Blockchain Signer

A secure system that enables AI assistants to interact with blockchain smart contracts while ensuring users have full control over their private keys and transaction signatures.

Finance Artificial intelligence chatbots #Blockchain interaction #Secure transactions #AI assistants #Multi-chain support Local .TypeScript

rating : 2.5 points

downloads : 22

update time : 2025-04-28

What is MCP Blockchain Server?

The MCP Blockchain Server is a secure bridge between AI assistants and blockchain networks. It allows AI to read blockchain data and prepare transactions while keeping your private keys safe in your own wallet.

How does it work?

The system consists of a server that prepares transactions, a web interface for approval, and secure connections to blockchain networks. You always control the final signing step.

When should I use it?

Perfect when you want AI assistance with blockchain transactions but don't want to compromise security. Great for DeFi interactions, NFT management, and other Web3 activities.

Key Features

Blockchain Data AccessRead balances, contract states and other on-chain information through simple API calls

Transaction PreparationAI assistants can prepare transactions for your review before you sign them

Multi-Chain SupportWorks with Ethereum, Polygon and other EVM-compatible blockchains

Security-First DesignYour private keys never leave your wallet - we never have access to your funds

Wallet IntegrationConnect with MetaMask and other popular Web3 wallets

Pros and Cons

Advantages

Complete control over your private keys

AI can assist with complex blockchain operations

Clear transaction review before signing

Supports multiple blockchain networks

Open source and transparent

Limitations

Requires manual approval for each transaction

Currently focused on EVM-compatible chains

Need to trust the AI's transaction preparation

Getting Started

Connect Your Wallet

Use the web interface to connect your preferred Web3 wallet (like MetaMask)

Interact with AI

Ask your AI assistant to perform blockchain operations (check balance, prepare transfer, etc.)

Review Transaction

When a transaction is prepared, review all details in the web interface

Sign and Submit

Approve the transaction in your wallet to execute it on the blockchain

Example Use Cases

Checking Token BalanceAsk your AI assistant to check your USDC balance on Polygon

Sending CryptoPrepare an ETH transfer to another wallet

Interacting with Smart ContractsExecute a function on a DeFi protocol

Frequently Asked Questions

Is my private key safe?

Which wallets are supported?

What blockchains are supported?

Can I cancel a prepared transaction?

Additional Resources

GitHub Repository

Source code and technical documentation

Smart Contract Security Guide

Learn how to stay safe when interacting with smart contracts

Web3 Wallet Setup Tutorial

How to install and configure MetaMask

🚀 MCP Blockchain Server & DApp

A security system that enables AI assistants to interact with blockchain smart contracts while ensuring users have full control over their private keys and transaction signatures.

🚀 Quick Start

This project addresses a crucial challenge in the integration of AI and blockchain: enabling AI assistants to read blockchain data and prepare transactions while ensuring users have exclusive control over transaction signatures and private keys.

✨ Features

MCP Server Features

Blockchain Data Access: Read balances, contract statuses, and other on-chain data.
Transaction Preparation: Create unsigned transactions pending user approval.
Multi-chain Support: Compatible with Ethereum, Polygon, and other EVM-compatible chains.
Smart Contract Interaction: Read from verified smart contracts on supported networks.
Security-first Design: Private keys never leave the user's wallet.

Web DApp Features

Wallet Integration: Connect with MetaMask and other Web3 wallets.
Transaction Review: A clear user interface for viewing transaction details before signing.
Transaction Signing: Sign transactions using the connected wallet.
Transaction Tracking: Monitor the status of submitted transactions.
Mobile Compatibility: Responsive design for all devices.

🔧 Technical Details

Security Principles

Private Key Isolation: Keys never leave the user's wallet.
Transaction Verification: A clear user interface for reviewing transaction details.
API Authentication: Secure API key management.
Rate Limiting: Prevent abuse.
Caching: Redis is used to cache frequently accessed data.
Database: A PostgreSQL database is used to store users, API keys, and transaction records.

System Components

MCP Server: A Model Context Protocol server that provides blockchain operations as tools for AI assistants.
Web DApp: A React application that provides a user interface for wallet connection and transaction signing.
Database: A PostgreSQL database for storing users, API keys, and transaction records.
Cache: Redis for caching frequently accessed data.

📦 Installation

To install the project:

# Install dependencies using npm
npm install

# Start the development server
npm run dev

# Build the production version
npm run build

💻 Usage Examples

Troubleshooting

If you encounter dependency issues:

# MCP SDK issue - Install directly from GitHub
npm uninstall @modelcontextprotocol/sdk
npm install modelcontextprotocol/typescript-sdk

For database connection issues, refer to the Database Setup Guide.

📄 License

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

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