(400) Bad Request when trying to post simple value to an API

Question

I have this LoansController for a web api

[Route(\"api/[controller]\")]
[ApiController]
public class LoansController : ControllerBase
{
    // G         


        

Answer 1

Try to add headers

$url = 'http://localhost:1113/api/loans'
$head = @{'ContentType'='Application/json'}
Invoke-WebRequest -Uri $url -Body $postParams -Method Post -Headers $head