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Crypto Fear & Greed Sentiment Index
x402
Crypto Fear & Greed Sentiment Index 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 2026-10-31).
Returns the current and historical crypto Fear & Greed Index value with trend, zone classification, and statistical summaries over up to 30 days.
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, 1-day/7-day/30-day changes, 7-day and 30-day averages, min/max over 30 days, a trading signal string, streak days in current zone, an array of historical daily readings, human-readable reasons, the previous day's reading, and an updated_at timestamp. Source is attributed to alternative.me.
Example use cases
Sentiment-gated trade decision
“Before I execute this ETH buy, check the Fear & Greed Index — if we're in extreme fear (below 25), go ahead; otherwise hold off. Show me today's value and the 7-day trend.”
Daily market briefing for trading bot
“Pull today's crypto Fear & Greed score along with the 30-day average and tell me whether sentiment is trending up or down from yesterday.”
Monthly sentiment retrospective
“Give me the full 30-day crypto Fear & Greed history so I can see how sentiment moved over the past month — I want the min, max, and average for the period.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/v1/crypto/sentiment?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your agent needs crypto market sentiment context without managing API keys — ideal for trading bots, DeFi agents, or portfolio tools that want a pay-per-call Fear & Greed signal via x402 micropayments on Base. Prefer it over free alternatives when you need historical trend data (7/30-day stats, streaks, min/max) bundled in a single call and when operating in a keyless, agent-native payment environment.
Side effects
- Upstream alternative.me API unavailable — stale or missing data returned
- days parameter out of range (>30 or <0) — validation error
- x402 payment not completed — 402 Payment Required response before data is served
- Network timeout on workers.dev edge — transient 5xx error
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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