{"uid":"cap_ZPOFXsgdolVEe6CPi-oDV","slug":"hergert-synthora-fear-greed-index-2f66df24","name":"HERGERT SYNTHORA Fear & Greed Index","description":"SYNTHORA fear-greed: indice de miedo/codicia con la VARIACION frente a ayer y el cruce de banda, no solo el valor. Fuente: alternative.me, fechada y con hash.","url":"https://api.hergertsynthora.com/v1/fear-greed","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"string","description":"SYNTHORA fear-greed: indice de miedo/codicia con la VARIACION frente a ayer y el cruce de banda, no solo el valor. Fuente: alternative.me, fechada y con hash."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_E9BYkWbWKgflylDa-0Pou","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","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 from alternative.me, including today's value, the delta versus yesterday, and a band-crossing signal.","exampleAgentPrompt":"What's the crypto Fear & Greed Index right now, including how much it changed since yesterday and whether it crossed any band threshold — I want the dated, hash-verified reading from SYNTHORA?","exampleUseCases":[{"title":"Daily crypto sentiment check","prompt":"Pull today's Fear & Greed Index for me and tell me whether it went up or down from yesterday and if it crossed into a new sentiment band."},{"title":"Trading signal pre-check","prompt":"Before I place my BTC order, can you grab the latest Fear & Greed reading from SYNTHORA and flag if the index just crossed a band — I want the delta vs yesterday too."},{"title":"Verifiable sentiment audit log","prompt":"Get me a dated, hash-verified Fear & Greed Index snapshot from SYNTHORA for my records — I need the current value, yesterday's change, and the band-crossing status."}],"resultDescription":"A JSON object with ok:true, the niche identifier 'fear_greed', a result object containing the current Fear & Greed index value, the day-over-day change delta, a band-crossing indicator, a timestamp, and a data hash for verification, plus a payment receipt object confirming the x402 microtransaction.","failureModes":["Upstream alternative.me data unavailable — result may be stale or empty","Malformed input string causes request rejection","Payment not processed — x402 receipt missing, request not fulfilled","Rate limit or infrastructure downtime returning 5xx errors","Data hash mismatch indicating data integrity issue"],"whenToPreferThis":"Choose this endpoint when you need a verifiable, dated, and hash-stamped Fear & Greed Index reading that includes not just the raw value but also the day-over-day delta and a band-crossing signal — useful for trading agents needing auditable sentiment data rather than a bare index number from a generic source.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:44:03.231Z","isFirstParty":false}