reCAPTCHA

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wikipedia:ReCAPTCHA (2007)

• ReCAPTCHA Enterprise

• https://www.google.com/recaptcha/api.js

See also

• Web, Search engine, How to add Wikipedia as a Chrome search engine, URL redirection, List of HTTP status codes, HAR (file format), HTTP response status code, URL, URI, Web3, reCAPTCHA