x402 Wallet

Install x402 Wallet for Claude Desktop

Claude Desktop reads mcpServers from claude_desktop_config.json. Restart the app after saving.

1. Open ~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows, or ~/.config/Claude/claude_desktop_config.json on Linux.
2. Paste the JSON config below.
3. Replace placeholder secrets, then restart the client if it does not reload on its own.

{
  "mcpServers": {
    "nirholas-x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/x402-mcp@0.2.3"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "YOUR_SOLANA_SECRET_KEY",
        "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com",
        "MAX_PAY_USD": "1",
        "REQUIRE_CONFIRM": "true",
        "THREE_WS_BASE": "https://three.ws"
      }
    }
  }
}

Official Claude Desktop docs