The Ericsson Labs Captcha API is a RESTful API that lets developers have a security tool for their aplications and websites to verify that a user is human and not a bot. The Captcha API also lets publishers and advertisers advertise their products/services in a different manner than a traditional banner ad, since the Captcha words and images are Ad words/images.
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.