Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add chrisdoc/hevy-mcp --skill hevy-workoutsgit clone --depth 1 https://github.com/chrisdoc/hevy-mcpWrote 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/skills/chrisdoc/hevy-mcp/hevy-workouts)<a href="https://agentmods.dev/skills/chrisdoc/hevy-mcp/hevy-workouts"><img src="https://agentmods.dev/badge/skills/chrisdoc/hevy-mcp/hevy-workouts/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/skills/chrisdoc/hevy-mcp/hevy-workouts"><img src="https://agentmods.dev/badge/skills/chrisdoc/hevy-mcp/hevy-workouts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00033 | $0.00451 |
| Opus 5 | $0.00016 | $0.00226 |
| Sonnet 5 | $0.00007 | $0.00090 |
| Haiku 4.5 | $0.00003 | $0.00045 |
Grade A, and why
hevy-workouts 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 9d 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.
What it actually says
Hevy workout workflows
Use the Hevy MCP connector for the user's authenticated Hevy account.
MCP server connection
This plugin registers the remote MCP server as hevy through the repository's
.mcp.json file:
{
"mcpServers": {
"hevy": {
"type": "http",
"url": "https://mcp.hevy-mcp.dev/mcp",
"oauth": true
}
}
}
When the plugin is installed, connect or authorize the hevy server in Claude's
connector settings. The authorization page asks the user for their Hevy API
key. Never put an API key in this skill, plugin files, or a conversation. If the
server is unavailable, ask the user to complete the connector authorization
instead of attempting to start a different server.
Use the tools and resources exposed by the hevy server for Hevy requests. Do
not call the Hevy API directly or invent an alternative authentication path.
Analysis and retrieval
- Prefer
get-training-summaryfor a high-level trend across workouts and body measurements. - Use focused list and detail tools when the user asks about a particular workout, routine, exercise, or date.
- State the date range and distinguish observations from recommendations.
- Cite the workout or measurement evidence used in a summary when practical.
Mutations
- Treat create and update tools as state-changing operations.
- Before changing Hevy data, summarize the proposed change and confirm it with the user unless the user has already given an unambiguous instruction to make that exact change.
- Never invent completed set results, workout times, body measurements, or other missing values. Ask the user for missing values.
- Explain that create operations can produce duplicates if retried and that update operations replace existing values.
Health context
Workout and body-measurement data is personal information. Describe trends without diagnosing medical conditions, and recommend a qualified professional for medical advice.
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.
- 9d ago First seen · 53 lines · 33 tokens per session scan A b281f436bcf9
hevy-workouts is a skill published in the GitHub repository chrisdoc/hevy-mcp (456 stars, last pushed yesterday), licensed MIT. It adds 33 tokens to every session and 451 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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