Boar Blockchain MCP
@boar-network
关于 Boar Blockchain MCP
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
基本信息
配置
使用下面的配置,将此服务器添加到你的 MCP 客户端。
{
"mcpServers": {
"boar-blockchain-mcp-basic": {
"type": "http",
"url": "https://mcp.boar.network/basic"
},
"boar-blockchain-mcp-advanced": {
"type": "http",
"url": "https://mcp.boar.network/advanced"
}
}
}工具
50Execute a read-only smart contract call on Ethereum mainnet. Returns the hex-encoded return data. Use this to read contract state without sending a transaction.
Execute a read-only smart contract call on Mezo. Returns the hex-encoded return data. Use this to read contract state without sending a transaction.
Decode raw EVM revert data from a failed transaction or eth_call on Ethereum mainnet. Handles Error(string) reverts, Panic(uint256) assertions, custom Solidity errors (requires ABI), and silent reverts. Pure computation — no RPC call needed. Pass the hex revert data from a transaction receipt or eth_call error response.
Decode raw EVM revert data from a failed transaction or mezo_call on Mezo. Handles Error(string) reverts, Panic(uint256) assertions, custom Solidity errors (requires ABI), and silent reverts. Pure computation — no RPC call needed. Pass the hex revert data from a transaction receipt or eth_call error response.
Decode raw calldata into function name and typed arguments using a provided ABI on Ethereum mainnet. Pure computation — no RPC call needed. Pass the hex calldata from a transaction input or eth_call.
Decode raw return data from an eth_call into typed values using a provided ABI and function name on Ethereum mainnet. Pure computation — no RPC call needed.
Decode a raw event log (topics + data) into named fields using a provided ABI on Ethereum mainnet. Pure computation — no RPC call needed. Pass topics and data from a transaction receipt log entry.
Decode raw calldata into function name and typed arguments using a provided ABI on Mezo. Pure computation — no RPC call needed. Pass the hex calldata from a transaction input or eth_call.
Decode raw return data from an eth_call into typed values using a provided ABI and function name on Mezo. Pure computation — no RPC call needed.
Decode a raw event log (topics + data) into named fields using a provided ABI on Mezo. Pure computation — no RPC call needed. Pass topics and data from a transaction receipt log entry.
Encode a function call into ABI-encoded calldata hex. Accepts either a human-readable function signature (e.g. 'transfer(address to, uint256 amount)') or a full ABI JSON array plus function name. Pass uint/int values as decimal strings to avoid JS number precision loss. Pure computation — no RPC call needed.
Batch multiple read-only contract calls into a single RPC round trip via Multicall3 on Ethereum mainnet (0xcA11bde05977b3631167028862bE2a173976CA11). Returns success status and raw return data for each call. Use allowFailure=true to prevent one failed call from aborting the whole batch.
Batch multiple read-only contract calls into a single RPC round trip via Multicall3 on Mezo (0xcA11bde05977b3631167028862bE2a173976CA11). Returns success status and raw return data for each call. Use allowFailure=true to prevent one failed call from aborting the whole batch.
Get native token balance for an address on Ethereum mainnet. Returns balance in wei (hex and decimal) and in ether.
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.
Get transaction details by hash on Ethereum mainnet. Returns full transaction object including from, to, value, input data, and status.
Get event logs matching a filter on Ethereum mainnet. Requires at least fromBlock and toBlock. Optionally filter by contract address and topics.
Get current gas price on Ethereum mainnet in wei (hex string). Use to estimate transaction costs.
Estimate gas required for a transaction on Ethereum mainnet. Returns gas estimate as hex string.
Get transaction receipt by hash on Ethereum mainnet. Returns status (0x1=success, 0x0=fail), gasUsed, contractAddress (for contract deployments), and event logs.
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.
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.
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.
Get native token balance for an address on Mezo. Returns balance in wei (hex and decimal) and in ether.
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.
Get transaction details by hash on Mezo. Returns full transaction object including from, to, value, input data, and status.
Get event logs matching a filter on Mezo. Requires at least fromBlock and toBlock. Optionally filter by contract address and topics.
Get current gas price on Mezo in wei (hex string). Use to estimate transaction costs.
Get transaction receipt by hash on Mezo. Returns status (0x1=success, 0x0=fail), gasUsed, contractAddress (for contract deployments), and event logs.
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.
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.
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.
Get confirmed and unconfirmed balance for a Bitcoin address on Bitcoin mainnet. Returns balance in satoshis.
Get transaction history for a Bitcoin address on Bitcoin mainnet. Returns list of transactions with heights and tx hashes.
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.
Get full transaction details by txid on Bitcoin mainnet. Returns verbose transaction data including inputs, outputs, confirmations, and block hash.
Get block header data by height on Bitcoin mainnet. Returns parsed header with hash, version, previous block hash, merkle root, timestamp, bits, and nonce.
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.
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).
Get confirmed and unconfirmed balance for a Bitcoin address on Bitcoin testnet3. Returns balance in satoshis.
Get transaction history for a Bitcoin address on Bitcoin testnet3. Returns list of transactions with heights and tx hashes.
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.
Get full transaction details by txid on Bitcoin testnet3. Returns verbose transaction data including inputs, outputs, confirmations, and block hash.
Get block header data by height on Bitcoin testnet3. Returns parsed header with hash, version, previous block hash, merkle root, timestamp, bits, and nonce.
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.
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).
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.
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).
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'.
Reverse-resolve an Ethereum address to its primary ENS name. Returns null if no primary ENS name is set for the address.
概览
What is Boar Blockchain MCP?
Boar Blockchain MCP is a free, keyless MCP server providing 50 read-only blockchain tools across Bitcoin, Ethereum, and Mezo. It runs on Cloudflare's global edge network and requires no installation or API key.
How to use Boar Blockchain MCP?
Configure the server in your MCP client’s .mcp.json file using either the basic endpoint (https://mcp.boar.network/basic, 37 tools) or the advanced endpoint (https://mcp.boar.network/advanced, 13 tools). Both can be added simultaneously. The server works with Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Gemini CLI.
Key features of Boar Blockchain MCP
- 50 read-only tools across Bitcoin, Ethereum, and Mezo
- No installation, API key, or account required
- Streamable HTTP with SSE fallback transport
- Two endpoints: Basic (37 tools) and Advanced (13 tools)
- Supports Bitcoin mainnet and testnet
- Cross-chain ABI fetch, ENS resolution, and Multicall3 batch reads
Use cases of Boar Blockchain MCP
- Query ETH balances and token holdings from any address
- Retrieve Bitcoin UTXOs and transaction details
- Decode revert reasons for failed Ethereum transactions
- Fetch verified ABIs from Sourcify for smart contracts
- Batch-read contract storage values using Multicall3
FAQ from Boar Blockchain MCP
Is this really free?
Yes. No API key, no account, no payment. Fair use applies.
Is it safe?
All tools are read-only. The server cannot send transactions, access private keys, or modify any blockchain state.
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