You can embed a badge declaring that your project is gated and therefore by definition always has a working build. Since there is only one status to report, it is a simple static file:

Zuul: Gated

To use it, simply put into an RST or markdown formatted README file, or use it in an <img> tag in HTML.

For advanced usage Zuul also supports generating dynamic badges via the REST api. This can be useful if you want to display the status of e.g. periodic pipelines of a project. To use it use an url like instead of the above mentioned url. It supports filtering by project, pipeline and branch.