Net::HTTP provides instance-level debugging. Here’s how to toggle it globally with `Net::HTTP.debug=`.

net_http_debug.rb

# config/initializers/net_http_debug.rb

if Rails.env.development?
  require 'net/http'

  Net::HTTP.class_eval do
    class << self
      attr_accessor :debug
    end

    prepend Module.new {
      def initialize(*args)
        super
        set_debug_output(STDERR) if self.class.debug
      end
    }
  end

  Net::HTTP.debug = true
end