The problem Signed.RSVP & Signature.CEO solves

signature.ceo allows users to clearsign messages or create signature requests that they can then send as short URLs to other people who can then sign this message. Ideally, sites can integrate signature.ceo when users sign a terms-of-service, media-release, non-disclosure agreement, vote, or anything alike, and provide a verifiable receipt to users that is checked, trusted, and verified in the frontend.

signed.rsvp is a project that leverages the signature.ceo api to allow users to RSVP to events created by event organizers. After signing and verying you are a unique human you obtain your RSVP ticket aswell as the expected signature.ceo receipt.