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 besoeasy/open-skills --skill get-crypto-pricegit clone --depth 1 https://github.com/besoeasy/open-skillsWrote 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/besoeasy/open-skills/get-crypto-price)<a href="https://agentmods.dev/skills/besoeasy/open-skills/get-crypto-price"><img src="https://agentmods.dev/badge/skills/besoeasy/open-skills/get-crypto-price/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/besoeasy/open-skills/get-crypto-price"><img src="https://agentmods.dev/badge/skills/besoeasy/open-skills/get-crypto-price.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 9 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 Data Exfiltration · line 24 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 30 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 39 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 76 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 83 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 92 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 136 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 142 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Agent Snooping · line 202 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.02018 |
| Opus 5 | $0.00010 | $0.01009 |
| Sonnet 5 | $0.00004 | $0.00404 |
| Haiku 4.5 | $0.00002 | $0.00202 |
Grade A, and why
get-crypto-price scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- Current price (curl): How it starts
The opening of the file, as written. The whole thing — 206 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Get Crypto Price (minimal guide)
This short guide shows how to fetch current prices and at least 3 months of past price action using CoinGecko, Binance, and Coinbase public APIs. It also shows how to compute ATH (highest) and ATL (lowest) within time windows: 1 DAY, 1 WEEK, 1 MONTH.
Quick notes
- Timestamps: many APIs return milliseconds since epoch (ms) or seconds (s). Convert consistently.
- Rate limits: respect exchange rate limits; cache responses when possible.
- Symbols: use canonical pair symbols (e.g.,
BTCUSDTon Binance,bitcoinon CoinGecko).
1) CoinGecko (recommended for simple historical ranges)
- Current price (curl):
curl "https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd"
- Last 90 days (price history):
curl "https://api.coingecko.com/api/v3/coins/bitcoin/market_chart?vs_currency=usd&days=90"
Response contains prices array: [[timestamp_ms, price], ...].
Node.js: Fetch 90 days and compute ATH/ATL for 1d/7d/30d windows.
async function fetchCoinGeckoPrices(coinId = 'bitcoin', vs = 'usd', days = 90) {
const url = `https://api.coingecko.com/api/v3/coins/${coinId}/market_chart`;
const res = await fetch(`${url}?vs_currency=${vs}&days=${days}`);
if (!res.ok) throw new Error(`HTTP ${res.status}`);
const data = await res.json();
return data.prices; // array of [ts_ms, price]
}
function maxMinInWindow(prices, sinceMs) {
const window = prices.filter(([ts]) => ts >= sinceMs).map(([, p]) => p);
if (window.length === 0) return [null, null];
return [Math.max(...window), Math.min(...window)];
}
const prices = await fetchCoinGeckoPrices('bitcoin', 'usd', 90);
const nowMs = Date.now();
const windows = {
'1d': nowMs - 24 * 3600 * 1000,
'1w': nowMs - 7 * 24 * 3600 * 1000,
'1m': nowMs - 30 * 24 * 3600 * 1000,
};
for (const [name, since] of Object.entries(windows)) {
const [ath, atl] = maxMinInWindow(prices, since);
console.log(name, 'ATH:', ath, 'ATL:', atl);
}
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.
- 12d ago First seen · 206 lines · 21 tokens per session scan A e525265ad229
get-crypto-price is a skill published in the GitHub repository besoeasy/open-skills (132 stars, last pushed 7d ago), licensed MIT. It adds 21 tokens to every session and 2,018 once invoked, about $0.0001 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.
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