Test App Validation

Hosted

Submit your app manifest URL

Don't forget a protocol! Try adding either http:// or https://.
Manifest URLs must start with a protocol (for example, http:// or https://) and typically use the .webapp extension.

Learn more about submitting an app.

The validator is a tool which can help test your app for errors, best practices, and compliance with Marketplace guidelines before actually submitting your app for review. If you're interested in how it works or would like to run a copy of your own, the source code is available on Github.