) and obtain API access tokens. To do that:

  1. Log in to your account and go to Settings > User Settings > Change Password.
  2. Enable Two-Factor Authentication (2FA). ShipRush requires 2FA before API tokens can be generated.
  3. Next, navigate to Settings > User Settings > Developer Tokens and click Apply to Shipping Developer Program to request approval for Developer production access. Once granted, you can retrieve your API tokens.
  4. Copy the User Token and the Shipping Token. You will need them to complete the configuration in Shipbridge.
  5. (Optional) Locate your Shipping Account ID. It typically depends on how you set up ShipRush and which carrier you’re using. In this case, you must locate your USPS Account ID (Show me where!). This is only required for EOD and Buy Postage.
If you’re already logged into ShipRush through your browser, you can locate your USPS Shipping Account ID directly in the URL between the Account- and &carrier path segments.

Once the tokens are in their respective fields in Shipbridge, select your Default Company, and click Save.

ShipRush USPS Features

Once ShipRush is connected, Shipbridge unlocks a full set of USPS shipping capabilities through ShipRush’s API. This includes real‑time rate retrieval, label generation, and additional USPS services such as insurance and delivery confirmation. You can:

  • Configure and use different USPS label types suited for your printers and workflow.
  • Retrieve accurate USPS rates before label creation.
  • Generate USPS labels.
  • Process End‑of‑Day (EOD) manifests. Before using the End‑of‑Day functionality, ensure that your Laser Printer is set up.
  • Add insurance when shipping eligible packages.
  • Enable delivery confirmation services.
  • Purchase postage directly through your ShipRush account.

These integrated capabilities ensure that USPS workflows run efficiently within Shipbridge while relying on ShipRush for all USPS‑compliant processing.

ShipRush NSA

ShipRush’s NSA (Negotiated Service Agreement) refers to a shipper‑specific USPS rate agreement that is loaded into EasyPost and made available alongside standard USPS rates. If an NSA is configured for your ShipRush account, enable the Use NSA setting in Shipbridge to retrieve both standard ShipRush USPS rates and EasyPost USPS (NSA) contract rates. To use EasyPost NSA rates by default, enable the Use NSA by default setting; if disabled, standard ShipRush USPS rates remain the default.

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