{"uid":"cap_idzsRp5X-vQtXenoWp4Oy","slug":"crypto-fear-greed-index-via-x402-bed4b993","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/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_tQqn9aqzoMk1e7ilZXUg5","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 Crypto Fear & Greed index value, zone, trend, historical averages, and momentum signals — paid per-call via USDC on Base with no API key required.","exampleAgentPrompt":"What's the current crypto fear and greed index — give me today's value and zone, plus the 7-day history so I can see the trend?","exampleUseCases":[{"title":"Pre-trade sentiment check","prompt":"Before I execute my ETH buy order, can you pull the crypto fear and greed index and tell me if we're in fear territory and how that compares to the 30-day average?"},{"title":"Daily market mood briefing","prompt":"Every morning give me the crypto fear and greed index — today's score, whether it's fear or greed, and the 7-day trend so I know how sentiment has been moving."},{"title":"Contrarian entry signal","prompt":"Check the fear and greed index right now and flag if we've been in 'fear' zone for 5 or more consecutive days — I want to know if there's a contrarian buying streak building."}],"resultDescription":"Returns a JSON object with: current index value (0-100), zone label (e.g. 'Fear'), trend direction, signal (NEUTRAL/BUY/SELL), 1d/7d/30d changes, 7-day and 30-day averages, 30-day min and max, streak days in current zone, an array of historical data points (up to 30), a reasons array explaining the signal, and the data source URL and last-updated timestamp.","failureModes":["Payment failure if agent wallet has insufficient USDC on Base — endpoint requires x402 micropayment before data is returned","days parameter out of range (must be 0-30) returns a validation error","Upstream data source (alternative.me) unavailability may cause stale or error responses","Network timeout on the Cloudflare Worker edge node"],"whenToPreferThis":"Prefer this endpoint when your AI agent needs real-time crypto market sentiment data without managing API keys or subscriptions — ideal for trading bots, onchain agents, and DeFi automation that already handle x402 USDC micropayments on Base. Choose this over free alternatives when you need structured trend, streak, and historical context in a single call, or when building fully autonomous agents that pay for data programmatically per call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:42:25.848Z","isFirstParty":false,"canonicalSlug":"crypto-fear-greed-index-via-x402-d035b008"}