From their site: SwapThing is a community of users who want to swap, buy and sell things in a new way. The purpose of the SwapThing Open API is to share data and increase the opportunities to swap. Our API is built in simple HTTP_XML so everyone can use it. The API provides two basic sets of functionality: Tag Searches - Give us a tag and we'll give you a feed of item data. Choose how you want to use and format it.
Item Details - If you are not using all the data from the feed and have a request for more info on a specific item, you can send us the Item ID from the original feed and we will return the data on that item.
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.