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SperaxOS DeFi Fear & Greed Index API
x402
SperaxOS DeFi Fear & Greed Index API is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Returns the current crypto Fear & Greed Index score and sentiment label for DeFi market intelligence
Price / call$0.001
Success—
StatusUnknown
How this service works
AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.
Output
Returns the current Fear & Greed Index value (typically 0–100) and a corresponding sentiment classification such as 'Extreme Fear', 'Fear', 'Neutral', 'Greed', or 'Extreme Greed', providing a snapshot of current DeFi/crypto market sentiment.
Example use cases
Pre-trade market sentiment check
“Before I make any DeFi trades today, can you pull the current Fear and Greed Index so I know whether the market is in extreme fear or greed?”
Daily DeFi market briefing
“Give me a quick market mood update — what's the Fear and Greed Index sitting at right now for crypto?”
Automated sentiment-based trading signal
“Check the current DeFi Fear and Greed Index and tell me the score and label so I can decide whether to buy the dip or hold off.”
Technical details
Endpoint
POSThttps://chat.sperax.io/api/x402/tools/defi-analytics/getFearGreedIndex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, real-time crypto market sentiment pulse without setting up an API key — especially when operating in a pay-per-use agent context using x402/USDC on Base. Ideal for DeFi-native workflows where wallet-based micropayments are already in use and you want AI-augmented market intelligence without a subscription.
Side effects
- Payment failure if USDC balance is insufficient or x402 payment not completed
- HTTP 402 returned if payment is not attached to the request
- Empty or malformed response body if the upstream data source is unavailable
- Rate limiting or timeout if the SperaxOS backend is overloaded
- Stale data if the index has not been recently updated by the underlying data provider
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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