Don Park

HTTP Header

X-micropayment: [protocol]

(from https://gist.github.com/sipa/1237788)

• “script” : base64-encoded txout script that must be present in the created transaction.
• “amount” : bitcoin amount to be sent (optional, in which case the client asks the user).

Fastest: client signs TX, hands to server (no bitcoin network involved). Server can selectively run various checks, including submitting to the bitcoin network and waiting, or trusting valid signature and current known balance.