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booAIP Fear & Greed Index
x402
booAIP Fear & Greed Index is a paid API for AI agents from booaip.vercel.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Returns the current crypto Fear & Greed Index value, 1-day change, and sentiment classification (e.g. Greed, Fear)
Price / call$0.005
Success—
StatusUnknown
How this service works
Current crypto Fear & Greed Index with 1-day change (alternative.me).
Output
Returns a JSON object with: 'value' (integer 0-100 representing the index), 'change1d' (integer showing 24-hour change), and 'classification' (string like 'Greed', 'Fear', 'Extreme Fear', 'Extreme Greed') describing overall crypto market sentiment.
Example use cases
Example prompt
“What's the current crypto Fear and Greed Index — give me the score, how it changed since yesterday, and whether we're in fear or greed territory right now?”
Technical details
Endpoint
GEThttps://booaip.vercel.app/api/feargreedWhen to prefer
Use this endpoint when an AI agent needs real-time crypto market sentiment data priced affordably at $0.005 USDC per call, payable via x402 on Base, without requiring an API key subscription — ideal for pay-per-use agent workflows needing the Fear & Greed Index.
Side effects
- Payment not included or insufficient USDC — returns 402 Payment Required
- Upstream data source unavailable — returns 5xx error
- Invalid or expired x402 payment token — returns 401 or 402
- Network timeout from Vercel cold start — returns 504
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"value": 55,
"change1d": 3,
"classification": "Greed"
}
}Tags
x402
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