x402 payment self-test: verify your agent's payment stack end-to-end against a production seller for $0.001. Returns payer address, network and server time; the settlement tx lands in the X-PAYMENT-RESPONSE header. Smoke-test a new wallet, client library, or an agent's first-ever paid call before pointing it at anything expensive. Failed calls are never billed. This host also sells standing infra: on-chain watches, dead-man switches, cron schedules, url-change monitors, coordination.

Payment Options