mcp-onchain-data

MCP server providing real-time blockchain data for AI agents.

Data Source: OKX DEX API v6 (30+ chains, 1300+ tokens, 500+ DEX sources)

Tools

| Tool | Description | |---|---| | get_gas_prices | Real-time gas prices for Ethereum, BSC, Polygon, Arbitrum, Base | | get_token_info | Token price, market cap, volume, 24h change (OKX + CoinGecko fallback) | | get_dex_quote | Best DEX swap quote with routing, gas estimate, and price impact |

Quick Start

git clone https://github.com/githname123/mcp-onchain-data.git
cd mcp-onchain-data
npm install
npm run build

Configure OKX API credentials

Create .env file:

OKX_PROJECT_ID=your_project_id
OKX_API_KEY=your_api_key
OKX_SECRET_KEY=your_secret_key
OKX_API_PASSPHRASE=your_passphrase

Get credentials from OKX Developer Portal.

Use with Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "onchain-data": {
      "command": "node",
      "args": ["/path/to/mcp-onchain-data/dist/index.js"],
      "env": {
        "OKX_PROJECT_ID": "your_project_id",
        "OKX_API_KEY": "your_api_key",
        "OKX_SECRET_KEY": "your_secret_key",
        "OKX_API_PASSPHRASE": "your_passphrase"
      }
    }
  }
}

Use with OpenClaw

openclaw mcp add onchain-data -- node /path/to/mcp-onchain-data/dist/index.js

Supported Chains (30+)

Ethereum, BSC, Polygon, Arbitrum, Base, Avalanche, Optimism, zkSync, X Layer, Solana, and more.

Examples

Gas Prices

> get_gas_prices(chains: ["ethereum", "bsc"])
ETH: 0.06 Gwei | BSC: 0.05 Gwei

Token Info

> get_token_info(tokenAddress: "0xdAC17F958D2ee523a2206206994597C13D831ec7")
USDT: $1.00 | Market Cap: $184B

DEX Quote

> get_dex_quote(fromToken: "0xEeee...EEeE", toToken: "0xdAC1...1ec7", amount: "1000000000000000000")
1 ETH = 2187.53 USDT | 13 routes | Gas: 2893014

License

MIT