To follow the
example in this chapter, you should create keys for the production site.
Figure 6-1. eBay developer authorization key page
CHAPTER 6 n TRACKING AUCTIONS WITH EBAY 112
Next, you??™ll be asked whether you want to create an authorization token, and you
should select to do so. Authorization tokens are used to access the REST API, whereas
authorization keys can be used to access eBay??™s full developer API. The authorization
token is only slightly different from a set of authorization keys (and, truth be told, it??™s not
really clear why eBay has two separate authorization systems). You??™ll need an eBay.com
account in order to create an authorization token. Remember your eBay.com username,
as you??™ll need to use it in conjunction with your authorization token.
Obtaining Competitive Intelligence via eBay
Web Services
Suppose you own a business selling, say, musical instruments to the public, and you
want to use eBay??™s web services to make sure your equipment is competitively priced.
You would like to sell the instruments rapidly, so you don??™t want to price them too high,
but you would also like to have as high a profit margin as possible, so you don??™t want to
price them too low.
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