MegghysAPI/Controllers/PublicController.cs

using Microsoft.AspNetCore.Mvc;

namespace MegghysAPI.Controllers
{
    [Route("api/public")]
    [ApiController]
    public class PublicController : MControllerBase
    {
        [Route("header")]
        public IActionResult Header()
        {
            return Ok(string.Join(",", context.Request.Headers.Keys));
        }
    }
}