wangnov/codex-meter

Codex Meter is a Chrome extension that makes it easier to see how much you are actually spending when using ChatGPT's Codex feature. If you use Codex regularly and want a clearer picture of your Credits, token consumption, cache hit rates, and estimated costs, this tool adds a convenient dashboard right inside the analytics page you already use. Instead of sending you to a separate website or dashboard, the extension injects a button and a chart directly into the Codex analytics page on ChatGPT. When you click it, a popup appears showing your current cycle totals, daily usage breakdowns, projected weekly credits, and the estimated dollar value of your usage. You can view charts broken down by credits, total tokens, or turns, and the token charts even separate uncached input, cached input, and output tokens. You can also export your usage history as JSON or CSV files for your own records. This tool is built for developers, product managers, or founders who rely on Codex heavily and need to track resource consumption without leaving their workflow. For example, if you are trying to keep your team under a certain weekly credit limit, or you want to see how much money a specific coding session cost, you can quickly pull up the in-page modal and check the numbers or export the data for a report. A notable thing about how this works is its privacy approach and its dependency on ChatGPT's internal structure. It does not store your login token or require you to log in again, it simply uses the authentication already active on your browser tab. Usage snapshots are saved locally on your machine, not on a remote server. However, because it relies on ChatGPT's private internal analytics endpoints, if OpenAI changes how their page or data is structured, the extension would need an update to keep working. It is also a "buildless" project, meaning it runs directly without a complex compilation step, and it automatically matches your language and light or dark theme settings.