fflpdljiuruqdnewvwkk.supabase.co provides a single-endpoint x402 payment proxy on the Base network that accepts USDC. Its /functions/v1/x402-proxy endpoint lets developers "pay once" (0.10 USDC proxy fee + target API cost) to have the provider execute x402 payments and forward requests to any target API on their behalf, simplifying microtransactions and pay-per-use API integrations.