I built Token Watcher because I was horrified by my own AI spending. A few months ago, I was building AI agents using Claude and the MCP ecosystem intensified rapidly. I noticed my token costs were climbing exponentially — but I had zero visibility into where the money was actually going. Was it the chatty agent? The recursive lookups? The caching inefficiency? I started asking other AI developers. The pattern was clear: - "I have no idea what my monthly bill is." - "I disabled Claude's code interpreter to save costs, but I still don't know if it helps." - "OpenAI's dashboard is confusing. Anthropic doesn't show per-chat costs." - "By the time I realized the cost spike, it was too late." So I built Token Watcher — a browser extension that shows you exactly what each conversation costs, in real-time, without any external servers or API keys. The response has been overwhelming: → 52+ installs in the first week → Users report saving 10-40% on token costs by spotting inefficiencies → Developers love the "no external server" design (privacy-first wins) → Teams are using it to enforce budget guardrails We're also shipping Pro ($19/month) for teams that need 30-day history and CSV exports for billing cycles. Next, we're targeting AI agent developers and Cursor/Claude Code power users who are likely burning the most tokens. Token Watcher is completely privacy-first. All data stays on your device. We don't sell your data, we don't require any API keys, and we don't track conversation content — only token costs. Check it out: https://chrome.google.com/websto... Ask me anything — I'm here all day! 🎉

Token Watcher

See exactly what your Claude and ChatGPT conversations cost

See exactly what your Claude and ChatGPT conversations cost