You really mean LNURL por better say LN Address?

nostr:nprofile1qqs22d4tralncqfnh2kmmarjkxk8449hwnk5xtqe3y5yry6hy7ytegqpzemhxue69uhk2er9dchxummnw3ezumrpdejz7qgcwaehxw309ahx7um5wghxvmt59emkj73wvf5h5tcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsymkvl9 is the real self-sovereign 

Good options (3rd party domain) are:

npub.cash

nostercheck.me

zeuspay.com