statcode is like man but for HTTP status codes. Most web developers spend considerable time looking at response codes (usually errors) and then Googling what they mean. But with statcode, you can simply run $ statcode [status_code] and get a quick explanation of your HTTP response without leaving the terminal.
statcode works on MacOS, Linux, and Windows, with compiled binaries available for every release. You can also install it with pip:
$ pip install statcode
Requires Python 3.0 or higher.