Boar blockchain MCP (basic)
Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo.
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What it can do
- Eth Get Balance: Get native token balance for an address on Ethereum mainnet. Returns balance in wei (hex and decimal) and in ether.
- Eth Get Block: Get block data by number or tag on Ethereum mainnet. Use hex block number (e.g. "0x1") or "latest". Returns full block object with transaction hashes.
- Eth Get Transaction: Get transaction details by hash on Ethereum mainnet. Returns full transaction object including from, to, value, input data, and status.
What data it sees
Do you need an account
No: the server works without sign-in
Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required - just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.
Server tool list (37)
Raw names from tools/list. Only developers need these.
| eth_get_balance | Get native token balance for an address on Ethereum mainnet. Returns balance in wei (hex and decimal) and in ether. |
| eth_get_block | Get block data by number or tag on Ethereum mainnet. Use hex block number (e.g. "0x1") or "latest". Returns full block object with transaction hashes. |
| eth_get_transaction | Get transaction details by hash on Ethereum mainnet. Returns full transaction object including from, to, value, input data, and status. |
| eth_get_logs | Get event logs matching a filter on Ethereum mainnet. Requires at least fromBlock and toBlock. Optionally filter by contract address and topics. |
| eth_gas_price | Get current gas price on Ethereum mainnet in wei (hex string). Use to estimate transaction costs. |
| eth_estimate_gas | Estimate gas required for a transaction on Ethereum mainnet. Returns gas estimate as hex string. |
| eth_get_transaction_receipt | Get transaction receipt by hash on Ethereum mainnet. Returns status (0x1=success, 0x0=fail), gasUsed, contractAddress (for contract deployments), and event logs. |
| eth_get_code | Get bytecode at an address on Ethereum mainnet. Returns "0x" for EOAs (wallets), non-empty hex for contracts. Use to determine if an address is a contract or EOA, and to retrieve deployed bytecode. |
| eth_get_token_balance | Get ERC-20 token balance for a wallet address on Ethereum mainnet. Returns raw balance, formatted balance with decimals, and token symbol. Calls balanceOf, decimals, and symbol on the token contract. |
| eth_get_token_info | Get ERC-20 token metadata for a token address on Ethereum mainnet. Returns name, symbol, decimals, and total supply (raw and formatted). Degrades gracefully — any individual call failure returns null for that field. |
| mezo_get_balance | Get native token balance for an address on Mezo. Returns balance in wei (hex and decimal) and in ether. |
| mezo_get_block | Get block data by number or tag on Mezo. Use hex block number (e.g. "0x1") or "latest". Returns full block object with transaction hashes. |
| mezo_get_transaction | Get transaction details by hash on Mezo. Returns full transaction object including from, to, value, input data, and status. |
| mezo_get_logs | Get event logs matching a filter on Mezo. Requires at least fromBlock and toBlock. Optionally filter by contract address and topics. |
| mezo_gas_price | Get current gas price on Mezo in wei (hex string). Use to estimate transaction costs. |
| mezo_get_transaction_receipt | Get transaction receipt by hash on Mezo. Returns status (0x1=success, 0x0=fail), gasUsed, contractAddress (for contract deployments), and event logs. |
| mezo_get_code | Get bytecode at an address on Mezo. Returns "0x" for EOAs (wallets), non-empty hex for contracts. Use to determine if an address is a contract or EOA, and to retrieve deployed bytecode. |
| mezo_get_token_balance | Get ERC-20 token balance for a wallet address on Mezo. Returns raw balance, formatted balance with decimals, and token symbol. Calls balanceOf, decimals, and symbol on the token contract. |
| mezo_get_token_info | Get ERC-20 token metadata for a token address on Mezo. Returns name, symbol, decimals, and total supply (raw and formatted). Degrades gracefully — any individual call failure returns null for that field. |
| btc_get_balance | Get confirmed and unconfirmed balance for a Bitcoin address on Bitcoin mainnet. Returns balance in satoshis. |
| btc_get_history | Get transaction history for a Bitcoin address on Bitcoin mainnet. Returns list of transactions with heights and tx hashes. |
| btc_get_utxos | Get unspent transaction outputs (UTXOs) for a Bitcoin address on Bitcoin mainnet. Returns list of unspent outputs with tx hash, position, height, and value in satoshis. |
| btc_get_transaction | Get full transaction details by txid on Bitcoin mainnet. Returns verbose transaction data including inputs, outputs, confirmations, and block hash. |
| btc_get_block | Get block header data by height on Bitcoin mainnet. Returns parsed header with hash, version, previous block hash, merkle root, timestamp, bits, and nonce. |
| btc_get_fee_estimate | Get fee rate estimate on Bitcoin mainnet for a target number of blocks. Returns estimated fee in BTC/kB and sat/byte. Use target=1 for next-block, target=6 for ~1 hour. Returns -1 if no estimate available. |
| btc_get_mempool_info | Get mempool fee histogram on Bitcoin mainnet. Returns array of [fee_rate, cumulative_vsize] pairs showing the distribution of transactions in the mempool by fee rate (sat/vB). |
| btc_testnet_get_balance | Get confirmed and unconfirmed balance for a Bitcoin address on Bitcoin testnet3. Returns balance in satoshis. |
| btc_testnet_get_history | Get transaction history for a Bitcoin address on Bitcoin testnet3. Returns list of transactions with heights and tx hashes. |
| btc_testnet_get_utxos | Get unspent transaction outputs (UTXOs) for a Bitcoin address on Bitcoin testnet3. Returns list of unspent outputs with tx hash, position, height, and value in satoshis. |
| btc_testnet_get_transaction | Get full transaction details by txid on Bitcoin testnet3. Returns verbose transaction data including inputs, outputs, confirmations, and block hash. |
| btc_testnet_get_block | Get block header data by height on Bitcoin testnet3. Returns parsed header with hash, version, previous block hash, merkle root, timestamp, bits, and nonce. |
| btc_testnet_get_fee_estimate | Get fee rate estimate on Bitcoin testnet3 for a target number of blocks. Returns estimated fee in BTC/kB and sat/byte. Use target=1 for next-block, target=6 for ~1 hour. Returns -1 if no estimate available. |
| btc_testnet_get_mempool_info | Get mempool fee histogram on Bitcoin testnet3. Returns array of [fee_rate, cumulative_vsize] pairs showing the distribution of transactions in the mempool by fee rate (sat/vB). |
| eth_lookup_selector | Look up a 4-byte function or error selector against 4byte.directory. Returns matching function/error signatures. Useful for identifying unknown calldata selectors or decoding custom errors. |
| eth_get_abi | Fetch a verified contract's ABI from Sourcify by address. Returns the full ABI array and match type ('full' or 'partial'). Returns match_type 'none' for unverified contracts. Defaults to Ethereum mainnet (chain_id 1). |
| eth_resolve_ens | Resolve an ENS name to its Ethereum address. Returns null if the name is not registered or has no address record. Example: 'vitalik.eth' → '0xd8dA6BF26964aF9D68eC99A6d99030B4ec93B700'. |
| eth_lookup_address | Reverse-resolve an Ethereum address to its primary ENS name. Returns null if no primary ENS name is set for the address. |