Dynamic ways to inject value to headers for MCP?

[makandre]

Hi, are there other ways to dynamically inject values into headers, other than doing it via environment variables like below?

{
  "mcpServers": {
    "myServer": {
      "type": "streamable-http",
      "url": "https://remotehost:port/mcp",
      "headers": {
        "Authorization": "Bearer ${env:AUTH_TOKEN}"
      }
    }
  }
}