Support Remote MCP Servers

Please add support for remote MCP servers, configured via URL. Or if already supported, please add documentation on how to set them up.

I'm try to add the Zapier MCP server to Claude Code.

In Cursor you configure it like this:

{
  "mcpServers": {
    "Zapier Actions MCP": {
      "url": "https://actions.zapier.com/mcp/my-mcp-url"
    }
  }
}

I tried doing this (and a few other variations) with Claude Code but got an error:

claude mcp add-json zapier-mcp '{ "Zapier Actions MCP": { "url": "https://actions.zapier.com/mcp/my-mcp-url" } }'

Invalid configuration: command: Required

It seems it's expecting a command, not a URL.