you can use nostril https://github.com/jb55/nostril
creating an event will generate a random key if you don’t specify one. nak probably has something like this as well.
nostril uses libsecp256k1 directly, nothing fancy.
Discussion
nak uses the key "1" by default, which is confusing and once a guy made many posts using that key, he set his profile metadata, picture and all that, made a bunch of normal posts, all with the key "1" and while saying he was trying out nak. I didn't have a way to tell him about what he was doing, but that's part of the magic.
🤯🤯🤯🤣🤣🤣🤣🤣