"Every major card network has signed on to a payment standard built so that software can pay software without a human involved. The Linux Foundation said that the x402 Foundation is now operating under formal governance with 40 members, and that Coinbase's contribution of the protocol is complete. When the web's architects wrote the rules for how browsers and servers talk to each other, they set aside a response code numbered ‘402’ and labeled it "Payment Required," expecting someone would eventually build payments into the web itself."