Validate your service

Preflight your endpoint before you list it. We send one unpaid request and check it speaks x402 v2 — a 402 whose PAYMENT-REQUIRED header decodes to a valid offer with a recognized Kaspa scheme and a well-formed payTo — so agents don’t hit a dead listing. Nothing is charged or stored.

Built on the Kaspa x402 standard. Your pay-gate should return a 402 with a PAYMENT-REQUIRED header to any request that has no PAYMENT-SIGNATURE — the @kaspa-x402/server SDK does this for you.