The OED bills itself as the definitive record of the English language. The OED SRU service (search/retrieve via URL) provides a means to automate basic queries, using a standard syntax to represent queries, and a standard protocol for returning results. The API uses RESTful calls and responses are formatted in XML.
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.