{"service":"echo","method":"POST","cost":"$0.001 USDC","what_it_is":"A deterministic x402 integration target on Base mainnet. Send anything; get it back verbatim alongside every field this merchant could decode from your payment.","why_it_exists":"The public x402.org facilitator is testnet-only. Verifying a client against real mainnet USDC means paying a real merchant. This is the cheapest way to do that.","returns":["Your exact body, query, method and path","Decoded payment: scheme, network, x402 version, payer, recipient, value, nonce","Validity window with seconds remaining before expiry","Which header carried the payment (payment-signature for V2, x-payment for V1)","Server receive and respond timestamps, and handler duration"],"honest_limitation":"No transaction hash. Settlement completes after this handler responds. Check the PAYMENT-RESPONSE header on your response for the settlement receipt.","stats":{"echo_calls":0,"distinct_payers":0,"with_payment_header":0,"without_payment_header":0},"try_it":"curl -X POST https://agent-treats-production.up.railway.app/api/echo -H \"Content-Type: application/json\" -d '{\"hello\":\"world\"}'"}