Contracts MCP server

@cryptoapis-io/mcp-contracts

MCP server for Crypto APIs Contracts product. Get token details by contract address for EVM and Solana.

API Version: Compatible with Crypto APIs version 2024-12-12

Features

• EVM contracts: Get token details by contract address (blockchain, network, contractAddress)
• Solana contracts: Get token details by contract address (network, contractAddress)

Prerequisites

1. Register at Crypto APIs
2. Generate an API key

Installation

npm install @cryptoapis-io/mcp-contracts

Or install all Crypto APIs MCP servers: npm install @cryptoapis-io/mcp

Usage

# Run with API key
npx @cryptoapis-io/mcp-contracts --api-key YOUR_API_KEY

# Or use environment variable
export CRYPTOAPIS_API_KEY=YOUR_API_KEY
npx @cryptoapis-io/mcp-contracts

# HTTP transport (listens on 127.0.0.1; see "Exposing the server beyond localhost")
npx @cryptoapis-io/mcp-contracts --transport http --port 3000 --api-key YOUR_API_KEY

Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claudedesktopconfig.json on macOS, %APPDATA%\Claude\claudedesktopconfig.json on Windows):

{
  "mcpServers": {
    "cryptoapis-contracts": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-contracts"],
      "env": {
        "CRYPTOAPIS_API_KEY": "your_api_key_here"
      }
    }
  }
}

Cursor

Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):

{
  "mcpServers": {
    "cryptoapis-contracts": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-contracts"],
      "env": {
        "CRYPTOAPIS_API_KEY": "your_api_key_here"
      }
    }
  }
}

MCP Inspector

npx @modelcontextprotocol/inspector npx @cryptoapis-io/mcp-contracts --api-key YOUR_API_KEY

n8n

1. Start the server in HTTP mode:

npx @cryptoapis-io/mcp-contracts --transport http --port 3000 --api-key YOUR_API_KEY

1. In your n8n workflow, add an AI Agent node
2. Under Tools, add an MCP Client Tool and set the URL to http://localhost:3000/mcp

n8n in Docker: localhost inside the container is not your machine. Start the server with --host 0.0.0.0 and MCPAUTHTOKEN set (see Exposing the server beyond localhost), use http://host.docker.internal:3000/mcp as the URL, and add an Authorization: Bearer header to the MCP Client Tool credential.

All servers default to port 3000. Use --port to assign different ports when running multiple servers.

Available Tools

evmcontractdata

Get token details by contract address.

Supported Blockchains: ethereum, ethereum-classic, binance-smart-chain (mainnet, mordor, testnet, sepolia)

Contract token details are currently available for Ethereum, Ethereum Classic, and BSC only.

solanacontractdata

Get Solana token details by contract address.

Supported Networks: mainnet, devnet

CLI Arguments

Shortened. The full README is on GitHub.