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Why

Claude Code shows you your usage in /usage: how much of the 5-hour session and the weekly limit you've burned. The model itself can't see any of it. Ask it to "keep this project under 20% of my week" and it has to guess.

claude-usage-mcp gives the AI the same numbers you see, as tools it can call, plus a simple budget it can check between steps.

Related MCP server: llm-quota-mcp

Install

Needs Node 18+ and Claude Code logged in with a Pro or Max plan.

git clone https://github.com/AlphaSaleAidan/claude-usage-mcp ~/claude-usage-mcp
claude mcp add -s user claude-usage -- node ~/claude-usage-mcp/server.mjs

Restart Claude Code and try:

"What's my usage right now?"

"Budget 20% of my weekly on the website rebuild."

Tools

Tool

What it does

get_usage

Session (5-hour) %, weekly %, per-model weekly caps, and time until each resets

budget_start

Start a budget for a project: the max % of your weekly limit it may use

budget_check

How much of the budget is used and left, with a status: OK, LOW, or OVER_BUDGET

budget_end

Delete a budget

get_usage returns:

{
  "session_pct": 38,
  "session_resets_in": "2h 14m",
  "weekly_pct": 62,
  "weekly_resets_in": "3d 9h",
  "weekly_resets_at": "2026-10-04T09:59:59+00:00",
  "weekly_fable_pct": 12
}

budget_check returns:

{
  "project": "website-rebuild",
  "budget_pct": 20,
  "used_pct": 14,
  "remaining_pct": 6,
  "status": "OK"
}

Budgets carry over the weekly reset (usage from before the reset still counts) and live in ~/.claude/usage-budgets.json.

Make Claude check in on its own

Add this to your CLAUDE.md:

When a usage budget is active for the current project, call budget_check between major
steps and stop to tell me when it says LOW or OVER_BUDGET.

Usage in your status bar

See your limits at the bottom of Claude Code at all times. Add this to ~/.claude/settings.json:

"statusLine": {
  "type": "command",
  "command": "node ~/claude-usage-mcp/server.mjs --statusline"
}
session 38% (2h 14m)  ·  week 62% (3d 9h)  ·  website-rebuild 14/20%

Any number turns yellow at 75% and red at 90% of its limit.

From the terminal

node ~/claude-usage-mcp/server.mjs    # prints usage + all budgets as JSON

How it works

It reads your existing Claude Code login (~/.claude/.credentials.json, or the macOS Keychain) and calls the same endpoint /usage uses. Your token is only ever sent to api.anthropic.com. Results are cached for 60 seconds in ~/.claude/usage-cache.json, so the status bar never hammers the API.

Good to know

  • Budgets are account-wide. A budget measures how much your weekly % went up since it started. Other Claude sessions running at the same time count against it too.

  • Unofficial endpoint. Anthropic doesn't document it, so it may change. Open an issue if it breaks.

  • Expired login? Run any claude command once, then retry.

  • Overrides: CLAUDE_CONFIG_DIR, CLAUDE_OAUTH_TOKEN, CLAUDE_USAGE_BUDGETS.

Not affiliated with Anthropic.

License

MIT © 2026 Aidan Pierce

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