XarnMaybe don't send unrendered html in the exception you send to your API users?
```
13:12:52 Connecting to https://api.github.com using xxx/****** (xxxxxx)
ERROR: Error while retrieving pull request 139 merge hash : org.kohsuke.github.ServiceDownException: <!DOCTYPE html>
<!--
Hello future GitHubber! I bet you're here to remove those nasty inline styles,
DRY up these templates and make 'em nice and re-usable, right?
Please, don't. https://github.com/styleguide/templates/2.0
-->
```