got a few quirks in there… and unfortunately the $(urlfetch) will not accept a normal js variable as input, it must be an argument command variable such as $(query) or $(1)… but it could go a little something like this…
for !lvl…
!addcom !lvl The streamer is actually level $(urlfetch https://twitch.center/customapi/quote?token=PUBLIC_TOKEN&no_id=1&data=1) in Fortnite
for !setlvl…
!addcom !setlvl $(eval `$(urlfetch https://twitch.center/customapi/editquote?token=PRIVATE_TOKEN&silent=1&data=1%20$(1))`;`The streamer is actually level $(1) in Fortnite; Level changed successfully!`)
for +lvl…
!addcom -a=!setlvl +lvl $(eval let x=`$(urlfetch https://twitch.center/customapi/quote?token=PUBLIC_TOKEN&no_id=1&data=1)`;if(x==x*1){x=x*1;x++};x)
for -lvl…
!addcom -a=!setlvl -lvl $(eval let x=`$(urlfetch https://twitch.center/customapi/quote?token=PUBLIC_TOKEN&no_id=1&data=1)`;if(x==x*1){x=x*1;x--};x)
and a one time use command that i would recommend deleting after u use it to enter the initial number u want saved…