From their site: The Yahoo! Search Marketing API provides programmatic access to the same functionality exposed visually in the web-based interface. You can create and manage campaigns, pull reports, set bids and more. All of these capabilities are exposed via a collection of SOAP-based Web Services that are easy to use and thoroughly documented.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.