Boar Blockchain MCP

by boar-network

333 downloads
Not rated
GitHub

About

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

Details

Author
boar-network
Downloads
333
Categories
Finance

Jump to

- 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

Setting up with Highlight

This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:

  1. Download and install Highlight from highlightai.com/download
  2. Navigate to the plugins tab and select "Add Custom Plugin"
  3. Configure the plugin with the settings below
    Plugin Name Boar Blockchain MCP
    Command (node, npx, python, etc.)

    Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.

  4. Enable "Start Automatically" if you want the plugin to start when Highlight launches

From the repository

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.

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.

mezo_testnet_get_balance

Get native token balance for an address on Mezo testnet. Returns balance in wei (hex and decimal) and in ether.

mezo_testnet_get_block

Get block data by number or tag on Mezo testnet. Use hex block number (e.g. "0x1") or "latest". Returns full block object with transaction hashes.

mezo_testnet_get_transaction

Get transaction details by hash on Mezo testnet. Returns full transaction object including from, to, value, input data, and status.

mezo_testnet_get_logs

Get event logs matching a filter on Mezo testnet. Requires at least fromBlock and toBlock. Optionally filter by contract address and topics.

mezo_testnet_gas_price

Get current gas price on Mezo testnet in wei (hex string). Use to estimate transaction costs.

mezo_testnet_get_transaction_receipt

Get transaction receipt by hash on Mezo testnet. Returns status (0x1=success, 0x0=fail), gasUsed, contractAddress (for contract deployments), and event logs.

mezo_testnet_get_code

Get bytecode at an address on Mezo testnet. 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_testnet_get_token_balance

Get ERC-20 token balance for a wallet address on Mezo testnet. Returns raw balance, formatted balance with decimals, and token symbol. Calls balanceOf, decimals, and symbol on the token contract.

mezo_testnet_get_token_info

Get ERC-20 token metadata for a token address on Mezo testnet. 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.

Claude Desktop / Cursor

Paste into your MCP client config file to install this server.

{
    "mcpServers": {
        "boar blockchain mcp": {
            "boar-blockchain-mcp-basic": {
                "type": "http",
                "url": "https://mcp.boar.network/basic"
            },
            "boar-blockchain-mcp-advanced": {
                "type": "http",
                "url": "https://mcp.boar.network/advanced"
            }
        }
    }
}

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"
    }
}

Boar Blockchain MCP

Free, keyless MCP server with 50 read-only blockchain tools across Bitcoin, Ethereum, and Mezo. No local installation required. No API key. No account. Just plug in the URL and start querying.

Why Boar Blockchain MCP?

Most blockchain data tools require API keys, rate limit accounts, or complex local setup. Boar Blockchain MCP removes all of that friction. It runs on Cloudflare's global edge network, responds over standard Streamable HTTP (with SSE fallback), and works with every major MCP client out of the box. All 50 tools are strictly read-only -- no transaction signing, no wallet access, no state mutation. It's safe to use in any AI agent workflow.

Quick Start

No install. No API key. Create or edit .mcp.json in your project root: ``json { "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" } } } ` This file can be checked into version control so your whole team gets the same MCP setup. Also supported: Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, Gemini CLI.

Two Endpoints

| Endpoint | URL | Tools | Best For | |----------|-----|-------|----------| | Basic | https://mcp.boar.network/basic | 37 | Balances, transactions, blocks, token info, ENS, ABI fetch | | Advanced | https://mcp.boar.network/advanced | 13 | Contract calls, ABI decoding, revert analysis, calldata encoding, Multicall3 | Start with /basic. Add /advanced when you need smart contract interaction or transaction debugging. Both endpoints can be configured simultaneously as two separate MCP servers.

What You Can Do

Once connected, try prompts like: - "What is vitalik.eth's ETH balance?" -- resolves ENS name, fetches balance - "Show me the UTXOs for 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa" -- Satoshi's address, Bitcoin UTXO set - "Why did transaction 0x... fail?" -- fetches receipt, decodes revert reason - "What ERC-20 tokens does 0x... hold?" -- token balance with symbol and decimals - "Batch-read 5 contract storage values in one call" -- Multicall3 batched reads - "What is the current gas price on Ethereum?" -- live network data - "Decode the calldata for this transaction" -- ABI-based calldata decoding

Top Tools at a Glance

| Tool | Chain | What It Does | |------|-------|--------------| | eth_get_balance | Ethereum | ETH balance in wei and ether | | eth_resolve_ens | Ethereum | Resolve ENS name to address | | eth_get_token_balance | Ethereum | ERC-20 balance with symbol and decimals | | eth_get_transaction_receipt | Ethereum | Receipt with status, logs, and gas used | | eth_get_abi | Any EVM | Fetch verified ABI from Sourcify | | btc_get_balance | Bitcoin | Confirmed + unconfirmed balance in satoshis | | btc_get_utxos | Bitcoin | Unspent transaction outputs | | btc_get_transaction | Bitcoin | Transaction details and confirmations | | mezo_get_balance | Mezo | Native token balance on Mezo | | eth_call | Ethereum | Read-only smart contract call | | eth_multicall | Ethereum | Batch contract reads via Multicall3 | | eth_decode_revert | Ethereum | Human-readable revert reason from a failed tx |

Chains Supported

| Chain | Network | Tools | |-------|---------|-------| | Bitcoin | Mainnet | 7 | | Bitcoin | Testnet3 | 7 | | Ethereum | Mainnet | 15 | | Mezo | Mainnet | 8 | | Cross-chain | -- | 4 (selector lookup, ABI fetch, ENS forward + reverse) | | Advanced (ETH + Mezo) | -- | 13 (contract calls, decoders, encoding, multicall) | Mezo is a Bitcoin-first blockchain built on Cosmos SDK with EVM compatibility. All Ethereum EVM tools have Mezo equivalents -- same interface, different chain.

How It Works

Boar Blockchain MCP is a remote MCP server running on Cloudflare Workers' global edge network. Every request is stateless -- no sessions, no stored data, no authentication. Tools return publicly available on-chain data only. Transport: Streamable HTTP with SSE fallback. All modern MCP clients support this natively.

FAQ

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. Can I use both endpoints at the same time? Yes. Configure them as two separate MCP servers in your client as shown above. Does it support Bitcoin testnet? Yes. All 7 Bitcoin tools have btc_testnet_` equivalents for testnet3. Who built this? Boar Network -- infrastructure for Bitcoin-native applications.
No reviews yet — be the first

Sign in to leave a review

Use Google, GitHub, or an email account so ratings stay tied to real people.

Email sign in

No reviews posted yet.

Install

Add to Claude Desktop or Cursor

{
    "mcpServers": {
        "boar blockchain mcp": {
            "boar-blockchain-mcp-basic": {
                "type": "http",
                "url": "https://mcp.boar.network/basic"
            },
            "boar-blockchain-mcp-advanced": {
                "type": "http",
                "url": "https://mcp.boar.network/advanced"
            }
        }
    }
}

More like this

Similar MCP servers you might find useful

Browse category

Stripe

The Stripe Agent Toolkit enables popular agent frameworks including OpenAI's Agent SDK, LangChain, CrewAI, Vercel's AI SDK, and Model Context Protocol (MCP) to…

878
Cloud Service

Defeatbeta Api

An open-source alternative to Yahoo Finance's market data APIs with higher reliability.

689
Finance