{"uid":"cap_lKAy0c0CtgpdtX7amg-bx","slug":"crypto-fear-greed-index-api-e34703ac","name":"Crypto Fear & Greed Index API","description":"Crypto Fear & Greed Index: current and previous value with classification, plus recent history. A contrarian input — extreme fear has historically marked accumulation zones and extreme greed distribution zones — but it is a filter, never a trigger on its own. Pair it with funding to separate real capitulation from a crowded short.","url":"https://asistent-crypto.vercel.app/api/x402/data/fear-greed","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"required":[],"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"pathParams":{"type":"object"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"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_igRw5tlWKIq987G77tnPG","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 previous Crypto Fear & Greed Index values with sentiment classifications plus recent historical readings for contrarian market analysis.","exampleAgentPrompt":"What's the current crypto fear and greed index — is the market in extreme fear, neutral, or extreme greed right now, and what has it been over the past few days?","exampleUseCases":[{"title":"Pre-trade sentiment check","prompt":"Before I put more money into Bitcoin, tell me what the fear and greed index is right now and whether we're in a historically good accumulation zone or a risky distribution area."},{"title":"Daily crypto market briefing","prompt":"Give me today's crypto sentiment summary — what's the fear and greed index reading, how does it compare to yesterday, and has it been trending toward more fear or more greed this week?"},{"title":"Contrarian entry signal filter","prompt":"I'm looking at a potential long entry on ETH — pull the fear and greed index and tell me if we're close to extreme fear territory that might confirm a contrarian buy setup."}],"resultDescription":"Returns the current Crypto Fear & Greed Index numeric value (0–100) with its sentiment classification (e.g. Extreme Fear, Fear, Neutral, Greed, Extreme Greed), the previous period's value and classification for comparison, and a recent historical series of index readings to identify trends.","failureModes":["Upstream data provider outage causing stale or unavailable index data","Payment failure or insufficient USDC balance preventing API access","Network timeout on the Vercel edge function","Index value temporarily unavailable during data refresh windows"],"whenToPreferThis":"Choose this endpoint when you need a fast, pay-per-call sentiment gauge with no API key or account setup. It is ideal for contrarian analysis workflows — particularly when combined with funding rate data to distinguish genuine capitulation from crowded short scenarios. Prefer this over rolling your own sentiment aggregator when you need a well-known standardized index value with historical context in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:46:58.334Z","isFirstParty":false}