// Check cryptocurrency wallet balances, token holdings, transaction history, token approvals, ENS name resolution, and on-chain activity. Use when asked about wallet balance, what tokens an address holds, transaction history, pending transactions, token allowances, ENS lookup, or address portfolio.
Get centralized exchange market data, order books, trading pairs, ticker prices, and 24h volume across Binance, Coinbase, Kraken, Bybit, Gate.io, and Bitget. Use when asked about CEX prices, exchange order book, trading pairs, CEX volume, Binance price, Kraken ticker, exchange comparison, or funding rates on centralized exchanges.
Get cryptocurrency prices, market cap, trading volume, trending tokens, market sentiment, Fear & Greed Index, total value locked (TVL), and DeFi protocol rankings. Use when asked about token price, crypto market overview, what's trending, market sentiment, TVL by chain or protocol, top gainers/losers, or price history.
Research cryptocurrency tokens, verify smart contracts, check perpetual futures data, governance proposals, and on-chain analytics. Use when asked about token research, contract verification, is this token safe, rug pull check, Hyperliquid perps, funding rates, governance vote, Dune analytics, token due diligence, or security audit status.
Track smart money trading signals on-chain. Monitor professional investor buy/sell activity, whale movements, alpha scanning, and signal performance. Use when asked about smart money, whale tracking, alpha signals, trading signals, or professional investor activity.
Check DeFi lending and borrowing rates, supply/borrow APY, positions, health factors, and protocol comparisons. Use when asked about lending rates, borrowing costs, Aave rates, Compound APY, Morpho markets, lending protocol comparison, health factor, or liquidation risk.
Check liquid staking APR, exchange rates, withdrawal queues, and staking rewards for ETH and other tokens. Use when asked about staking ETH, Lido stETH, Rocket Pool rETH, staking APR, liquid staking rates, staking rewards, unstaking queue, or staking comparison.
| name | crypto-wallet |
| description | Check cryptocurrency wallet balances, token holdings, transaction history, token approvals, ENS name resolution, and on-chain activity. Use when asked about wallet balance, what tokens an address holds, transaction history, pending transactions, token allowances, ENS lookup, or address portfolio. |
Query on-chain wallet data: balances, tokens, transactions, approvals, and ENS resolution.
| Function | Selector | Params |
|---|---|---|
balanceOf(address) | 0x70a08231 | address (32 bytes, left-padded) |
allowance(address,address) | 0xdd62ed3e | owner + spender (each 32 bytes) |
decimals() | 0x313ce567 | none |
symbol() | 0x95d89b41 | none |
name() | 0x06fdde03 | none |
totalSupply() | 0x18160ddd | none |
Native ETH balance (eth_getBalance):
exec command="curl -s -X POST https://eth.llamarpc.com -H 'Content-Type: application/json' -d '{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBalance\",\"params\":[\"0xADDRESS\",\"latest\"],\"id\":1}'"
ERC-20 token balance (eth_call with balanceOf):
exec command="curl -s -X POST https://eth.llamarpc.com -H 'Content-Type: application/json' -d '{\"jsonrpc\":\"2.0\",\"method\":\"eth_call\",\"params\":[{\"to\":\"0xTOKEN_CONTRACT\",\"data\":\"0x70a08231000000000000000000000000WALLET_NO_0x\"},\"latest\"],\"id\":1}'"
Result is hex. Convert:
parseInt(result, 16) / 10^decimals
| Chain | RPC URL |
|---|---|
| Ethereum | https://eth.llamarpc.com |
| Arbitrum | https://arb1.arbitrum.io/rpc |
| Optimism | https://mainnet.optimism.io |
| Base | https://mainnet.base.org |
| Polygon | https://polygon-rpc.com |
| BSC | https://bsc-dataseed.binance.org |
| Avalanche | https://api.avax.network/ext/bc/C/rpc |
Base URLs:
https://api.etherscan.io/apihttps://api.arbiscan.io/apihttps://api.basescan.org/apihttps://api-optimistic.etherscan.io/apihttps://api.polygonscan.com/apihttps://api.bscscan.com/apiToken balances for address (requires free API key):
web_fetch url="https://api.etherscan.io/api?module=account&action=tokentx&address=0xADDRESS&page=1&offset=50&sort=desc&apikey=YOUR_KEY"
Normal transactions:
web_fetch url="https://api.etherscan.io/api?module=account&action=txlist&address=0xADDRESS&startblock=0&endblock=99999999&page=1&offset=20&sort=desc&apikey=YOUR_KEY"
ETH balance (no key needed, rate limited):
web_fetch url="https://api.etherscan.io/api?module=account&action=balance&address=0xADDRESS&tag=latest"
Forward (name to address) via RPC:
exec command="curl -s -X POST https://eth.llamarpc.com -H 'Content-Type: application/json' -d '{\"jsonrpc\":\"2.0\",\"method\":\"eth_call\",\"params\":[{\"to\":\"0x4976fb03C32e5B8cfe2b6cCB31c09Ba78EBaBa41\",\"data\":\"0x3b3b57de{NAMEHASH}\"},\"latest\"],\"id\":1}'"
Simpler: use ENS public API:
web_fetch url="https://ensdata.net/ADDRESS_OR_NAME"
Check allowance (how much a spender can use):
exec command="curl -s -X POST https://eth.llamarpc.com -H 'Content-Type: application/json' -d '{\"jsonrpc\":\"2.0\",\"method\":\"eth_call\",\"params\":[{\"to\":\"0xTOKEN\",\"data\":\"0xdd62ed3e000000000000000000000000OWNER_NO_0x000000000000000000000000SPENDER_NO_0x\"},\"latest\"],\"id\":1}'"
Unlimited approval =
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
npx @mcpdotdirect/evm-mcp-server — read balances, tokens, NFTs across 60+ EVM chainsgithub.com/base/base-mcp — Coinbase-official Base chain tools0x prefix from address when embedding in calldata, then left-pad with zerosparseInt(hex, 16)10^decimals (USDC=6, most tokens=18)