In the United States, there are numerous shipping agents to choose from. Some of the prominent ones include:

　　1. FedEx: Renowned for its fast and reliable delivery services, both domestically and internationally.

　　2. UPS: Offers a wide range of shipping options and has an extensive network.

　　3. DHL: Specializes in global express shipping and logistics solutions.

　　These shipping agents typically provide services such as:

　　1. Package and freight transportation by various modes (air, ground, sea).

　　2. Customs brokerage and compliance assistance.

　　3. Tracking and visibility tools to monitor your shipments.

　　4. Warehousing and distribution services.

　　When selecting a shipping agent in the USA, consider the following:

　　1. The specific shipping needs of your goods (size, weight, fragility).

　　2. Delivery speed and reliability requirements.

　　3. Cost and any additional fees or surcharges.

　　4. The agent's coverage and reach within the USA and internationally.

　　You can find suitable shipping agents in the USA through:

　　1. Online research and reviews on shipping comparison websites.

　　2. Referrals from business partners or colleagues who have used similar services.

　　3. Contacting local chambers of commerce or industry associations for recommendations.