MCP EVM Signer MCP Server: Secure Blockchain Interactions for AI Applications

Overview: What is MCP EVM Signer MCP Server?

The MCP EVM Signer is an MCP (Model Context Protocol) server designed to securely manage Ethereum private keys, connect to Infura for blockchain interactions, and facilitate the deployment of smart contracts. This server provides a standardized interface that enables AI applications such as Claude Desktop, Continue, Cursor, and others to interact with Ethereum-compatible blockchains through the Model Context Protocol.

🔧 Core Features & MCP Capabilities

The MCP EVM Signer offers several critical features that enhance its utility for artificial intelligence (AI) applications:

1. Secure Storage of Private Keys: Users can securely store their Ethereum private keys locally, ensuring that sensitive information remains within their control.
2. Infura Integration: Seamless connection to Infura for blockchain interaction, enabling access to a variety of Ethereum and EVM-compatible blockchains.
3. Smart Contract Deployment: Ability to deploy smart contracts from compiled ABIs and bytecode. This feature is particularly useful for developing custom dApps or integrating existing smart contracts into AI workflows.
4. Transaction Signatures and Send Operations: Signing and sending transactions securely, ensuring that any action performed on the blockchain can be authenticated by the server.
5. Blockchain Data Queries: Fetching account balances and transaction history, providing real-time data access for AI applications.
6. Contract Interaction Methods: Call read-only and state-modifying methods of deployed contracts, allowing AI applications to perform complex operations within smart contract ecosystems.

⚙️ MCP Architecture & Protocol Implementation

MCP Protocol Flow Diagram

To illustrate the operational flow between an AI application, the MCP server, and external data sources/tools, we have provided a Mermaid diagram:

graph TD
    A[AI Application] -->|MCP Client| B[MCP Protocol]
    B --> C[MCP Server]
    C --> D[Data Source/Tool]
    style A fill:#e1f5fe
    style C fill:#f3e5f5
    style D fill:#e8f5e8

MCP Client Compatibility Matrix

The MCP EVM Signer supports a range of AI applications through its adherence to the Model Context Protocol. Below is a compatibility matrix highlighting the support status:

MCP Client	Resources	Tools	Prompts	Status
Claude Desktop	✅	✅	✅	Full Support
Continue	✅	✅	✅	Full Support
Cursor	❌	✅	❌	Tools Only

🚀 Getting Started with Installation

Prerequisites

1. Node.js v16 or higher.
2. An Infura account with API key.
3. Claude for Desktop app installed.

Step-by-Step Installation Guide

1. Clone the repository:

   git clone https://github.com/zhangzhongnan928/mcp-evm-signer.git
   cd mcp-evm-signer
   

2. Install dependencies:

   npm install
   

3. Build the project:

   npm run build
   

4. Configure environment variables:

   cp .env.example .env
   

   Edit the .env file to add your Infura API key and configure other settings.

💡 Key Use Cases in AI Workflows

Implementing the MCP EVM Signer into an AI workflow can significantly enhance its capabilities, particularly when interacting with Ethereum-based smart contracts. Here are two use cases:

Real-Time Portfolio Management

Using the check-balance tool, an AI application like Continue can monitor the balance of a user's wallet in real-time, providing insights and alerts based on predefined thresholds or patterns.

Example Command:

mcp-evm-signer check-balance 0x1234...5678 --network sepolia

Automated Token Deployment

The deploy-contract tool can be used to automate the deployment of ERC-20 tokens. This process involves specifying the compiled ABI and bytecode, followed by deploying it via an AI application.

Example Command:

mcp-evm-signer deploy-contract --abi path/to/abi.json --bytecode path/to/bytcode.json --network sepolia

🔌 Integration with MCP Clients

The MCP EVM Signer provides a standardized interface for connecting with MCP clients. Below is an example of how to integrate it with Claude Desktop:

{
  "mcpServers": {
    "evm-signer": {
      "command": "node",
      "args": ["/path/to/mcp-evm-signer/build/index.js"],
      "env": {
        "INFURA_API_KEY": "your_infura_api_key_here",
        "DEFAULT_NETWORK": "sepolia",
        "ENCRYPT_KEYS": "true",
        "KEY_PASSWORD": "your_secure_password_here"
      }
    }
  }
}

📊 Performance & Compatibility Matrix

Example Usage in AI Workflows

1. Creating a Wallet

   mcp-evm-signer create-wallet
   

2. Checking Wallet Balance on Sepolia Network

   mcp-evm-signer check-balance 0x1234...5678 --network sepolia
   

These commands showcase the command-line capabilities of the MCP EVM Signer, making it easy for developers to integrate these tools into their AI workflows.

🛠️ Advanced Configuration & Security

Example Configuration File Snippet

Here is a snippet from the .env configuration file:

API_KEY=your_infura_api_key_here
DEFAULT_NETWORK=sepolia
ENCRYPT_KEYS=true
KEY_PASSWORD=secure_password_here

Security Notes

• Private Keys Storage Protection: Keys are stored locally on your machine for enhanced security.
• Encrypted Keys with Passwords: The keys can be encrypted using a password, providing an additional layer of protection.
• Limitations by MCP Protocol: The server only exposes functionalities through the model context protocol, ensuring secure interactions.

❓ Frequently Asked Questions (FAQ)

1. Q: How do I ensure the security of my private keys? A: Private keys are stored locally and can be encrypted with a password for added security.

2. Q: Can this server be used across multiple AI clients like Claude Desktop, Continue, and Cursor? A: Yes, it supports these clients through the MCP protocol.

3. Q: How do I securely configure environment variables on deployment? A: Use an encrypted .env file to store sensitive data and protect it from exposure.

4. Q: Is there support for multiple networks like Sepolia or Goerli? A: Yes, use the --network parameter with target network names such as sepolia or goerli.

5. Q: Can I contribute to this project if I find issues or have features to enhance? A: Fork the repository, create a feature branch, and open a pull request.

👨‍💻 Development & Contribution Guidelines

To contribute to this project:

1. Fork the repository.
2. Create a feature branch (git checkout -b feature/amazing-feature).
3. Make your changes.
4. Commit your changes (git commit -m 'Add some amazing feature').
5. Push to the branch (git push origin feature/amazing-feature).
6. Open a Pull Request.

🌐 MCP Ecosystem & Resources

For more detailed documentation, refer to:

• Usage Guide: Detailed usage instructions and examples
• Examples: Sample workflows and contract deployments

Conclusion

The MCP EVM Signer is a powerful tool for AI applications aiming to interact with Ethereum-based blockchains. Its comprehensive features and stringent security measures make it an invaluable component in any system requiring blockchain integration through the Model Context Protocol.

By providing secure data management, efficient smart contract deployment mechanisms, and seamless AI client compatibility, the MCP EVM Signer streamlines complex operations while maintaining a high level of security and flexibility.