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Crypto Fear & Greed Index via x402
x402
Crypto Fear & Greed Index via x402 is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-02).
Returns the current and historical Alternative.me Crypto Fear & Greed Index value, trend, signal, and rolling statistics, paid per-call with USDC on Base via x402.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
Returns a JSON object with the current fear/greed numeric value (0–100), zone label (e.g. 'Fear'), trend direction, trading signal (NEUTRAL/BUY/SELL), 1d/7d/30d changes, 7d and 30d rolling averages, 30d min/max, a streak count of consecutive days in the current zone, the previous day's reading, human-readable reasons, and an array of historical daily data points up to 30 days.
Example use cases
Pre-trade sentiment check for DeFi bot
“Before executing this swap, check the crypto fear and greed index — if the market is in extreme fear (below 25), hold off and just report back the current value and 7-day trend.”
Daily market mood briefing
“Give me a quick daily briefing on crypto market sentiment using the fear and greed index, including today's value, whether it's rising or falling, and how it compares to the 30-day average.”
Contrarian entry signal detection
“Has the crypto fear and greed index been below 30 for 5 or more consecutive days? Fetch the index with 30 days of history so I can check for a prolonged fear streak that might signal a contrarian buy opportunity.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/alternative/fear-greed?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI trading or onchain agent needs a no-API-key, pay-per-use sentiment signal from the widely-cited Alternative.me Fear & Greed Index. Ideal for agents that want micropayment-native access (USDC on Base via x402) without managing API subscriptions, rate limits, or credential rotation. Prefer this over scraping Alternative.me directly or using subscription APIs when cost-per-call economics and keyless operation are priorities.
Side effects
- Payment failure if wallet has insufficient USDC on Base (x402 payment rejected)
- Invalid 'days' parameter outside 0–30 range returns validation error
- Upstream Alternative.me API unavailability may return stale or error response
- Network timeout on the Cloudflare Worker edge
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"zone": "fear",
"label": "Fear",
"trend": "falling",
"value": 34,
"avg_7d": 39.4,
"signal": "NEUTRAL",
"source": "https://alternative.me/crypto/fear-and-greed-index/",
"avg_30d": 47.1,
"history": [
{
"date": "2026-10-30",
"label": "Fear",
"value": 34
}
],
"max_30d": 66,
"min_30d": 28,
"reasons": [
"34 Fear, -12 vs 7d ago",
"below 30d avg 47.1"
],
"previous": {
"label": "Fear",
"value": 38
},
"change_1d": -4,
"change_7d": -12,
"change_30d": -20,
"updated_at": "2026-10-30T00:00:00Z",
"streak_days": 5
}
}Tags
x402
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