In this article, the author builds a MongoDB Billing Dashboard using the MongoDB Atlas API, Stitch, and Charts. The dashboard allows users to visualize their spending in real-time, with features such as charts showing total spend over time, biggest spenders by SKU, and heat maps plotting projects against SKUs. To create the dashboard, the author uses MongoDB Stitch functions to retrieve invoice data from the Atlas API, creates a view to transform the data into a human-readable format, and then uses MongoDB Charts to visualize the data in real-time. The author also shares insights from their experience building the dashboard, including identifying unusual spending patterns and using the dashboard to control costs. Finally, they provide ideas for extending the dashboard to include additional features such as hosting a static web page with embedded charts and incorporating other details returned by the Atlas API.