{"uid":"cap_h_-jWETa3CnfPWtwe_e6_","slug":"x402-fear-greed-index-api-f37cfbda","name":"x402 Fear & Greed Index API","description":"Paid API endpoints for prices, weather, FX, news, gas, dominance, fear/greed, ATH, and more","url":"https://x402-api-production-bd43.up.railway.app/fear-greed?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"limit":{"type":"integer","description":"Days of history (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_vHw4JcMPwblY2_CodWxJ9","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, including sentiment classification, over a configurable number of days","exampleAgentPrompt":"What's the current crypto Fear and Greed Index, and can you show me how it's trended over the last 14 days?","exampleUseCases":[{"title":"Daily crypto sentiment check","prompt":"What's today's Fear and Greed Index for crypto — is the market in fear or greed right now?"},{"title":"Contrarian buy signal research","prompt":"Pull the Fear and Greed Index for the last 30 days so I can see if the market has been in extreme fear recently — I'm looking for a potential buy opportunity."},{"title":"Automated sentiment dashboard","prompt":"Get me the Fear and Greed Index readings for the past 7 days so I can track how crypto market sentiment has been shifting this week."}],"resultDescription":"Returns an array of daily Fear & Greed Index entries, each containing a numeric score (0–100), a sentiment label (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), and the corresponding date, covering the requested number of historical days up to today.","failureModes":["Invalid or non-integer value for 'limit' parameter returns a 400 error","Payment not included or insufficient USDC triggers a 402 Payment Required response","Upstream data source unavailable may return 503 or stale data","Requesting more days than available historical data may return a truncated result"],"whenToPreferThis":"Choose this endpoint when you need real-time or recent historical Crypto Fear & Greed Index data with a per-call micropayment model via x402/USDC, especially in agentic workflows where pay-per-use is preferred over subscription APIs. Ideal for crypto trading bots, sentiment dashboards, or any agent that needs to factor market psychology into decisions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:33:21.057Z","isFirstParty":false,"canonicalSlug":"x402-fear-greed-index-api-f37cfbda"}