When your agents get complex
Simulation-based AI agent testing and evaluation that turns unpredictable agents into reliable production systems.
This is the 4th launch from LangWatch. View more
Claude Code usage tracking by LangWatch
Launched this week
Track Claude Code usage: cost, cache, session replay. Run `npx langwatch claude` once. Every session gets cost with cache reads/writes as separate token classes, every bash and MCP call as a span, theoretical vs billed for your Max plan, and a full terminal replay in the UI. Works for Codex too.









Free
Launch Team




Documentation.AI
The combination of cost tracking, session replay, and tool tracing makes this much more than another analytics dashboard. Congrats on launching!!!
LangWatch
@roopreddy that's right! LangWatch is currently the most powerfull observability tool for it! But I might be a bit bias! ;)
Voquill
The terminal replay is a nice touch. Being able to see what happened makes this much more useful. Nice work!
LangWatch
@henry_habib absolutely and it allows you to improve your prompt skills as well! Let us know once you've tried, happy to help out!
great product! knowing the per-seat cost but not which sessions burned is a proper problem, especially as the costs keep rising. this is going to save me from getting broke!
LangWatch
@lina_dikhtiaruk hope ai coding solutions will also bring your team / product / company the speed and competitie advantage to win the game and get more revenue in ,! But we’ll def be there to nbe more efficient
Congrats on shipping this! Finally a way to know exactly how much those late-night Claude Code sessions are costing me. My wallet thanks you already!
LangWatch
@better_shaya haha very welcome!
10xlaunch.ai
The one-command setup makes trying it out much less intimidating. 😊
LangWatch
@nir0b must have right now!
I really enjoy seeing having a completing picture of all subagents per skill. then associated by model? and even having the granular cost? ok that was nice.
LangWatch
@sergio_cardenas_espinoza love it that you already tried it! Let's go!
ConnectMachine
This solves a problem many developers don't realize they have until the AI bill shows up. And if they have setup the credit card that's a red zone LOL
LangWatch
@syed_shayanur_rahman true - and right now it might be a nice to have, but the moment control is more needed withing organisations this will be a must have for any org!