diff --git a/src/kotatsu.cr b/src/kotatsu.cr
index a3764be..1d155c8 100644
--- a/src/kotatsu.cr
+++ b/src/kotatsu.cr
@@ -73,6 +73,22 @@ module Kotatsu
       end
     end
 
+    parser.on "list", "Lists all services" do
+      if File.exists?(CONFIG_FILE) == true
+        conf = JSON.parse(File.read(CONFIG_FILE))
+        services = conf["services"].as_a
+        i = 0
+        while services.size > i
+          puts "##{i}: #{services[i][0]} ; #{services[i][1]} ; #{services[i][2]}"
+          i+=1
+        end
+        exit
+      else
+        STDERR.puts "ERROR! Config file not found: #{CONFIG_FILE}"
+        exit(1)
+      end
+    end
+
     parser.invalid_option do |flag|
       STDERR.puts "ERROR! Not a valid option: #{flag}"
       STDERR.puts "Use -h or --help for all available options"