Borrowing it
Nothing to install: this file belongs to TheDigitalNinja/mcp-fitbit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/TheDigitalNinja/mcp-fitbit/main/CLAUDE.mdgit clone --depth 1 https://github.com/TheDigitalNinja/mcp-fitbitWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/thedigitalninja/mcp-fitbit/claude-md)<a href="https://agentmods.dev/instructions/thedigitalninja/mcp-fitbit/claude-md"><img src="https://agentmods.dev/badge/instructions/thedigitalninja/mcp-fitbit/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/thedigitalninja/mcp-fitbit/claude-md"><img src="https://agentmods.dev/badge/instructions/thedigitalninja/mcp-fitbit/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01129 | $0.01129 |
| Opus 5 | $0.00564 | $0.00564 |
| Sonnet 5 | $0.00226 | $0.00226 |
| Haiku 4.5 | $0.00113 | $0.00113 |
Grade A, and why
mcp-fitbit CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
89% identical to mcp-fitbit copilot-instructions.md — 18 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Development Guide
Project Overview
MCP server for Fitbit API integration providing health data access (weight, sleep, activities, profile).
Design Philosophy: This MCP server acts as a 1:1 JSON proxy to the Fitbit API. Tools should match the underlying API parameters and limitations exactly, without adding abstraction layers or client-side data manipulation. Return raw JSON responses from Fitbit API calls.
Development Commands
npm run build- Compile TypeScript to build/ directorynpm run start- Run the built MCP servernpm run dev- Build and run with MCP inspector for testing/debuggingnpm run lint- Check code quality and style issuesnpm run format- Auto-fix code formattingnpm test- Run tests with Vitestnpm run test:coverage- Run tests with coverage report
CI/CD
- GitHub Actions workflow runs tests, lint checks, and build on push/PR to main branch
- Located at
.github/workflows/ci.yml
Project Structure
src/index.ts- Main MCP server entry point, registers all toolssrc/auth.ts- OAuth2 flow with token persistencesrc/utils.ts- Shared Fitbit API request utilitiessrc/weight.ts- Weight data tool (time series)src/sleep.ts- Sleep data tool (date range)src/activities.ts- Exercise/activity data tool (date range)src/profile.ts- User profile toolsrc/heart-rate.ts- Heart rate data tools (time series and date range)src/nutrition.ts- Nutrition data tools (comprehensive food log with macros, plus time series for individual nutrients)src/daily-activity.ts- Daily activity summary tool (steps, calories, goals, heart rate zones)src/activity-goals.ts- Activity goals tool (daily/weekly goals)src/activity-timeseries.ts- Activity time series tool (steps, distance, calories over time)src/azm-timeseries.ts- Active Zone Minutes time series toolbuild/- Compiled JavaScript output.env- Environment variables (FITBIT_CLIENT_ID, FITBIT_CLIENT_SECRET)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 84 lines · 1,129 tokens per session scan A 142bfdf7386f
mcp-fitbit CLAUDE.md is an instructions file published in the GitHub repository TheDigitalNinja/mcp-fitbit (33 stars, last pushed 1y ago), licensed MIT. It adds 1,129 tokens to every session, about $0.0056 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to mcp-fitbit copilot-instructions.md, differing in 18 lines, and is treated as a copy.
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