nostr:npub17cshxgdnwfyz3t7advxcrmf8shcjwgtquh5z59v4w34rnq6ll73sc4fsmn Here is a gist that tests the presence of JSON functions: https://gist.github.com/groue/046ebddb4a410304094c022d756081c8 Unexpected results are reported as XCTest failures. I hope it will be handy for you!