App attribution
Optionally send X-Title (your app's name) and HTTP-Referer (its URL). They split your usage by app and, with a public URL, list your app on the apps leaderboard.
curl https://api.ultragpt.pro/v1/chat/completions \
-H "Authorization: Bearer $ULTRAGPT_API_KEY" \
-H "X-Title: My App" \
-H "HTTP-Referer: https://myapp.com" \
...