{"name":"Multi-chain Gas Oracle (x402)","description":"Multi-chain EIP-1559 gas oracle for AI agents (ethereum, base, arbitrum, optimism, polygon, bsc): gas_price, base_fee, priority fee p10/p50/p90 and suggested maxFeePerGas. Public RPCs only. Errors never charged.","pricing":{"per_successful_call":"$0.003 USDC","network":"eip155:8453","asset_usdc":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","payTo":"0xFf4b3F19CeAe3a4d29bDe4Ca9053783e038258D4","protocol":"x402 v2 (scheme exact)","facilitator":"https://facilitator.xpay.sh"},"chains":[{"chain_id":1,"name":"ethereum","native":"ETH"},{"chain_id":10,"name":"optimism","native":"ETH"},{"chain_id":56,"name":"bsc","native":"BNB"},{"chain_id":137,"name":"polygon","native":"MATIC"},{"chain_id":8453,"name":"base","native":"ETH"},{"chain_id":42161,"name":"arbitrum","native":"ETH"}],"endpoints":["/v1/{chain}/gas"],"mcp":"https://gas-oracle.frcompanycheck.workers.dev/mcp","not_charged":"Invalid/unknown chain (400/404), capacity (503), upstream RPC error (502) are never settled.","free":["GET /","GET /health","GET /openapi.json","GET /llms.txt","GET /.well-known/x402","GET /.well-known/mcp.json","GET /.well-known/ard.json","GET /v1/sample","GET /v1/chains","POST /mcp (initialize/tools/list)"],"example":"https://gas-oracle.frcompanycheck.workers.dev/v1/8453/gas","limits":"60 requests/minute per IP","keywords":["gas oracle","gas price","EIP-1559","base fee","priority fee","ethereum gas","base gas","arbitrum gas","polygon gas","bsc gas","x402"]}