{"product":"pool","tiers":[{"tier":"mbl","pricePerGB":4,"currency":"USDC","minPurchaseGB":0.1,"quality":"production tier - ProxySmart modems, 6 countries, 10-15 Mbps, sub-1s TTFB, 100% success","allowedIpTypes":["mobile"]}],"defaultTier":"mbl","durationFree":true,"maxDurationSeconds":7776000,"stockUrl":"https://api.proxies.sx/v1/gateway/pool/stock","usernameDsl":"psx_<house>-{pool}-{country}[-sid-{8-64 a-z0-9_}][-rot-{sticky|hard|auto5|auto10|auto20|auto60|ondemand}][-carrier-..][-city-..]","networks":[{"network":"base","chainId":"eip155:8453","enabled":true,"usdcAddress":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","recipientAddress":"0xF8cD900794245fc36CBE65be9afc23CDF5103042"},{"network":"solana","chainId":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","enabled":true,"usdcAddress":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","recipientAddress":"6eUdVwsPArTxwVqEARYGCh4S2qwW2zCs7jSEDRpxydnv"}],"purchase":"GET|POST /v1/x402/pool?tier=mbl&country=us&traffic=1 (pay USDC, retry with Payment-Signature header)","notes":["mbl = production modems (default, trust-first). peer tiers ship after gateway ipType enforcement (W2).","one credential covers EVERY country in your tier - retarget via the username DSL, no repurchase per country","sticky pins the MODEM not the IP; carrier NAT may re-issue exit IPs"]}