The service provides and alternative to CAPTCHA for validating form submissions and preventing abusive submissions by scripts or bots. Instead of entering distorted characters, the service presents a series of images and allows a human user to use a mouse to draw a line connecting related images or to circle an unrelated item. An "adaptive AI" modifies the service's behavior over time based on aggregated user actions.
The following is a list of how-to and tutorial content that matched your search term. ProgrammableWeb's how-to content comes from two sources; full-blown tutorials that we publish ourselves and other highly relevant tutorials that we find elsewhere on the Web. This list represents on combination of both tutorial types and if you go to ProgrammableWeb's API University, you'll not only be able to find more, they are organized based on your role (API providers or developers who consumes APIs). If you know of a tutorial that would be of interest to the ProgrammableWeb community, we'd like to know about it. Be sure to check our guidelines for making contributions to ProgrammableWeb.