simple way to get routes info

gistfile1.rb

require 'rails/application/route_inspector'
all_routes = Rails.application.routes.routes.select { |r| r.defaults[:controller] =~ /api\/v1/ }
inspector = Rails::Application::RouteInspector.new
pp inspector.format(all_routes, 'api/v1/inboxes').map { |x| x.split(' ') }

# [["api_v1_inbox",
#   "POST",
#   "/api/v1/inboxes/:id(.:format)",
#   "api/v1/inboxes#update"],
#  ["api_v1_inboxes",
#   "GET",
#   "/api/v1/inboxes(.:format)",
#   "api/v1/inboxes#index"]]