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Crypto Fear & Greed Index
x402
Crypto Fear & Greed Index is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).
Returns the current Crypto Fear & Greed Index score (0–100) with day-over-day change and optional historical data up to 30 days
Price / call$0.002
Success—
StatusUnknown
How this service works
The crypto Fear & Greed Index (alternative.me): 0 = extreme fear, 100 = extreme greed, from volatility, momentum, volume, social and dominance — plus the day-over-day change and recent history. The one-number market-mood read an agent uses to size risk. Pass days= for history (up to 30). A sentiment gauge, not a signal. Not financial advice.
Output
Returns the current Fear & Greed Index score (0 = extreme fear, 100 = extreme greed), the named sentiment label (e.g. 'Fear', 'Greed', 'Neutral'), the day-over-day change, and an array of historical data points if days > 1 was requested — sourced from alternative.me and derived from volatility, momentum, volume, social signals, and BTC dominance.
Example use cases
Daily crypto mood check
“What's the crypto Fear & Greed Index right now — is the market fearful or greedy today?”
30-day sentiment trend review
“Pull the crypto Fear & Greed Index for the past 30 days so I can see how market sentiment has trended this month.”
Risk-sizing decision support
“Before I rebalance my crypto portfolio, grab the Fear & Greed Index for the last 14 days so I can see if we're in an extreme zone.”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/fear-greed?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single, standardized crypto market sentiment score without building your own aggregation logic. It is ideal for agents that need to contextualize market conditions before executing trades, rebalancing portfolios, or generating market commentary. Prefer it over raw price feeds when the goal is mood or risk-level classification rather than exact price data.
Side effects
- days parameter exceeds 30 — capped or returns error
- Network or upstream alternative.me outage returns unavailable data
- Invalid days value (non-numeric) causes a 400-level error
- Payment not completed results in 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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