{"what":"A live x402 test target. POST here with an X-PAYMENT header to exercise a real mainnet settlement.","price_usd":0.005,"network":"base","asset":"USDC","pay_to":"0x94FBb0772d93c9CdEDDdfb93969042Ac8ebB3070","dry_run":"GET https://api.zenvault.eu/v1/x402/echo returns this document free; POST without payment returns the 402 challenge free, so you can test challenge parsing at no cost.","on_success":"echoes your request back with the payer address, transaction hash, network and a signed receipt","reference_client":"https://zenvault.eu/llms.txt (see also scripts/x402-client.mjs in the docs)"}