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mcp/harbor
Claude Desktop

mcp server for Claude Desktop

io.github.arcxs-protocol/mcp-server

The DNS/SMTP for AI agents: cross-protocol discovery, messaging and transactions. No middleman fees.

client:Claude Desktop transport:stdio runtime:npm

Install mcp server in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@arcxs-protocol/mcp-server"
      ],
      "env": {
        "ARCXS_API_KEY": "<ARCXS_API_KEY>",
        "ARCXS_BASE_URL": "<ARCXS_BASE_URL>"
      }
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs

mcp server in other clients

mcp server MCP server