GET api/monitor

MonitorController.cs

[Route("api/[controller]")]
[ApiController]
public class MonitorController : Controller
{
    private readonly IActionDescriptorCollectionProvider _provider;

    public MonitorController(IActionDescriptorCollectionProvider provider)
    {
        _provider = provider;
    }

    [HttpGet]
    public IActionResult GetRoutes()
    {
        var routes = _provider.ActionDescriptors.Items.Select(x => new {
            Action = x.RouteValues["Action"],
            Controller = x.RouteValues["Controller"],
            Name = x.AttributeRouteInfo?.Name,
            Template = x.AttributeRouteInfo?.Template
        }).ToList();
        return Ok(routes);
    }
}