Most of the endpoints under the /api/ URL have been used by Twitch internally to power the website, and now replaced by GQL endpoints.
(GQL is also an undocumented API that YOU as a third party should NOT be using)
And whilst they exist and were/can/are/were callable by Third parties doesn’t me we can/should.
They are undocumented, as in not in the docs, as they were NEVER intended for third parties to use.
And people like yourself used them anyway.
They will remain undocumented as you are not supposed to be using them, and have started to be blocked/removed from use.
So there will be no
for these endpoints.