MCP server directory

Boar blockchain MCP (basic)

One of the ways to connect Boar blockchain MCP (basic)

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.

Provides read-only access to blockchain data across Bitcoin, Ethereum, and Mezo, with 65 tools for balance checks, transaction lookups, contract calls, and ABI decoding. No installation or API key required.

Version:: hosted
Publisher:: boar-network
Company:: Boar Network (third-party)
Docs:: raw.githubusercontent.com/boar-network/blockchain-mcp/HEAD/README.md
Pricing:: This server is free to use.; Summary written by google/gemini-2.5-flash-lite from the server’s own site and README; facts above come from the registries.

Install

Generated from the server’s transport data — never hand-written. Placeholders in angle brackets are yours to fill.

Run it with its own identity, a budget you set, and every call audited — no local config to keep in sync.

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What it can do

As declared by the publisher

Tools · 37

btc_get_balance
Get confirmed and unconfirmed balance for a Bitcoin address on Bitcoin mainnet. Returns balance in satoshis.
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_history
Get transaction history for a Bitcoin address on Bitcoin mainnet. Returns list of transactions with heights and tx hashes.
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_get_transaction
Get full transaction details by txid on Bitcoin mainnet. Returns verbose transaction data including inputs, outputs, confirmations, and block hash.
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_testnet_get_balance
Get confirmed and unconfirmed balance for a Bitcoin address on Bitcoin testnet3. Returns balance in satoshis.
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_history
Get transaction history for a Bitcoin address on Bitcoin testnet3. Returns list of transactions with heights and tx hashes.
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).
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_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.
eth_estimate_gas
Estimate gas required for a transaction on Ethereum mainnet. Returns gas estimate as hex string.
eth_gas_price
Get current gas price on Ethereum mainnet in wei (hex string). Use to estimate transaction costs.
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_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_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_logs
Get event logs matching a filter on Ethereum mainnet. Requires at least fromBlock and toBlock. Optionally filter by contract address and topics.
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.
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_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_lookup_address
Reverse-resolve an Ethereum address to its primary ENS name. Returns null if no primary ENS name is set for the address.
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_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'.
mezo_gas_price
Get current gas price on Mezo in wei (hex string). Use to estimate transaction costs.
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_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_logs
Get event logs matching a filter on Mezo. Requires at least fromBlock and toBlock. Optionally filter by contract address and topics.
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.
mezo_get_transaction
Get transaction details by hash on Mezo. Returns full transaction object including from, to, value, input data, and status.
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.