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Xynaptic Crypto Fear & Greed Index
x402
Xynaptic Crypto Fear & Greed Index is a paid API for AI agents from api.xynaptic.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Returns the current crypto market sentiment score (0-100) with classification and interpretation, using the alternative.me Fear & Greed index, plus yesterday's and last week's values.
Price / call$0.005
Success—
StatusUnknown
How this service works
Xynaptic Crypto Fear & Greed — the market sentiment thermometer (alternative.me index, 0-100): current value, yesterday, last week, classification (extreme fear..extreme greed) + interpretation hint for agents. GET no params.
Output
Returns a JSON object with the current fear & greed index value (0-100), its text classification (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), the equivalent values for yesterday and last week, and an interpretation hint to help agents act on the data.
Example use cases
Pre-trade sentiment check
“Before I make any crypto moves today, what's the fear and greed index reading right now — and is the market sentiment better or worse than last week?”
Automated daily market briefing
“Include today's crypto fear and greed score with its classification in my morning market summary, alongside how sentiment has shifted since yesterday.”
Contrarian investment signal
“Is the crypto market currently in extreme fear? I want to know the fear and greed index value and classification so I can look for potential buying opportunities.”
Technical details
Endpoint
GEThttps://api.xynaptic.io/v1/crypto-fear-greed?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pre-aggregated crypto market sentiment snapshot without building your own data pipeline. It is ideal for agents that need to contextualize trading decisions, include sentiment in reports, or trigger workflows based on market mood. It wraps the widely-trusted alternative.me index with agent-friendly interpretation hints, making it more actionable than raw index feeds.
Side effects
- Upstream alternative.me index unavailable — returns error or stale data
- Rate limiting if called excessively in a short period
- Payment failure (x402) if USDC balance is insufficient — returns 402 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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