🛡️ Nexus AI Agent

2 3 4 > ⚠️ LICENSE NOTICE: THIS IS NOT MIT 5 > This project is protected under the Business Source License 1.1 (BUSL-1.1). 6 > Commercial use is strictly prohibited until March 21, 2030. 7 > Personal, educational, and non-commercial testnet experimentation is permitted.

Nexus MCP - AI Agent Payment Gateway

https://github.com/user-attachments/assets/14d0ec6b-c503-4a78-b47a-0072d33cb279

MCP server with X402 payme

nt integration. Pay with crypto for AI tools.

Quick Start

npm install
npm run build

Create .env:

THIRDWEB_CLIENT_ID=your_client_id
PAYMENT_RECIPIENT=0xYourWalletAddress
MOCK_SETTLEMENT=true  # for testing without tokens

Related MCP server: opendexter

Use with Claude Desktop

Edit ~/.config/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "nexus": {
      "command": "node",
      "args": ["/path/to/nexus-mcp/dist/index.js"],
      "env": {
        "THIRDWEB_CLIENT_ID": "your_client_id",
        "PAYMENT_RECIPIENT": "0xYourWallet"
      }
    }
  }
}

Restart Claude Desktop.

Tools

• get_service_info - FREE

• get_weather - 0.10 USDC

• search_web - 0.15 USDC

• generate_image - 0.50 USDC

• analyze_data - 0.25 USDC

How It Works

1. Claude calls a paid tool

2. Browser opens for payment

3. Connect MetaMask

4. Sign EIP-712 message (no gas!)

5. Payment settles on Base Sepolia

6. Tool executes

Mock Mode

Set MOCK_SETTLEMENT=true to test without real tokens.

Production

1. Remove MOCK_SETTLEMENT

2. Switch to Base mainnet (Chain ID: 8453)

3. Use real USDC: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Done.