The only stateful part of an x402 payment gate is the replay ledger

An x402 paywall is three steps: the server answers an unpaid request with 402 and the terms it accepts, the client repeats the same request carrying an X-PAYMENT header, and the server verifies, settles, and only then serves. Two of those steps can be stateless. The third cannot. Unless the server remembers which payments it has already settled, a... Weiterlesen