All of helix requires a token.
The docs were bugged and had the requirement accidentally removed
As per the example:
curl -X GET 'https://api.twitch.tv/helix/games/top' \
-H 'Authorization: Bearer cfabdegwdoklmawdzdo98xt2fo512y' \
-H 'Client-Id: uo6dggojyb8d6soh92zknwmi5ej1q2'