{"uid":"cap__b70qpjDQCU3J0rkxgzxW","slug":"crypto-fear-greed-index-api-9ecc67cb","name":"Crypto Fear & Greed Index API","description":"Crypto Fear & Greed index, latest + history (alternative.me). 0.01 USDC/call on Base.","url":"https://task-radar-x402.vercel.app/api/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":{"const":"http"},"method":{"const":"GET"},"queryParams":{"type":"object","properties":{"days":{"type":"string","description":"History days 1-30 (default 7)"}}}}}}},"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_Nwsb3eDaveMBs0z1HAS0Y","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 current and historical Crypto Fear & Greed index values sourced from alternative.me, payable per-call in USDC on Base.","exampleAgentPrompt":"What's the current Crypto Fear & Greed index, and can you show me how it's trended over the last 14 days?","exampleUseCases":[{"title":"Daily trading sentiment check","prompt":"What's today's Crypto Fear & Greed index reading — is the market in fear or greed right now?"},{"title":"30-day sentiment trend analysis","prompt":"Pull the Crypto Fear & Greed index history for the last 30 days so I can see how market sentiment has shifted over the past month."},{"title":"Automated DCA trigger monitor","prompt":"Check the current Fear & Greed index — I want to know if it's below 25 (extreme fear) so I can decide whether to increase my crypto buy today."}],"resultDescription":"Returns the latest Crypto Fear & Greed index score (0–100) with a sentiment label (e.g. 'Extreme Fear', 'Greed'), plus a time series of historical daily readings for the requested number of days, as provided by alternative.me.","failureModes":["Invalid or out-of-range 'days' parameter (outside 1–30) may return an error or default behavior","Upstream alternative.me API unavailability causing fetch failure","Payment failure on Base network blocking the request","Rate limiting or quota issues on the underlying provider"],"whenToPreferThis":"Use this endpoint when you need the well-known alternative.me Crypto Fear & Greed index — either the current reading or a short historical series (up to 30 days) — for sentiment-aware trading logic, market monitoring, or enriching crypto analysis workflows. Prefer it over manual scraping of alternative.me or general web-fetch endpoints because it delivers clean, structured index data for a flat $0.01 USDC per call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:40:13.243Z","isFirstParty":false,"canonicalSlug":"crypto-fear-greed-index-api-9ecc67cb"}