MCP Servers

Nexus MCP

MCP server with X402 payment integration, enabling AI agents to access paid tools like weather, web search, and image generation with crypto payments via MetaMask on Base network.

Category

README

🛡️ 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

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

Claude calls a paid tool
Browser opens for payment
Connect MetaMask
Sign EIP-712 message (no gas!)
Payment settles on Base Sepolia
Tool executes

Mock Mode

Set MOCK_SETTLEMENT=true to test without real tokens.

Production

Remove MOCK_SETTLEMENT
Switch to Base mainnet (Chain ID: 8453)
Use real USDC: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Done.

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