CS Inventory Observer

A personal market to keep an eye on

Counter-Strike: Global Offensive was a game I played, but its inventory also became a small collection of investments. After a while, it was difficult to remember what I had paid, what the items were worth now, and whether the overall value had moved since my last check.

The useful question was simple: is the inventory going up or down?

Turning a hobby into a dashboard

I made CS Inventory Observer as a focused localhost tool rather than a public product. The interface was built around a few pieces of information that were actually useful to me:

• The current value of the tracked inventory
• The latest prices returned by the Steam Community API
• A comparison with the previous snapshot
• A quick percentage change instead of a wall of raw numbers

The project used Vite and TypeScript, with REST API requests handling the connection to Steam and the browser handling the small amount of state needed between visits.

The interesting constraint

There was no full backend, account system, or deployment to hide the complexity behind. Every part of the experience had to stay understandable inside a small personal project, including the API key setup and the question of what data should be remembered locally.

The takeaway

This was a side project, but it gave me a useful lesson in product thinking: a dashboard does not need dozens of metrics when one clear comparison is the reason someone opened it. The best part was turning a personal curiosity into a tool with a clear answer.