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mcp/harbor
Claude Desktop

Relay for Claude Desktop

io.github.relayprotocol/relay-mcp

Cross-chain bridge and swap quotes, fee estimation, and transaction tracking via Relay Protocol.

client:Claude Desktop transport:stdio runtime:npm

Install Relay 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": {
    "relay-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@relayprotocol/relay-mcp"
      ],
      "env": {
        "RELAY_API_KEY": "<RELAY_API_KEY>",
        "RELAY_API_URL": "<RELAY_API_URL>"
      }
    }
  }
}

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

Relay in other clients

Relay MCP server