If you want subscribers, no, you will need an oAuth token with the relevant scope applied. As Subscribers is privileged data.
Covers authentication, you will need “oAuth Authorization Code Flow”
Covers the Subscriptions endpoint.
curl -H 'Accept: application/vnd.twitchtv.v5+json' \
-H 'Client-ID: uo6dggojyb8d6soh92zknwmi5ej1q2' \
-H 'Authorization: OAuth cfabdegwdoklmawdzdo98xt2fo512y' \
-X GET 'https://api.twitch.tv/kraken/channels/129454141/subscriptions'
You’ll also need to be able to offset/paginate thru the list, this is a kraken end point so doesn’t “paginate” itself but it does support limit/offset