TokenLens for Claude is a free Chrome add-on designed to enhance user experience by providing real-time tracking of token usage, context windows, and rate limits directly within the Claude.ai interface. This tool aims to eliminate the guesswork often associated with usage limits, offering features like a live progress bar for 5-hour and 7-day quotas, a countdown timer for limit resets, and peak hour detection to monitor system performance.

With TokenLens, users can access essential stats such as token speed, estimated API costs, and average latency, all without needing an account or compromising privacy. It seamlessly integrates into the Claude interface, making it an ideal solution for heavy users, developers, and researchers who need to monitor their usage effectively. By providing accurate and timely information, TokenLens helps users manage their Claude sessions more efficiently.