This API can be integrated into a slack Slash command - simply configure your slash command to point at https://waterdrips.o6s.io/cat-api
This will deliver cat pictures/Gifs directly into the channel the command was invoked in.
Prefer dogs to cats? That's ok too. There's an endpoint for that: https://waterdrips.o6s.io/dog-api
Got you covered. https://waterdrips.o6s.io/joke-api
Got that too... https://waterdrips.o6s.io/roll