How to give Timeout parameter to API calls

I'm running the project using this command:
rclone rcd --rc-web-gui --rc-user admin --rc-pass admin --rc-serve --rc-addr 0.0.0.0:5572

Now I wrote a simple SDK to call Apis like config/create or operations/uploadfile.

How can I give parameters like contimeout or timeout to apis calls? already tried to pass it through URL parameters and form-data but does not work.

sample curl:

curl -X POST \
  -u "admin:admin" \
  -d "fs=test:hamid-bucket" \
  -d "remote=" \
  -d "timeout=2s" "http://localhost:5572/operations/list"