{"service":"402rpc.com","protocol":"x402","x402Version":2,"network":"base","pay_to":"0x295AA6c5a3460A0f8755823C8eE7bBC7CAf79fb1","facilitator":"coinbase-cdp","how_to_pay":"POST to /rpc. The 402 response carries the payment terms in the PAYMENT-REQUIRED header (USDC on Base, Polygon or Arbitrum). Sign, retry, done — no signup, no keys. The facilitator covers gas, so you need USDC but no ETH.","paid":{"rpc":{"path":"/rpc","method":"POST","description":"Ethereum mainnet JSON-RPC 2.0","pricing":{"chain_metadata":"$0.001","lookup":"$0.002","raw_transaction":"$0.002","execution":"$0.005","logs":"$0.005 - $0.03 by block range","max_per_request":"$0.100"}}},"free":{"health":"/health","catalog_json":"/ (Accept: application/json)","llms_txt":"/llms.txt","icon":"/icon.png"},"coverage":{"chain":"ethereum-mainnet","chain_id":1,"history_from_block":15537394,"archive":false,"note":"Current state only. Historical state calls are refused, not charged.","max_log_range_blocks":10000,"log_filter_required_beyond_blocks":25,"max_batch":20,"namespaces":["eth_","net_","web3_"]},"billing_note":"Failed requests are never charged. Anything refused before the paywall, refused by the node itself, or a node failure returns 4xx or 5xx and settles nothing."}