{"service":"bal-check","description":"Base chain ETH + USDC balance for an address. Pay $0.003 USDC via x402.","endpoints":{"GET /v1/balance?address=0x...":"$0.003","GET /openapi.json":"free","GET /.well-known/x402.json":"free"},"network":"eip155:8453","payTo":"0x7B97303d62517eA9E26D1E1b199Eac42a487F430","chain":"base"}