Returns the native ETH balance of an address on Base mainnet.

Returns the USDC balance of an address on Base mainnet (Circle native bridged USDC).

Returns the latest block number on Base mainnet.

Returns the receipt for a transaction on Base mainnet, including status, gas used, and a summary of emitted logs.

Performs an eth_call against a contract on Base mainnet. Read-only; never broadcasts a transaction.

Returns USDC Transfer events involving the given address over the last N blocks on Base mainnet. Direction filter: in, out, or both.

Given a tx hash, expected recipient, and expected USDC amount, returns a structured verdict on whether the on-chain USDC Transfer event actually matches the claimed settlement. Use to independently verify any x402 payment receipt.

Fetches https://{domain}/.well-known/x402.json (or x402) and returns the structured manifest. Used to discover what an x402-paid publisher accepts (scheme, network, payTo, prices, paid endpoints).

Returns USDC transfers TO the given address over the last N blocks on Base mainnet. A convenience wrapper for x402 merchants verifying incoming agent payments.

Calls TensorFeed's canonical AFTA certification endpoint for a domain. Returns a scored checklist of which Agent Fair-Trade Agreement tenets the domain's public surfaces satisfy. Read-only.

On-chain lookup: was this transaction hash a USDC payment to TensorFeed's canonical payment wallet (0x549c82e6bFC54bdaE9A2073744CBC2AF5D1FC6D1) on Base mainnet? Returns structured details if yes. For credit attribution and endpoint mapping, the paying agent should call https://tensorfeed.ai/api/payment/history with its bearer token.