rfc7519
Internet Engineering Task Force (IETF) M. Jones Request for Comments: 7519 Microsoft Category: Standards Track J. Bradley ISSN: 2070-1721 Ping Identity N. Sakimura NRI May 2015 JSON Web Token (JWT) Abstract JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties.
https://datatracker.ietf.org/doc/html/rfc7519