{"uid":"cap_7_oTgZ7EtrMc6tuxGPQ5m","slug":"crypto-fear-greed-index-8a913f2e","name":"Crypto Fear & Greed Index","description":"The crypto Fear & Greed Index (alternative.me): 0 = extreme fear, 100 = extreme greed, from volatility, momentum, volume, social and dominance — plus the day-over-day change and recent history. The one-number market-mood read an agent uses to size risk. Pass days= for history (up to 30). A sentiment gauge, not a signal. Not financial advice.","url":"https://402.com.tr/api/x402/fear-greed?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object"},"queryParams":{"type":"object","required":[],"properties":{"days":{"type":"string","description":"History days (default 1, max 30)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZgyO82CjqFGGTHkD0BNRS","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current Crypto Fear & Greed Index score (0–100) with day-over-day change and optional historical data up to 30 days","exampleAgentPrompt":"What's the current crypto Fear & Greed Index, and can you show me how it's changed over the last 7 days?","exampleUseCases":[{"title":"Daily crypto mood check","prompt":"What's the crypto Fear & Greed Index right now — is the market fearful or greedy today?"},{"title":"30-day sentiment trend review","prompt":"Pull the crypto Fear & Greed Index for the past 30 days so I can see how market sentiment has trended this month."},{"title":"Risk-sizing decision support","prompt":"Before I rebalance my crypto portfolio, grab the Fear & Greed Index for the last 14 days so I can see if we're in an extreme zone."}],"resultDescription":"Returns the current Fear & Greed Index score (0 = extreme fear, 100 = extreme greed), the named sentiment label (e.g. 'Fear', 'Greed', 'Neutral'), the day-over-day change, and an array of historical data points if days > 1 was requested — sourced from alternative.me and derived from volatility, momentum, volume, social signals, and BTC dominance.","failureModes":["days parameter exceeds 30 — capped or returns error","Network or upstream alternative.me outage returns unavailable data","Invalid days value (non-numeric) causes a 400-level error","Payment not completed results in 402 Payment Required response"],"whenToPreferThis":"Choose this endpoint when you need a single, standardized crypto market sentiment score without building your own aggregation logic. It is ideal for agents that need to contextualize market conditions before executing trades, rebalancing portfolios, or generating market commentary. Prefer it over raw price feeds when the goal is mood or risk-level classification rather than exact price data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T18:51:51.499Z","isFirstParty":false,"canonicalSlug":"crypto-fear-greed-index-8a913f2e"}