It lets users search by channel to see which accounts hold moderator, VIP, or founder status and when those roles began, or search by account to find every indexed channel where that account has a role. This reverse lookup fills a gap in Twitch’s own tools, which show broadcasters their channel’s moderators but do not provide the same account-focused view across channels.

The index grows as people search: the first lookup for a channel adds its role lists for others to access. moddex also offers a check for specific account-and-channel pairs, leaderboards, and a public API. Chat bot users can connect API responses to custom commands in Nightbot, StreamElements, or Fossabot. The service does not require an account to search. Twitch users can sign in to opt out, which removes their profile and role lists from moddex and its public API; they can reverse that choice later. moddex states that it is not affiliated with, endorsed by, or sponsored by Twitch Interactive.