Assembly

402 Payment Required

HTTP Status Code "402 Payment Required" --> Reserved for future use

The original intention was that this status code might be used as part of some form of digital cash or micropayment scheme .. so if you have interest in eCash, Bitcoin or any other form of digital money protocols for the future - join in, discuss, experiment.

https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/402