{"service":"China Shipping & Port Status API","endpoints":{"free":["GET /","GET /api/health","GET /api/preview"],"paid":["GET /api/shipping/all — $0.01"]},"payment":{"protocol":"x402","network":"eip155:8453","payTo":"0x231a9775e036cfb4abb9c8bd93099ad20a3e288c"}}