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Token Volatility Calculator (CoinGecko-backed)
x402
Token Volatility Calculator (CoinGecko-backed) is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Computes daily and annualized historical volatility (log-return standard deviation) for any CoinGecko-listed crypto token over a configurable lookback window
Price / call$0.005
Success—
StatusUnknown
How this service works
Token volatility / historical volatility / annualized vol / standard deviation of returns / crypto vol calculator. For any CoinGecko-listed token, computes log-return standard deviation over the last N days (default 30) and annualizes by sqrt(365). Returns daily and annualized volatility as percent, count of return observations, first and last close prices. Backed by CoinGecko's free public market_chart endpoint.
Output
Returns daily volatility as a percent, annualized volatility as a percent (scaled by sqrt(365)), the count of log-return observations used, and the first and last closing prices from the lookback window.
Example use cases
Example prompt
“What's the annualized historical volatility of Ethereum (ethereum on CoinGecko) over the last 60 days? I want the daily and annualized vol as percentages.”
Technical details
Endpoint
POSThttps://x402-deployer.x402-deployer.workers.dev/token-volatilityWhen to prefer
Use this endpoint when you need a quick, computed historical volatility figure for a CoinGecko-listed token without building your own price-history pipeline. Ideal for options pricing inputs, risk scoring, portfolio analytics, or any agent task that needs annualized vol as a ready-to-use number. Prefer this over raw price endpoints when you specifically need the standard deviation of log returns already annualized.
Side effects
- Token ID not found on CoinGecko — returns error indicating invalid coin ID
- Insufficient price history for requested window — fewer observations than expected
- CoinGecko rate limit hit on the free public endpoint — upstream 429 error
- Invalid or missing request body fields — validation error response
- Network timeout reaching CoinGecko market_chart API
Input
{
"input": {
"body": {
"days": 60,
"coingecko_id": "ethereum"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
}Output
{
"days": 60,
"source": "coingecko",
"coingecko_id": "ethereum",
"returns_count": 60,
"last_price_usd": 1731.0302008195085,
"first_price_usd": 2264.8143990219965,
"daily_volatility_pct": 2.5794,
"annualized_volatility_pct": 49.2791
}Tags
x402
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