{"uid":"cap_DTCPAMR6HaQNukcIzMMIW","slug":"crypto-fear-greed-index-api-71fbb0e5","name":"Crypto Fear & Greed Index API","description":"Crypto Fear & Greed index: current value and classification plus 7-day history. Always-on, self-healing, verified onchain settlement. Source: Alternative.me.","url":"https://srv1553682.hstgr.cloud/fng/api/fear-greed","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"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"now":{"type":"object","properties":{"value":{"type":"integer","maximum":100,"minimum":0},"timestamp":{"type":"integer"},"classification":{"type":"string"}}},"history":{"type":"array"},"attribution":{"type":"string"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0021","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":"$0.0021/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0021","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0021","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_a0QPtNqHkS9a_ck4rPiZN","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0021","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 value, classification, and 7-day historical data sourced from Alternative.me","exampleAgentPrompt":"What's the current Crypto Fear & Greed index score and classification right now, and how has it trended over the past 7 days?","exampleUseCases":[{"title":"Daily crypto trading signal check","prompt":"Before I make any trades today, can you pull the current Crypto Fear & Greed index value and tell me whether the market is in fear, greed, or neutral territory?"},{"title":"Weekly sentiment trend review","prompt":"Show me the Crypto Fear & Greed index for the last 7 days — I want to see if market sentiment has been improving or deteriorating this week."},{"title":"Automated market brief enrichment","prompt":"I'm building a morning crypto briefing — grab the current Fear & Greed index score and its classification so I can include it alongside price data."}],"resultDescription":"A JSON object containing: the current Fear & Greed index value (integer 0-100), its classification label (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), a Unix timestamp, an array of the past 7 days of historical index entries (each with value, timestamp, classification), and an attribution string crediting Alternative.me.","failureModes":["Upstream Alternative.me API unavailability causing stale or missing data","Network timeout from the hosting server","Payment failure due to insufficient USDC balance for x402 microtransaction","Rate limiting if called excessively in short intervals"],"whenToPreferThis":"Choose this endpoint when you need a simple, low-cost, pay-per-call read of the Crypto Fear & Greed index without setting up your own Alternative.me integration. It is ideal for agents that need real-time crypto sentiment data infrequently and want verifiable on-chain settlement via x402. Prefer the sibling composite market brief endpoint if you also need BTC/ETH spot prices and funding rates in one call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:33:00.944Z","isFirstParty":false}