pp foo.pl
use Mojolicious::Lite -signarues;
get '/foo' => sub($c) { $c->render( json => { foo => 123 } ) };
app->start;
################################################
'/bar' => sub($c) { $c->render( json => { bar => 456 } ) };
post '/baz' => sub($c) {
my $baz = $c->req->json->{baz} || 0;
$c->render( json => { baz => $baz + 42 } );