{"uid":"cap_FZWTOh6GA7ddnrVpfa-Iv","slug":"crypto-fear-greed-index-via-x402-ab72cf7c","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/api/alternative/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_PMnr7Q4mT5A9K--pl_y4N","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 Alternative.me Crypto Fear & Greed Index value, trend, signal, and rolling statistics, paid per-call with USDC on Base via x402.","exampleAgentPrompt":"What's the current crypto fear and greed index, and how has sentiment trended over the last 7 days — is the market leaning toward fear or greed right now?","exampleUseCases":[{"title":"Pre-trade sentiment check for DeFi bot","prompt":"Before executing this swap, check the crypto fear and greed index — if the market is in extreme fear (below 25), hold off and just report back the current value and 7-day trend."},{"title":"Daily market mood briefing","prompt":"Give me a quick daily briefing on crypto market sentiment using the fear and greed index, including today's value, whether it's rising or falling, and how it compares to the 30-day average."},{"title":"Contrarian entry signal detection","prompt":"Has the crypto fear and greed index been below 30 for 5 or more consecutive days? Fetch the index with 30 days of history so I can check for a prolonged fear streak that might signal a contrarian buy opportunity."}],"resultDescription":"Returns a JSON object with the current fear/greed numeric value (0–100), zone label (e.g. 'Fear'), trend direction, trading signal (NEUTRAL/BUY/SELL), 1d/7d/30d changes, 7d and 30d rolling averages, 30d min/max, a streak count of consecutive days in the current zone, the previous day's reading, human-readable reasons, and an array of historical daily data points up to 30 days.","failureModes":["Payment failure if wallet has insufficient USDC on Base (x402 payment rejected)","Invalid 'days' parameter outside 0–30 range returns validation error","Upstream Alternative.me API unavailability may return stale or error response","Network timeout on the Cloudflare Worker edge"],"whenToPreferThis":"Use this endpoint when an AI trading or onchain agent needs a no-API-key, pay-per-use sentiment signal from the widely-cited Alternative.me Fear & Greed Index. Ideal for agents that want micropayment-native access (USDC on Base via x402) without managing API subscriptions, rate limits, or credential rotation. Prefer this over scraping Alternative.me directly or using subscription APIs when cost-per-call economics and keyless operation are priorities.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T18:32:56.509Z","isFirstParty":false,"canonicalSlug":"crypto-fear-greed-index-via-x402-d035b008"}