The cat command returns a random image from The Cat API.
Usage
!cat
Example response
https://cdn2.thecatapi.com/images/zFm4AbO-d.jpg
Preview:

Source code
def cat():
raw = requests.get("https://api.thecatapi.com/v1/images/search")
if raw.status_code != 200:
return f"{error_messages['cat']} (HTTP {raw.status_code})"
try:
data = raw.json()
response = choice(output["general"]["cat"]).replace(r"{{URL}}", data[0]["url"])
except (requests.exceptions.JSONDecodeError, KeyError, IndexError):
response = error_messages["cat"]
return response