From the USA Trade Web Site:
On October 15, 2015, access to USA Trade Online will be FREE to all customers. To that effect, starting September 1, 2015, we’ll begin our transition process for new customers and also those renewing their exisiting account.
If you are signing up [free] as a new customer or are renewing your account, please use promo code F0901 to create or renew an account.
Details about registration are available here.
About the Database
Provided by the U.S. Census Bureau, USA Trade Online is a dynamic data tool that gives users access to current and cumulative U.S. export and import data. With multiple data sets and capabilities, USA Trade Online can assist different types of customers from a wide range of industries and fields. Manufacturers and other businesses wishing to expand their business globally can utilize USA Trade Online to identify new markets, evaluate existing markets, and perform other market research tasks. The data available through this tool can also support economists in interpreting economic news and performing academic research, as well assist governments and federal agencies in analyzing domestic and international trade policies.