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x402 Fear & Greed Index API
x402
x402 Fear & Greed Index API is a paid API for AI agents from x402-api-production-bd43.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Returns the current and historical Crypto Fear & Greed Index values, including sentiment classification, over a configurable number of days
Price / call$0.01
Success—
StatusUnknown
How this service works
Paid API endpoints for prices, weather, FX, news, gas, dominance, fear/greed, ATH, and more
Output
Returns an array of daily Fear & Greed Index entries, each containing a numeric score (0–100), a sentiment label (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), and the corresponding date, covering the requested number of historical days up to today.
Example use cases
Daily crypto sentiment check
“What's today's Fear and Greed Index for crypto — is the market in fear or greed right now?”
Contrarian buy signal research
“Pull the Fear and Greed Index for the last 30 days so I can see if the market has been in extreme fear recently — I'm looking for a potential buy opportunity.”
Automated sentiment dashboard
“Get me the Fear and Greed Index readings for the past 7 days so I can track how crypto market sentiment has been shifting this week.”
Technical details
Endpoint
GEThttps://x402-api-production-bd43.up.railway.app/fear-greed?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time or recent historical Crypto Fear & Greed Index data with a per-call micropayment model via x402/USDC, especially in agentic workflows where pay-per-use is preferred over subscription APIs. Ideal for crypto trading bots, sentiment dashboards, or any agent that needs to factor market psychology into decisions.
Side effects
- Invalid or non-integer value for 'limit' parameter returns a 400 error
- Payment not included or insufficient USDC triggers a 402 Payment Required response
- Upstream data source unavailable may return 503 or stale data
- Requesting more days than available historical data may return a truncated result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Days of history (default: 7) |
Tags
x402
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