Token transfers, Sei. List a wallet's recent transfers of one ERC-20 token (default USDC) on Sei, in and out, over the last N blocks (1-2,000, default 1,000): direction, counterparty, amount and transaction, newest first, up to 50. Use to confirm a payment arrived or see what was sent; for the current balance use sei_token_balance. Malformed addresses are rejected with 400, uncharged.

Sei transaction. Look up a Sei transaction by hash: sender, recipient, value in SEI, nonce, gas limit, the 4-byte function selector and its block. Use to see what was sent or whether it exists; for success or failure and fees paid use sei_receipt, for emitted events sei_logs. Input is a 0x-prefixed 64-hex hash; an unknown hash returns 404, uncharged.

Sonic gas price. Current gas price on Sonic (eth_gasPrice): gas price, base fee and suggested priority fee in gwei, plus what a plain S transfer (21,000 gas) costs right now. Takes no input. Use before sending a transaction or to decide whether to wait; for the fee a past transaction actually paid use sonic_receipt.

Sei transaction receipt. Transaction receipt on Sei (eth_getTransactionReceipt): success or reverted, gas used, effective gas price, fee paid in SEI, number of event logs and any contract created. Use to confirm a payment or call went through; for sender, value and calldata use sei_tx. Input is a 0x-prefixed 64-hex hash; a pending or unknown hash returns 404, uncharged.

Gas history, Sonic gas price. Gas price history on Sonic (eth_feeHistory): base fee in gwei for each of the last N blocks (5-100, default 20), how full each block was, and the 10th, 50th and 90th percentile priority fees, with the low, average and high base fee over the window. Use to judge whether fees are rising, pick a priority fee or time a transaction; for the current price alone use sonic_gas.

Sei ERC-20 token info. Look up the name, symbol, decimals and total supply of an ERC-20 token contract on Sei, live from the contract. Use to identify an unknown token address or to format raw amounts; for a holder's balance use sei_token_balance. Input is a ticker (USDC, WETH…) or the token's 0x contract address; an address that is not an ERC-20 contract returns 422, uncharged.

Estimate gas, Sonic. Estimate the gas a transaction would use on Sonic (eth_estimateGas) and what it would cost at the current gas price, in gas units, gwei and S. Give to, plus value in S and calldata for a contract call, and the sender when the call depends on it. Use before sending a transaction or to price a batch; for the gas price alone use sonic_gas. A transaction that would revert is 422 with the reason, uncharged.

Sonic ERC-20 token info. Look up the name, symbol, decimals and total supply of an ERC-20 token contract on Sonic, live from the contract. Use to identify an unknown token address or to format raw amounts; for a holder's balance use sonic_token_balance. Input is a ticker (USDC, WETH…) or the token's 0x contract address; an address that is not an ERC-20 contract returns 422, uncharged.

NFT owner, Unichain. Owner of an NFT on Unichain: the wallet that holds one ERC-721 token id right now (ownerOf), plus the collection's name and symbol. Use to verify who holds an NFT before a trade, a mint gate or an airdrop; for how many a wallet holds use unichain_nft_balance, for the token's metadata unichain_nft_metadata. A missing contract is 404, a token that does not exist 422, both uncharged.

NFT metadata, Unichain. NFT metadata on Unichain: the token URI of one ERC-721 token id (tokenURI) and the JSON it points to (name, description, image, attributes), read from data: URIs, https or ipfs:// (through ipfs.io). Strings over 1,000 characters, such as on-chain SVG images, are shortened. Use to show or check what an NFT is; for its owner use unichain_nft_owner. A token that does not exist is 422, uncharged; unreachable metadata is reported in metadataError.

NFT balance, Unichain. How many NFTs of one ERC-721 collection a wallet holds on Unichain (balanceOf), with the collection's name and symbol. Use to check a holder before a token-gated action or to see whether a wallet still holds a collection; for who holds one token id use unichain_nft_owner. Both inputs are 0x addresses; a missing contract is 404, a contract that is not ERC-721 422, both uncharged.

Unichain recent event logs. Recent contract event logs on Unichain (eth_getLogs): the events a contract emitted over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event signature hash). Returns up to 100 logs with block, transaction hash and topics. Use to watch transfers or contract events; for one transaction's outcome use unichain_receipt.

Unichain contract check. Check whether a 0x address on Unichain is a smart contract or a plain wallet: bytecode size, and whether it is an EIP-1167 minimal proxy and which implementation it points to. Use before sending funds or approving a spender; for a fuller risk verdict use check_counterparty. A malformed address is rejected with 400, uncharged.

Gas history, Unichain gas price. Gas price history on Unichain (eth_feeHistory): base fee in gwei for each of the last N blocks (5-100, default 20), how full each block was, and the 10th, 50th and 90th percentile priority fees, with the low, average and high base fee over the window. Use to judge whether fees are rising, pick a priority fee or time a transaction; for the current price alone use unichain_gas.

Unichain gas price. Current gas price on Unichain (eth_gasPrice): gas price, base fee and suggested priority fee in gwei, plus what a plain ETH transfer (21,000 gas) costs right now. Takes no input. Use before sending a transaction or to decide whether to wait; for the fee a past transaction actually paid use unichain_receipt.

Estimate gas, Unichain. Estimate the gas a transaction would use on Unichain (eth_estimateGas) and what it would cost at the current gas price, in gas units, gwei and ETH. Give to, plus value in ETH and calldata for a contract call, and the sender when the call depends on it. Use before sending a transaction or to price a batch; for the gas price alone use unichain_gas. A transaction that would revert is 422 with the reason, uncharged.

Eth call, Unichain contract call. Read-only contract call on Unichain (eth_call): send ABI-encoded calldata to a contract at the latest block and get the raw return data, without a transaction or gas. Use to read any view function that has no dedicated tool (the example reads USDC totalSupply, selector 0x18160ddd); decode the result with the function's ABI. Calldata up to 8 KB; a call that reverts is 422 with the reason, uncharged.

Unichain native balance. Native ETH balance (eth_getBalance) of any 0x wallet address on Unichain at the latest block, in wei and in ETH. Use to check whether a wallet can pay gas or a transfer; for ERC-20 tokens use unichain_token_balance, for all holdings at once use wallet_portfolio. A malformed address is rejected with 400, uncharged.

Token allowance, Unichain ERC-20. ERC-20 token allowance on Unichain: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approval before a swap or to audit risky open approvals; for the owner's balance use unichain_token_balance. Token is a ticker (USDC, USDT, WETH…) or a 0x contract; a missing contract is 404 and a non-ERC-20 422, both uncharged.

Sonic transaction. Look up a Sonic transaction by hash: sender, recipient, value in S, nonce, gas limit, the 4-byte function selector and its block. Use to see what was sent or whether it exists; for success or failure and fees paid use sonic_receipt, for emitted events sonic_logs. Input is a 0x-prefixed 64-hex hash; an unknown hash returns 404, uncharged.