ctxlens-cli is a command-line tool that profiles the context windows of AI agents built with LLMs such as OpenAI and Claude. It surfaces exactly which inputs are consuming tokens, flags wasteful content, and helps developers reduce costs and improve performance. Ideal for anyone building or debugging autonomous agents and RAG systems.
ctxlens-cli is a LLM eval & observability product. It focuses on understanding and reducing unnecessary token consumption in AI agent context windows. ctxlens-cli is an open-source project aimed at AI developers. The project is open source (MIT). It runs on the command line.
It is developed by royalpinto007, and the product first shipped in 2026. The project is developed in the open on GitHub with 35 commits in the last 90 days. Among its 4 catalogued features are Context Profiling, Token Analysis, and Waste Detection.
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