It's a command line to make easy some repeatable tasks.
It's possible encode and decode base64 strings
alfred base64 -encode
or
alfred base64 -decode
It's possible make a HTTP request using any HTTP verbs.
The command use a YAML file to read parameter to make the request. There is a example of YAML file on the root repository.
If you will do a GET request, remove the body section fom file.
alfred url -request -file file_example.yml
It'll return the status code and the body of HTTP response.