httppayai

Crypto Microdata for Agents

Pay-per-call Ethereum mainnet (chain 1) JSON-RPC, no API key, no account, paid in Base USDC: GET ?method=eth_call&params=[...] or POST a standard JSON-RPC body; POST a batch of up to 10 calls for ONE $0.002 payment (vs ~$0.01 per call at other x402 mainnet RPC APIs). Methods: eth_blockNumber, eth_chainId, eth_call, eth_estimateGas, eth_getBalance, eth_getTransactionCount, eth_getCode, eth_getStorageAt, eth_getTransactionByHash, eth_getTransactionReceipt, eth_getBlockByNumber, eth_getBlockByHash, eth_getLogs (<=2000 blocks), eth_gasPrice, eth_maxPriorityFeePerGas, eth_feeHistory, eth_sendRawTransaction, net_version. Failover across 7 public Ethereum RPCs; outage = 502 = not charged. Plain JSON-RPC 2.0 so viem/ethers work. When to call: your agent needs an L1 read (ENS, mainnet token balance, contract state, receipt) or to broadcast a signed mainnet tx.