{"name":"barker-mcp","role":"A2MCP Service Provider (Seller)","facilitators":["OKX (X Layer / USDT0)","Coinbase CDP (Base / USDC)","Circle Gateway (Base+ETH+Polygon+Arbitrum / USDC, Nanopayments)"],"networks":["eip155:196","eip155:8453","eip155:1","eip155:137","eip155:42161"],"payTo":"0x83f15f5bea445109e255ab82622fbdfecd1e4c9f","tools":[{"name":"barker_defi_vaults","price":"$0.001"},{"name":"barker_market_overview","price":"$0.001"},{"name":"barker_market_trend","price":"$0.001"},{"name":"barker_yield_advisor","price":"$0.03"},{"name":"barker_pool_detail","price":"$0.005"},{"name":"barker_pool_history","price":"$0.005"},{"name":"barker_pool_search","price":"$0.001"},{"name":"barker_crosschain_routes","price":"$0.01"},{"name":"barker_executable_pools","price":"$0.01"},{"name":"barker_execution_quote","price":"$0.05"},{"name":"barker_vault_position","price":"$0.001"}],"billing":{"model":"Pay per call. Price is per endpoint (see tools above); arguments do not change it.","charged_when":"Only on a 2xx response.","not_charged_when":"Any 4xx/5xx — invalid or missing arguments, unknown pool, upstream failure, or a payment/request argument mismatch. Argument validation happens after payment is presented (the paywall runs first), but a failed call is never settled.","argument_binding":"A 402 challenge is bound to one exact request URL (path + query string). Pay the challenge for the exact call you intend to make; reusing a payment across different arguments is rejected and not charged."},"mcp":{"endpoint":"/mcp","transport":"streamable-http","free_methods":["initialize","tools/list"]},"flow":"Typical flow: barker_yield_advisor (ranked picks) → barker_pool_detail (inspect) → barker_executable_pools + barker_execution_quote (ready-to-sign tx). For richer data + one-click execution, use Barker's agent at https://app.barker.money/agent","mpp":{"enabled":false,"network":"eip155:56","currency":"0x8d0D000Ee44948FC98c9B98A4FA4921476f08B0d","payTo":"0x83f15f5bea445109e255ab82622fbdfecd1e4c9f","relayer":null,"realm":"mcp.barker.money"}}