How to find the secp256k1 api?

I want to use the secp256k1 library https://github.com/bitcoin-core/secp256k1 (or, more specifically I want to use the python wrapper https://github.com/electrumsv/electrumsv-secp256k1).

I have a pretty basic question – how do I find the api for secp256k1? I wanted to reimplement generating a public key using the library.