mcpwatch MCP server

👁 mcpwatch

Every MCP server you've installed is charging you tokens on every single session. See the bill — then cut it.

mcpwatch records the real traffic between your coding agent (Claude Code, Codex, Cursor, Claude Desktop) and your MCP servers, then itemises what that setup actually costs you in context — and tells you exactly what to delete.

One command. All local. Zero config. No account, ever.

<!-- demo.gif goes here before launch: record with scripts/seed-demo.ts --keep-running + mcpwatch ui -->

Here's what nobody tells you when you install an MCP server: its tool definitions get injected into your agent's context at the start of every single session, whether you use that server or not. A big vendor integration with 50 tools can cost you 15,000+ tokens before you type a word. You pay it again on the next session, and the next.

On top of that you're paying for tool responses that return 200 kB when you needed one row, calls that fail and get retried, and agents re-fetching things they already had.

None of it shows up anywhere. mcpwatch records the actual bytes on the wire and turns them into an itemised bill.

See your number in ten seconds

No setup, no restart, no waiting. This starts each MCP server you already have configured, asks it for its tool list the way your client does, measures it, and shuts it down:

npx @sreelal727/mcpwatch audit

Every new session pays ~9,262 tokens ($0.05) to load these tool definitions,
before you type a word:

  github         8,825 tokens   52 tools   95%   Cursor
  filesystem       437 tokens    6 tools    5%   Cursor
                 9,262 tokens  every session

At 10 sessions a day that is ~2,778,600 tokens a month ($13.89 at $5/M) spent
before any work happens.

"github" alone is 95% of that. If you do not use it in every project, moving it to
the projects that need it is the single biggest win available to you.

That's the fixed cost, and it's knowable without recording anything.

Then find out what you actually use

Which of those tools you call does need real traffic. Instrument once, work normally for a day, and ask:

npx @sreelal727/mcpwatch init     # then restart your client
npx @sreelal727/mcpwatch cost     # a day later

Your MCP setup costs ~12,486 tokens per session before you type a word ($0.06 at $5/M tokens).

PER-SESSION TAX — tool definitions loaded into every new session:
  github        10,762 tokens   46 tools, none used  ← never called
  filesystem       780 tokens    8 tools, 2 used
  postgres         944 tokens    9 tools, 1 used
                12,486 tokens, every session

AT YOUR ACTUAL PACE — 34.9 server startups/day over 11.3 days:
  ~4,362,755 tokens/month ($21.81) on tool definitions alone, before any work happens
  ~4,939,089 tokens/month ($24.70) all in

Shortened. The full README is on GitHub.