USPS Modern is a direct integration between ShipHero and USPS's rate shopping and label generation tools. It gives you access to all commercial domestic and international USPS services, and each one has specific requirements.
Before You Begin
- Account configuration: Using USPS Modern with ShipHero requires a multi-step setup with USPS (Business Account, USPS Ship) to get and connect your CRID, MID, and EPS numbers. Complete all steps in Connecting USPS Modern to ShipHero.
- International and military shipping: Your USPS Modern account must be explicitly approved by USPS to generate labels for international and military addresses (APO/FPO/DPO). Make sure your USPS Business Account is configured and approved for all international and military destinations.
- NSA rates (negotiated rates): If you have negotiated rates (NSA) with USPS, they require specific settings in ShipHero. Contact ShipHero Support before connecting so your NSA settings are correctly activated and applied to your account.
Table of Contents
- USPS Modern Service Levels Defined
- Shipping Letters and Flats with USPS Modern
- Understanding USPS Modern Manifests (SCAN Forms)
- Troubleshooting USPS Modern Errors
USPS Modern Service Levels Defined
The USPS Modern connection provides access to all commercial domestic and international USPS services.
| Service Level | Description | Key Feature |
|---|---|---|
| USPS Ground Advantage | Affordable, reliable service for packages up to 70 lbs. (Replaced First-Class Package Services and Parcel Select Ground). | Standard ground shipping for packages. |
| Priority Mail | Standard domestic service for speed and value, typically delivered in 1-3 business days. | Includes free Flat Rate packaging options and tracking. |
| Priority Mail Express | The fastest domestic service, often offering 1-2 day delivery with a money-back guarantee to most locations. | Premium, urgent shipping for time-sensitive deliveries. |
| First-Class Mail | Used for mailing letters and flats (large envelopes) up to specific weight limits. For the size limits and requirements, see How to Ship Letters and Flats with USPS Modern. | Most cost-effective option for lightweight correspondence or documents. |
| International Services | Various options for global shipping (e.g., Priority Mail International). | Global reach (subject to initial USPS approval). |
Shipping Letters and Flats with USPS Modern
USPS Modern has strict dimensional rules for its Letters and Flats mail classes, and Letters and Flats has limits when you rate shop. For the size limits, best practices, and limitations, see How to Ship Letters and Flats with USPS Modern.
Understanding USPS Modern Manifests (SCAN Forms)
ShipHero supports End of Day Manifests, which USPS calls SCAN Forms, for USPS Modern. For how manifests work, the shipDate rule, cut-off times, and worked examples, see Understanding USPS Modern Manifests.
Troubleshooting USPS Modern Errors
For USPS Modern label errors and known limitations, see Troubleshooting: USPS Modern Errors and Limitations.