Is it possible to call an RPC function from curl?

If you go to the API tab and have an RPC function you can click on it and get the code like this:

curl -X POST 'https://zkinvnbbamvnaqhblxrq.supabase.co/rest/v1/rpc/fetch_data1' \
-H "Content-Type: application/json" \
-H "apikey: SUPABASE_KEY" \
-H "Authorization: Bearer SUPABASE_KEY"

where does the argument go?

If you use the API tab it will show you that too if you have parameters...

curl -X POST 'https://zkindffvnbbamvnadfdqhblg.supabase.co/rest/v1/rpc/room_exists' \
-d '{ "roomkey": "value" }' \
-H "Content-Type: application/json" \
-H "apikey: SUPABASE_KEY" \
-H "Authorization: Bearer SUPABASE_KEY"

sweet, ty!