We have a few existing modules that use javascript to dynamically render parts of a front end. It is not possible or practical to pass our javascript through a parser, and we cannot rely on a cached signwriter image to always be present.

It would be nice of signwriter provided a URL endpoint which would return/redirect to a signwriter generated image. the endpoint would accept some querystring values which would determine the text and profiled used to render the image... eg endpoint.php?text=XXX&profile=XXX