Boar blockchain MCP

Free, keyless MCP server with 65 read-only blockchain tools across Bitcoin, Ethereum, and Mezo. No local installation required.

Registry	Basic	Advanced
Glama.ai	boar-blockchain-mcp-basic	boar-blockchain-mcp-advanced
Smithery.ai
mcp.so	basic	advanced
Cursor Directory	boar-blockchain-mcp	boar-blockchain-mcp

🚀 Quick Start

No install. No API key. Just add the URL to your MCP client.

Claude Desktop

Add to your config file (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

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

Claude Code

/plugin marketplace add boar-network/blockchain-mcp
/plugin install boar-blockchain-mcp@boar-network/blockchain-mcp

Or via CLI:

claude mcp add boar-blockchain-mcp-basic --transport http --scope project https://mcp.boar.network/basic
claude mcp add boar-blockchain-mcp-advanced --transport http --scope project https://mcp.boar.network/advanced

Cursor

Add to .cursor/mcp.json in your project root:

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

OpenCode

Add to opencode.json in your project root:

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

More clients: VS Code · Windsurf · Gemini CLI · OpenCode · All setup guides

💡 What Can You Do?

Once connected, try these prompts:

• "What is vitalik.eth's ETH balance?" — resolves ENS name, then 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?" — gets token balance with symbol and decimals
• "Batch-read 5 contract storage values in one call" — Multicall3 batched reads

See the full Prompt Cookbook for 6 detailed agent workflows.

🔗 Endpoints

Endpoint	URL	Tools	Best For
Basic	https://mcp.boar.network/basic	46	Balance checks, transaction lookups, block data, token info, ENS, ABI fetch
Advanced	https://mcp.boar.network/advanced	19	Contract calls, ABI decoding, revert analysis, calldata encoding, Multicall3

Start with /basic. Add /advanced when you need smart contract interaction or transaction debugging. Which should I use?

🛠️ Top Tools at a Glance

Tool	Chain	What It Does
eth_get_balance	Ethereum	Get ETH balance (wei + 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	Transaction receipt with status and logs
eth_get_abi	Any EVM	Fetch verified ABI from Sourcify
btc_get_balance	Bitcoin	Confirmed + unconfirmed balance (satoshis)
btc_get_utxos	Bitcoin	Unspent transaction outputs
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

Full tool reference: Basic tools (46) · Advanced tools (19)

⛓️ Chains Supported

Chain	Network	Tools
Bitcoin	Mainnet	7
Bitcoin	Testnet3	7
Ethereum	Mainnet	14
Mezo	Mainnet	9
Mezo	Testnet	9
Cross-chain	—	4 (selector lookup, ABI fetch, ENS forward + reverse)
Advanced (ETH + Mezo + Mezo testnet)	—	19 (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. Mezo testnet mirrors mainnet with full tool parity (mezo_testnet_ prefix), following the same mainnet/testnet split as Bitcoin.

⚙️ 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. All tools are strictly read-only: no transaction signing, no wallet access, no state mutation. Your AI agent connects over HTTPS using Streamable HTTP transport (with SSE fallback).

❓ 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. It returns publicly available data only.

What MCP transport does it use? Streamable HTTP with SSE fallback. All modern MCP clients support this.

Can I use both endpoints at the same time? Yes. Configure them as two separate MCP servers in your client. See Basic vs Advanced.

Does it support Bitcoin testnet? Yes. All 7 Bitcoin tools have btc_testnet_ equivalents for testnet3.

Does it support Mezo testnet? Yes. All 9 basic and 6 advanced Mezo tools have mezo_testnet_ equivalents.

Who built this? Boar Network.

📚 Documentation

• Basic Tools Reference (46 tools)
• Advanced Tools Reference (19 tools)
• Basic vs Advanced Guide
• Prompt Cookbook — 6 Agent Workflows

📖 Setup Guides

• Claude Desktop
• Claude Code
• Cursor
• VS Code (GitHub Copilot)
• Windsurf
• Gemini CLI
• OpenCode

📋 Policies

• Security
• Privacy
• Support
• Changelog
• License (MIT)