Did you not see this part of the readme?
# And if you need headers, pass them inside a positional Hash: say post 'https://httpbin.org/post?foo=42&bar=x', %(:Some<Custom-Header>), :some<form>, :42args;
Did you not see this part of the readme?
# And if you need headers, pass them inside a positional Hash: say post 'https://httpbin.org/post?foo=42&bar=x', %(:Some<Custom-Header>), :some<form>, :42args;