Cccost

cccost - Claude Code Cost Tracker

Track token usage and costs for your Claude Code sessions in real-time.

Problem

Claude Code does not show cost for users of the Pro and Max plan when using the `/cost` command. API users enjoy that privilege. Except that [`/cost` has a bug (CC 1.0.83)](https://x.com/badlogicgames/status/1957221028603535617). And if you wrote a fancy [statusline](https://docs.anthropic.com/en/docs/claude-code/statusline) script and think you can just parse the session transcript to get token usage and cost, think again. The transcript does not contain all requests Claude Code issues to the Anthropic servers.

What Claude Code Cost Tracker does

Claude Code cost track is a minimally invasive tool. Instead of running Claude Code directly, run your session via cccost. All arguments you pass will be forwarded to Claude Code verbatim:

cccost --dangerously-skip-permissions

cccost spawns Claude Code and injects [this code](./src/interceptor.ts). It hooks the NodeJS `fetch()` function and intercepts all API requests to Anthropic's servers. It then writes a file ~/.claude/projects/mangled-current-working-dir/sessionid.usage.json and keeps updating it with every new request. As opoosed to Claude Code's `/cost` slash command, this also accurately tracks cost and token usage when resuming sessions.

The file contains total input/output/cache read/cache write statistics per model, the usage stats for the last request made with each model, and the total cost. E.g.:

{
  "requests": 7,
  "totalCost": 0.10331005,
  "models": {
    "claude-3-5-haiku-20241022": {
      "requests": 6,
      "input_tokens": 731,
      "output_tokens": 99,
      "cache_creation_input_tokens": 0,
      "cache_read_input_tokens": 0,
      "cost": 0.0009808,
      "last": {
        "utcTimestamp": 1755475841151,
        "input_tokens": 335,
        "output_tokens": 9,
        "cache_creation_input_tokens": 0,
        "cache_read_input_tokens": 0,

...