{"uid":"cap_n6UQnDSRP_u4QV5gPOAAa","slug":"crypto-fear-greed-index-api-b513e22e","name":"Crypto Fear & Greed Index API","description":"Live Crypto Fear & Greed Index (0-100) with classification and AI interpretation. Contrarian signal for trading agents.","url":"https://losbeto-production-dd7c.up.railway.app/fear-greed","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","properties":{"queryParams":{"type":"object","properties":{"format":{"type":"string","description":"Response format (json)"}}}}},"output":{"type":"object","properties":{"example":{"type":"object","description":"Is the crowd greedy or fearful right now? The Fear & Greed Index (0-100) at this exact instant, with classification — a point-in-time reading your model's training data cannot contain. [Commodity wrapper over a public source (https://api.alternative.me/fng/ (public, free)) — buy it only for the convenience of one schema and one payment rail. The differentiated product here is the Brazilian point-in-time archive: /br-asof.]"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_fIAfmOcnolmXr8dgOP9NR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the live Crypto Fear & Greed Index (0-100) with market sentiment classification and AI-generated contrarian trading interpretation","exampleAgentPrompt":"What's the current crypto Fear & Greed Index score right now, and what does it mean for a contrarian trading strategy?","exampleUseCases":null,"resultDescription":"A JSON object containing the live Fear & Greed Index score (0-100), a sentiment classification label (e.g. 'Extreme Fear', 'Greed', 'Extreme Greed'), and an AI-generated interpretation providing contrarian trading context based on the current index value.","failureModes":["Upstream data source unavailable — returns 503 or error body","Rate limiting or payment verification failure — returns 402 or 429","Invalid format query parameter — may return 400 or default to JSON","Service cold-start on Railway deployment — elevated latency or timeout"],"whenToPreferThis":"Choose this endpoint when you need a real-time, single-call snapshot of the crypto market's emotional state with built-in AI interpretation for contrarian trading logic. Prefer this over raw index feeds when you want the classification label and a ready-to-use trading signal narrative without post-processing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:32:30.289Z","isFirstParty":false}