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Fear & Greed Index Lookup
x402
Fear & Greed Index Lookup is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0005/call, status unknown (last checked 2026-10-15).
Returns the current Crypto Fear & Greed Index score and sentiment classification for the market.
Price / call$0.0005
Success—
StatusUnknown
How this service works
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Output
Returns a numeric Fear & Greed Index score (typically 0–100) along with a sentiment label such as 'Extreme Fear', 'Fear', 'Neutral', 'Greed', or 'Extreme Greed', reflecting current crypto market investor sentiment.
Example use cases
Morning crypto sentiment briefing
“Before I check my portfolio, can you pull the current Fear & Greed Index so I know whether the market is in extreme fear or greed today?”
Automated trading signal check
“I need to know if the Fear & Greed Index is currently below 25 (extreme fear) before deciding whether to buy into Bitcoin — can you check that for me?”
Market sentiment newsletter insert
“For my weekly crypto newsletter I'm writing today, can you grab the live Fear & Greed Index number and sentiment label so I can include it?”
Technical details
Endpoint
POSThttps://api.fastapi.online/fear-greed?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call crypto market sentiment check without signing up for a data provider account. It is ideal for agents that occasionally need the Fear & Greed Index without committing to a subscription, and for crypto-native workflows that can pay in USDC via x402.
Side effects
- Payment not processed — 402 response if USDC payment header is missing or insufficient
- Empty or malformed POST body may return a validation error
- Upstream data source unavailable — index may be stale or endpoint may return 5xx
- Network timeout if self-hosted inference server is under load
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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