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Crypto Fear & Greed Index
x402
Crypto Fear & Greed Index is a paid API for AI agents from skinwinking.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Returns the current Crypto Fear & Greed Index value, classification, and historical data for up to 30 days
Price / call$0.001
Success—
StatusUnknown
How this service works
50 pay-per-call tools for agents over x402 (USDC on Base, Polygon, Solana): crypto market data, token audits, indicators, swap routing, web extraction, DNS/WHOIS/email checks, FX, weather and AI text/image tools.
Output
Returns a JSON object with the current fear/greed index value (0-100 integer), a text classification (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), and an array of historical data points for the requested number of past days.
Example use cases
Pre-trade sentiment check
“Before I make any crypto moves today, what's the current fear and greed index — is the market in fear or greed right now?”
Monthly sentiment trend review
“Pull the crypto fear and greed index for the past 30 days so I can see how market sentiment has shifted over the last month.”
Contrarian buy signal analysis
“What's the fear and greed index been for the last 7 days? I want to know if we're in extreme fear territory, which might be a good buying opportunity.”
Technical details
Endpoint
GEThttps://skinwinking.com/api/v1/data/fear-greed?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call crypto market sentiment snapshot without managing API keys or subscriptions. It is ideal for agents that infrequently need sentiment data and want to pay micro-amounts per call in USDC. Prefer this over free alternatives when operating in an autonomous agent context that already uses x402 micropayment flows.
Side effects
- Invalid 'days' parameter outside 1-30 range returns validation error
- Payment not included or insufficient USDC results in HTTP 402 response
- Upstream data source unavailable may return 503 or empty history array
- Network timeouts if the x402 payment settlement is slow
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"value": 50,
"history": [],
"classification": "Neutral"
}
}Tags
x402
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