The service delivers distorted images of text -- a captcha -- to be incorporated in form controls or other website resources. Users must correctly interpret the captcha to successfully submit the form or use otherwise interact with the site. Bots and automated scripts, typically intended to post spam messages, fail to respond correctly, which prevents them from continuing.
API methods support retrieval and display of a captcha image, along with verification of the user response as correct or incorrect.
The following is a list of sample source code snippets that matched your search term. Source code snippets are chunks of source code that were found out on the Web that you can cut and paste into your own source code. Whereas most of the sample source code we've curated for our directory is for consuming APIs, we occasionally find something interesting on the API provider side of things. If you know of some sample source code 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.