Curl: Bypass proxy for localhost

try below, to bypass proxy service for local ips

export no_proxy=localhost,127.0.0.1

After

curl -v --noproxy localhost, http://localhost/muestra

curl responded with

About to connect() to localhost port 80 (#0)
* Trying 127.0.0.1... 
* Connected to localhost (127.0.0.1) port 80 (#0)

So it clearly stated that it connected to localhost.