linux - curl request in bash script that requires a dollar sign in the URL

I have a problem that I just cannot seem to solve.

I need to make a curl request to a given URL, and the URL requires a dollar sign in it.

So, for example:

www.example.com/mypath/function&$filter=whatever

Now, I can execute this just fine from the command line if I put the URl in single ticks, or if I escape the dollar sign with a backslash, and then put it in a double quote.

Obviously, there is a problem if you do not do either of the above, because bash will see the '$' and will interpret anything after it to mean a variable name.

So when I try:

URL="www.example.com/mypath/function&\\\$filter=whatever"
MYOUTPUT=$(curl -s --header "Authorization: $HEADER" "$URL")

it doesn't work right.

When I try

URL="www.example.com/mypath/function&\$filter=whatever"

MYOUTPUT=$(curl -s --header "Authorization: $HEADER" "'$URL'")

it doesn't work right.

What am I doing wrong?

I can tell it's not working right because the server is not responding the same way in the script as it does in the command line. The site responds in a certain default manner if the query isn't done right, and I always get the default response through the script.