public class Settings
{
   public static readonly int MaxCount = 10000;
   public int CountryServer = 123; //Для теста
   public static readonly int BaseValue = 146;
}

[Route("api/[controller]")]
[ApiController]
public class ServerController : ControllerBase
{
   // GET: api/Server/action
   [HttpGet("[action]")]
   public IActionResult ServerSettings()
   {
      Settings settings = new Settings();
      return Ok (settings);
   }
}

public class Settings
{
    private static readonly int MaxCount = 10000;
    public int CountryServer = 123; //Для теста
    private static readonly int BaseValue = 146;
    public int maxCount = MaxCount;
    public int baseValue = BaseValue;
}