402xAgent: probe of a public URL (blocks private, loopback and link-local addresses on every redirect hop) for an x402 PAYMENT-REQUIRED challenge. Never pays the target. $0.02 USDC on Base after 5 free checks per UTC day.
Api EndpointOtherHealthy · 107 ms0.02 USDC0.02 USDC · eip155:8453 · USDC
https://api.402xagent.com/v1/products/endpoint-spot-check