{"uid":"cap_Boeyc8EBGiIrRgCHIUurn","slug":"crypto-fear-greed-index-via-x402-99f38bd5","name":"Crypto Fear & Greed Index via x402","description":"Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.","url":"https://kr-x402-mvp.kgy5612.workers.dev/v1/crypto/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"},"queryParams":{"type":"object","properties":{"days":{"type":"integer","maximum":30,"minimum":0,"examples":[7],"description":"History points to return (default 7, 0 = none)"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"zone":"fear","label":"Fear","trend":"falling","value":34,"avg_7d":39.4,"signal":"NEUTRAL","source":"https://alternative.me/crypto/fear-and-greed-index/","avg_30d":47.1,"history":[{"date":"2026-10-30","label":"Fear","value":34}],"max_30d":66,"min_30d":28,"reasons":["34 Fear, -12 vs 7d ago","below 30d avg 47.1"],"previous":{"label":"Fear","value":38},"change_1d":-4,"change_7d":-12,"change_30d":-20,"updated_at":"2026-10-30T00:00:00Z","streak_days":5}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_sb0zSPAVg4JLgez-QbapG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","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 with trend, zone classification, streak, and trading signal, paid per-call via x402 USDC micropayment.","exampleAgentPrompt":"What's the current crypto fear and greed index, and show me how the sentiment has trended over the last 7 days?","exampleUseCases":[{"title":"Sentiment check before trade execution","prompt":"Before I execute this BTC buy, what's the current fear and greed index and has the sentiment been falling or recovering over the past 7 days?"},{"title":"30-day market mood dashboard","prompt":"Pull me the crypto fear and greed index with the full 30-day history — I want to see the min, max, averages, and how today compares."},{"title":"Automated sentiment alert condition","prompt":"Check the current crypto fear and greed zone and tell me if we're in extreme fear territory, and how many consecutive days we've been in this streak."}],"resultDescription":"Returns a JSON object with the current fear/greed value (0–100), zone (fear/neutral/greed), label, trend direction, trading signal, previous day's value, 1d/7d/30d changes, 7d and 30d averages, min/max over 30 days, streak duration in days, a list of human-readable reasons, a history array of daily data points up to 30 days, source URL, and last updated timestamp.","failureModes":["Payment not provided or insufficient USDC balance returns 402 Payment Required","Invalid `days` value outside 0–30 range returns a validation error","Upstream data source (alternative.me) unavailable may return stale or error response","Network timeout on Cloudflare worker edge node"],"whenToPreferThis":"Choose this endpoint when an AI trading agent or onchain bot needs real-time crypto market sentiment context without a registered API key, paying only $0.001 USDC per call via x402 micropayment. Ideal for agents that need lightweight sentiment enrichment alongside price or onchain data from the same provider's suite. Prefer over free public APIs when operating in a pay-per-use agent economy where no pre-registration is acceptable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:40:32.977Z","isFirstParty":false,"canonicalSlug":"crypto-fear-greed-index-via-x402-d035b008"}