One major limitation of the url package is that "the argument must not contain unbalanced braces.".
However I have the problem that sometimes URLs I have to include in my document do not satisfy this rule like the following example:
http://example.org/abc?param=}
Because of the balanced braces rule you can not use:
\url{http://example.org/abc?param=}}
Neither can you escape the curly brace \url{http://example.org/abc?param=\}}.
How can this URL be used in an LaTeX document?
I need to have it clickable and I need the line-breaking behavior for long URLs.

\url{http://example.org/abc?param=%7D}– egreg Mar 18 '14 at 15:51