Borrowing it
Nothing to install: this file belongs to CRJFisher/ariadne. 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/CRJFisher/ariadne/main/.claude/skills/mcp-analytics/SKILL.mdgit clone --depth 1 https://github.com/CRJFisher/ariadneWrote 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/crjfisher/ariadne/mcp-analytics)<a href="https://agentmods.dev/skills/crjfisher/ariadne/mcp-analytics"><img src="https://agentmods.dev/badge/skills/crjfisher/ariadne/mcp-analytics/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/crjfisher/ariadne/mcp-analytics"><img src="https://agentmods.dev/badge/skills/crjfisher/ariadne/mcp-analytics.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 19 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 25 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 31 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00021 | $0.00451 |
| Opus 5 | $0.00010 | $0.00226 |
| Sonnet 5 | $0.00004 | $0.00090 |
| Haiku 4.5 | $0.00002 | $0.00045 |
Grade A, and why
mcp-analytics 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
MCP Analytics
Query Ariadne MCP tool usage analytics from JSONL files.
When to Use
Use when the user asks about MCP tool usage, session history, or analytics (e.g., "check my MCP analytics", "how many tool calls today", "show recent MCP sessions").
How to Use
Run the analytics CLI:
npx tsx packages/mcp/src/scripts/ariadne_analytics.ts
For time-filtered results:
npx tsx packages/mcp/src/scripts/ariadne_analytics.ts --since 2026-02-17
For per-session detail:
npx tsx packages/mcp/src/scripts/ariadne_analytics.ts --session <session-id>
The data directory defaults to ~/.ariadne/analytics/. Override with ARIADNE_ANALYTICS_DIR env var.
Interpreting Results
- Total sessions: Number of MCP server process startups with analytics enabled
- Total tool calls: Aggregate count across all sessions
- Calls by tool: Breakdown showing call count, average duration, and failure count per tool
- Recent sessions: Last N sessions with client info, project path, and call count
High failure counts or increasing average durations indicate performance issues worth investigating.
Optional: SQLite Import
The JSONL files can be converted to CSV and imported into SQLite for ad-hoc queries:
cd ~/.ariadne/analytics
jq -r '[.session_id, .started_at, .project_path, .client_name, .client_version] | @csv' sessions.jsonl > sessions.csv
jq -r '[.session_id, .tool_name, .called_at, .duration_ms, .success, .error_message, .arguments, .request_id, .tool_use_id] | @csv' tool_calls.jsonl > tool_calls.csv
sqlite3 analytics.db ".mode csv" ".import sessions.csv sessions" ".import tool_calls.csv tool_calls"
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 · 55 lines · 21 tokens per session scan A 1c88641f9d04
mcp-analytics is a skill published in the GitHub repository CRJFisher/ariadne (22 stars, last pushed 6d ago), licensed MIT. It adds 21 tokens to every session and 451 once invoked, about $0.0001 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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