Gate membership, roles or high-trust actions on portable evidence a newcomer brings with them.
Invite-only communities scale badly: admission depends on somebody already knowing the applicant, which quietly reproduces whoever is already inside.
Open communities have the opposite failure: throwaway accounts, and no way to tell a new member from a bad-faith one until after the damage.
Reputation earned in one community is worth nothing in the next, so every member starts from zero forever.
Because verification is public, this flow works for a community that has no backend of its own: the check can happen in the browser.
<!-- Show verified standing on a member profile -->
<div data-credda-badge data-token="MEMBER_SHARE_TOKEN"></div>
<script src="https://api.credda.io/widget/credda-widget.js" async></script>Full request and response shapes are in the API reference.