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SiteCheck Crypto Fear & Greed Index
x402
SiteCheck Crypto Fear & Greed Index is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-15).
Retrieves the current and historical Crypto Fear & Greed Index values with sentiment classification (Fear, Greed, etc.) for up to 30 days.
Price / call$0.001
Success—
StatusUnknown
How this service works
The Crypto Fear & Greed Index today and for the previous days (up to 30), with its classification (extreme fear to extreme greed). Attribution: alternative.me. Information only, not financial advice.
Output
Returns today's Fear & Greed Index value (0-100) with a classification label (e.g. 'Greed', 'Fear', 'Extreme Fear', 'Extreme Greed'), plus an array of historical daily values for the requested number of days, each with date, numeric value, and classification. Also includes source attribution and a disclaimer.
Example use cases
Daily crypto sentiment check
“What's the current crypto fear and greed index score and is the market in fear or greed right now?”
Pre-trade market mood analysis
“Before I make any crypto trades today, pull the fear and greed index for the last 14 days so I can see if sentiment has been shifting.”
Weekly sentiment trend report
“Give me the crypto fear and greed index for the past 30 days — I want to see how market sentiment has changed over the last month.”
Technical details
Endpoint
GEThttps://api.sitecheck-api.workers.dev/api/crypto/fear-greed?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, low-cost sentiment gauge for the overall crypto market without requiring exchange-specific data. Ideal for agents that need to contextualize crypto decisions with market mood, generate sentiment reports, or monitor fear/greed trends over time. The historical range (up to 30 days) makes it useful for trend analysis as well as spot checks.
Side effects
- Invalid 'days' parameter outside 1-30 range may return an error or default to 1 day
- Upstream alternative.me API downtime may cause failed or stale responses
- No authentication errors expected as this is a pay-per-call endpoint handled via x402 payment
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"today": {
"date": "2026-10-14",
"value": 62,
"classification": "Greed"
},
"source": "https://api.alternative.me/fng/",
"history": [
{
"date": "2026-10-13",
"value": 57,
"classification": "Greed"
},
{
"date": "2026-10-12",
"value": 69,
"classification": "Greed"
}
],
"checkedAt": "2026-10-14T07:00:24.033Z",
"disclaimer": "Information only, not financial advice.",
"attribution": "alternative.me"
}
}Tags
x402
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