Countersign testnet shelf. 6 x402 listings on Base Sepolia (eip155:84532). Test money only.
GET https://shelf-production-43b5.up.railway.app/v1/sepolia/block-height/q1  $0.001
GET https://shelf-production-43b5.up.railway.app/v1/sepolia/block-height/q5  $0.005
GET https://shelf-production-43b5.up.railway.app/v1/sepolia/block-height/m1  $0.001
GET https://shelf-production-43b5.up.railway.app/v1/sepolia/block-height/m5  $0.005
GET https://shelf-production-43b5.up.railway.app/v1/sepolia/block-height/t1  $0.001
GET https://shelf-production-43b5.up.railway.app/v1/sepolia/block-height/t5  $0.005