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Claude Desktop supports MCP servers natively. You can add Caylex as an MCP server in the Claude Desktop configuration file to give Claude access to all your connected tools.

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Configuration

Add the following to your claude_desktop_config.json file:
Edit ~/Library/Application Support/Claude/claude_desktop_config.json:
claude_desktop_config.json
{
  "mcpServers": {
    "caylex": {
      "url": "https://proxy.caylex.ai/mcp",
      "headers": {
        "x-api-key": "ck_abc123.your-secret-key",
        "x-user-email": "you@example.com"
      }
    }
  }
}
Replace ck_abc123.your-secret-key with your actual Navigator Instance API key and you@example.com with your email.

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Setup

1

Get your API key

Go to your Navigator Instance in the Caylex dashboard and create or copy an API key. See Navigators & Permissions for details.
2

Authenticate with servers

Make sure you have authenticated with the servers in your project via an Auth Link. Use the same email address you put in the configuration file.
3

Edit the config file

Open the claude_desktop_config.json file and add the Caylex MCP server configuration shown above.
4

Restart Claude Desktop

Restart Claude Desktop for the configuration to take effect. You should see Caylex listed as an available MCP server.
Claude Desktop now has access to all tools from your Caylex project. Try asking Claude to interact with one of your connected services.

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Limitations

Claude Desktop uses a static configuration — the x-user-email is fixed in the config file. This means:
  • The same user credentials are used for all conversations
  • You cannot dynamically switch users without editing the config file
  • This is best suited for personal use or development/testing
For production applications where you need to support multiple users, use a programmatic integration like the OpenAI Agents SDK, LangChain, or Claude Agent SDK where you can set x-user-email dynamically per request.

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Further reading