Ethereum mainnet and Sepolia testnet RPC for AI agents. Every endpoint proxies a single live RPC call — wallet and token balances, blocks, transactions, receipts, event logs, ENS name resolution, contract introspection, and NFT metadata — returning fresh data from OneSource-operated Ethereum nodes. No API keys, no accounts, no subscriptions. Pay per call or use batch/session mode: USDC on Base via x402 (per-call `exact` scheme or batch-settlement `x402-batch` scheme), or pathUSD/USDC.e on Tempo via MPP (per-call or `tempo.session`).
https://api.onesource.io