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 JansenAnalytics/claudex --skill market-data-enginegit clone --depth 1 https://github.com/JansenAnalytics/claudexWrote 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/jansenanalytics/claudex/market-data-engine)<a href="https://agentmods.dev/skills/jansenanalytics/claudex/market-data-engine"><img src="https://agentmods.dev/badge/skills/jansenanalytics/claudex/market-data-engine.svg" alt="Measured on agentmods" 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 | $0.00083 | $0.00964 |
| Opus 5 | $0.00042 | $0.00482 |
| Sonnet 5 | $0.00017 | $0.00193 |
| Haiku 4.5 | $0.00008 | $0.00096 |
Grade A, and why
market-data-engine scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Market Data Engine
Quick Start
SKILL=${CLAUDE_SKILLS_DIR:-$HOME/.claude-agent/.claude/skills}/market-data-engine/scripts
# Collect daily data for all instruments
python3 $SKILL/collect.py --interval 1d
# Collect 1-hour data for forex majors
python3 $SKILL/collect.py --interval 1h --subclass major
# Collect 4-hour data (uses TradingView)
python3 $SKILL/collect.py --interval 4h --instruments EURUSD,GBPUSD
# Currency strength rankings
python3 $SKILL/collect.py --currency-strength --interval 1d --json
# Quick price snapshot of everything
python3 $SKILL/collect.py --snapshot --json
# Backfill 1 year of daily data
python3 $SKILL/collect.py --interval 1d --n-bars 365
Query Data
# Last 30 daily bars for EURUSD
python3 $SKILL/query.py ohlcv EURUSD --interval 1d --last 30
# Latest currency strength
python3 $SKILL/query.py strength --latest
# Latest snapshots
python3 $SKILL/query.py snapshot --latest
# Database stats
python3 $SKILL/query.py stats
Instruments (79 total)
| Class | Count | Examples |
|---|---|---|
| Currency Indices | 8 | DXY, EXY, BXY, JXY, CXY, AXY, ZXY, SXY |
| Forex Majors | 7 | EURUSD, GBPUSD, USDJPY, AUDUSD, USDCAD, USDCHF, NZDUSD |
| Forex Crosses | 21 | EURJPY, GBPJPY, AUDNZD, EURGBP, ... |
| Forex Exotics | 27 | EURNOK, USDNOK, EURSEK, USDTRY, USDZAR, ... |
| Equity Indices | 9 | SPX500, NAS100, DAX, UK100, JPN225, US30, ... |
| Metals | 2 | XAUUSD (Gold), XAGUSD (Silver) |
| Energy | 3 | BRENT, WTI, NATGAS |
| Crypto | 2 | BCH, ETH |
Data Sources
- yfinance — primary for daily/hourly/minute data. Free, no API key.
- tvdatafeed — TradingView data. Required for 4h timeframe and currency indices. Free without login (limited).
- Auto-fallback: yfinance first, tvdatafeed fills gaps.
Intervals
| Interval | yfinance | tvdatafeed | Max History |
|---|---|---|---|
| 1m | ✅ | ✅ | 7 days |
| 5m | ✅ | ✅ | 60 days |
| 15m | ✅ | ✅ | 60 days |
| 30m | ✅ | ✅ | 60 days |
| 1h | ✅ | ✅ | 730 days |
| 4h | ❌ | ✅ | 5000 bars |
| 1d | ✅ | ✅ | max |
| 1w | ✅ | ✅ | max |
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 3d ago First seen · 107 lines · 83 tokens per session scan A 987b43989cfe
market-data-engine is a skill published in the GitHub repository JansenAnalytics/claudex (5 stars, last pushed 2mo ago), licensed MIT. It adds 83 tokens to every session and 964 once invoked, about $0.0004 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 2026-09-03.
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