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intervals-icu-mcp: Instructions file for Claude Code

CLAUDE.md

intervals-icu-mcp CLAUDE.md is an instructions file for Claude Code from hhopke/intervals-icu-mcp. It costs 1,873 tokens per session, scanned A, original, MIT.

Project instructions for an MCP server, which lets Claude and other language models access Intervals.icu training, wellness, and performance data. It documents the Python project, its commands, architecture, and configuration.

In plain words
What is it for?
Use it when developing this repository, setting up authentication, running its test or lint commands, building its Docker image, or understanding its tool and resource structure.
Why use it?
It gives a coding agent the project context needed to install, run, test, check, format, and release the server consistently.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

This is hhopke/intervals-icu-mcp's own configuration. It tells Claude Code how to work on intervals-icu-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything intervals-icu-mcp configures →

not rated 64repo +1 changed 5d ago A scan 1,873 tokens original MIT
View source ↗ hhopke/intervals-icu-mcp
Reuse

Borrowing it

Nothing to install: this file belongs to hhopke/intervals-icu-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/hhopke/intervals-icu-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/hhopke/intervals-icu-mcp

Made for: Claude Code.

Wrote this? Show the measurements

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Per session 1,873 This file is loaded in full into every session.
When invoked 1,873 The same file — it is already loaded in full.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01873 $0.01873
Opus 5 $0.00937 $0.00937
Sonnet 5 $0.00375 $0.00375
Haiku 4.5 $0.00187 $0.00187

Measured 5d ago against content hash bb9b133987a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

intervals-icu-mcp CLAUDE.md scanned grade A with 1 finding 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 5d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- `openapi-spec.json` — Intervals.icu API specification. Kept up to date automatically via `.github/workflows/update-openapi.yml` (or run `curl -s https://intervals.icu/api/v1/docs > openapi-spec.json` to update locally)
CLAUDE.md · 143 lines

How it starts

The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code when working with this repository.

Project Overview

MCP (Model Context Protocol) server for Intervals.icu — provides up to 62 tools, 4 resources, and 9 prompts for accessing training data, wellness metrics, and performance analysis through Claude and other LLMs. The default INTERVALS_ICU_DELETE_MODE=safe registers 59 tools; full registers all 62, none registers 56.

  • Language: Python 3.11+
  • Framework: FastMCP
  • API Client: httpx (async)
  • Validation: Pydantic v2
  • Auth: pydantic-settings + .env

Development Commands

make install          # Install dependencies
make auth             # Set up Intervals.icu credentials (.env)
make run              # Run the MCP server
make test             # Run tests
make test/athlete     # Run tests matching "athlete"
make test/verbose     # Verbose test output
make lint             # Lint (ruff + pyright)
make format           # Auto-format code
make can-release      # Full pre-release check (same as CI)
make docker/build     # Build Docker image
make docker/run       # Run Docker container

Architecture (Quick Reference)

Component File Role
Server server.py Entry point, registers tools/resources/prompts
Middleware middleware.py Validates config, injects ICUConfig into context
Client client.py Async HTTP client (Basic Auth, 30s timeout)
Auth auth.py Loads credentials from .env
Response response_builder.py Consistent JSON structure (data/analysis/metadata)
Models models.py Pydantic models for API responses
Workout syntax workout_syntax.py Intervals.icu workout DSL reference for LLMs
Tools tools/ 13 tool modules (see below)

For detailed architecture: see docs/architecture.md

Tool Categories

  1. activities.py — Query/manage activities
  2. activity_analysis.py — Streams, intervals, best efforts
  3. activity_messages.py — Notes/comments on activities
  4. athlete.py — Profile, fitness metrics (CTL/ATL/TSB)
  5. wellness.py — HRV, sleep, recovery
  6. events.py — Calendar queries
  7. event_management.py — Create/update/delete events
  8. performance.py — Power/HR/pace curves
  9. curves.py — HR and pace curve analysis
  10. workout_library.py — Browse workout folders and plans
  11. gear.py — Manage gear and reminders
  12. sport_settings.py — FTP, FTHR, pace thresholds
  13. custom_items.py — Charts, custom fields, zones, etc.

Read the full file on GitHub · 143 lines

Changes

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.

  1. 5d ago Changed · -1 lines · -162 tokens per session bb9b133987a4
  2. 11d ago First seen · 144 lines · 2,035 tokens per session scan A 92da6468b913

Subscribe to this mod's changes

intervals-icu-mcp CLAUDE.md is an instructions file published in the GitHub repository hhopke/intervals-icu-mcp (64 stars, last pushed 2d ago), licensed MIT. It adds 1,873 tokens to every session, about $0.0094 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

LLMPythonfitness-trackingintervals-icumcpmcp-server
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