Can imagine those sites suffered bit-rot once the technique became widespread, they're very useful, and there's not much to them. A webhook is just a callback

Can imagine those sites suffered bit-rot once the technique became widespread, they're very useful, and there's not much to them. A webhook is just a callback that notifies an arbitrary URL when an event occurs. A good explanation is here: http://timothyfitz.wordpress.com/2009/02/09/what-webhooks-are-and-why-you-should-care/ http://timothyfitz.wordpress.com/2009/02/09/what-webhooks-ar...