If you’re looking for a simple service for monitoring your MongoDB (things like opening a connection to the database or executing a query and processing the results), then you might find interesting a new type of the watcher added to the Sentry. The MongoDB watcher uses the C# MongoDB Driver under the hood but it’s been implemented in a way, that it’s possible to provide any driver that you’d like. In this post I’ll present how to use it and why it’s been implemented this way instead of another one.