Linea MCP Server

A Model Context Protocol (MCP) server that provides on-chain tools for AI applications to interact with the Linea blockchain.

Overview

Linea-MCP extends any MCP client's capabilities by providing tools to interact with the Linea blockchain, an Ethereum Layer 2 scaling solution using zero-knowledge proof technology. This server enables AI assistants like Claude, Cursor, and other MCP-compatible clients to perform blockchain operations through natural language requests.

Key Features

Wallet Management: Retrieve addresses and check balances
Token Operations: Transfer ERC20 tokens, check balances, list tokens
Smart Contract Interactions: Deploy and call contracts
NFT Management: List and transfer NFTs
Bridge Operations: Bridge assets between Ethereum and Linea
DeFi Integrations: Interact with DeFi protocols
Verax Integration: Verify identity with Linea Verax attestations
Linea ENS: Resolve and manage Linea ENS names

See examples.md for detailed usage examples.

Quick Start

Prerequisites

Node.js (v16+)
npm or yarn
Access to Linea RPC endpoints

Installation Options

Option 1: Quick Install (Global Package)

bash

# Install globally
npm install -g linea-mcp

# Create a basic .env file
echo "LINEA_MAINNET_RPC_URL=https://rpc.linea.build
LINEA_TESTNET_RPC_URL=https://rpc.sepolia.linea.build
WALLET_PRIVATE_KEY=your_wallet_private_key_here
INFURA_API_KEY=your_infura_key_here" > .env

# Start the server
linea-mcp

Option 2: Development Install (From Source)

bash

# Clone the repository
git clone https://github.com/qvkare/linea-mcp.git
cd linea-mcp

# Install dependencies
npm install

# Configure environment
cp .env.example .env
# Edit .env with your configuration

# Build and start
npm run build
node dist/index.js  # Using Node directly is more reliable than npm start

Integration with MCP Clients

This MCP server can be integrated with any MCP-compatible client including Cursor, Claude Desktop, Windsurf, Cline, and other AI assistants.

General Configuration Steps

1. Find your client's MCP configuration file location

2. Add a Linea MCP server configuration section

3. Configure the server using one of the following approaches:

Option 1: Using Global Installation (Simple)

json

{
  "mcpServers": {
    "linea": {
      "command": "npx",
      "args": ["linea-mcp@latest"],
      "env": {
        "PORT": "3000",
        "LINEA_MAINNET_RPC_URL": "https://rpc.linea.build",
        "LINEA_TESTNET_RPC_URL": "https://rpc.sepolia.linea.build",
        "INFURA_API_KEY": "your_infura_key",
        "ALCHEMY_API_KEY": "your_alchemy_key",
        "PRIVATE_KEY_ENCRYPTION_KEY": "your_encryption_key_please_change",
        "WALLET_PRIVATE_KEY": "your_wallet_private_key_or_mnemonic",
        "NODE_ENV": "development",
        "ETHEREUM_RPC_URL": "https://mainnet.infura.io/v3/your_infura_key",
        "ETHEREUM_TESTNET_RPC_URL": "https://sepolia.infura.io/v3/your_infura_key"
      }
    }
  }
}

Option 2: Using Local Installation (Recommended for Development)

json

{
  "mcpServers": {
    "linea": {
      "command": "node",
      "args": ["/absolute/path/to/linea-mcp/dist/index.js"],
      "cwd": "/absolute/path/to/linea-mcp",
      "env": {
        // Same environment variables as Option 1
        "PORT": "3000",
        "LINEA_MAINNET_RPC_URL": "https://rpc.linea.build",
        // ... other variables from Option 1
      }
    }
  }
}

Important Note: When using a local installation, directly running the JavaScript file with Node.js provides more reliable communication than using npm scripts.

Client-Specific Locations

Cursor:
Windows: %APPDATA%\Cursor\mcp.json
macOS: ~/Library/Application Support/Cursor/mcp.json
Linux: ~/.config/Cursor/mcp.json

Claude Desktop:
Windows: %APPDATA%\Claude\claude_desktop_config.json
macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Linux: ~/.config/Claude/claude_desktop_config.json

Other Clients: Refer to your client's documentation for MCP configuration location

Troubleshooting

Common Issues

1. "No tools available" or "Client closed" errors:

Use direct Node.js execution ("command": "node", "args": ["/path/to/dist/index.js"]) instead of npm scripts
Ensure environment variables are configured correctly
Restart your client after configuration changes

2. JSON parsing errors in logs:

These indicate communication protocol issues
Using direct Node.js execution usually resolves these problems
Make sure the cwd property is set correctly

3. Complete troubleshooting guide:

See docs/troubleshooting.md for detailed solutions to common problems

Available Tools

The server provides tools across multiple categories:

Wallet: Address management, balance checking, fund transfers
Tokens: ERC20 transfers, balance checking, token information
Contracts: Deployment and interaction
NFTs: Listing and transfers
Bridge: Asset bridging between Ethereum and Linea
DeFi: Liquidity pools, token swaps, yield farming
ENS: Name resolution and record management
Verax: Identity verification

For a complete list of tools and their usage, see docs/tools.md.

Security Considerations

Never share your private keys or seed phrases
Use environment variables for sensitive configuration
Test extensively with testnet before using on mainnet

License

This project is licensed under the MIT License - see the LICENSE file for details.

Linea Mcp

Documentation