I don't think so but there are a couple mentions of JWT. This one seems to relevant.
https://github.com/nostr-protocol/nips/pull/469#issuecomment-1519845510
Hey David, do we already have a NIP about transforming a signed event into a short time valid jwt? That would be cool and extendible to full oauth2 or oidc via relays #nostrdev #dev #nostr #auth #jwt nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6
Discussion
Thanks for the hint, I'll try to contribute.