{"uid":"cap_dmcTLUcRAroyBtD3PyrwC","slug":"synthora-macro-surprise-index-8b85bfa1","name":"SYNTHORA Macro Surprise Index","description":"SYNTHORA macro surprise index: z-score of the latest change vs the trailing 12-change distribution for official ECB series (HICP inflation, MRR policy rate, 10Y yield). Flags strong/moderate surprises the moment official data prints. Partial degradation, Ed25519-signed. First 3 calls FREE per wallet via X-WALLET header. 0.05 USDC via x402 on Base.","url":"https://api.hergertsynthora.com/v1/macro-surprise","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"asset":{"type":"string","description":"asset symbol e.g. BTC/ETH"}}},"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_o-XbFgLDIhlZctCGe4oxU","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":"Computes a z-score surprise index for the latest ECB macro data prints (HICP inflation, MRR policy rate, 10Y yield) relative to the trailing 12-change distribution, flagging strong or moderate surprises in real time.","exampleAgentPrompt":"Can you check the SYNTHORA macro surprise index for ETH right now and tell me if the latest ECB data print — inflation, policy rate, or 10Y yield — triggered a strong or moderate surprise signal?","exampleUseCases":[{"title":"ECB rate decision surprise alert","prompt":"I just heard the ECB made a policy rate move — can you pull the macro surprise z-score for BTC and tell me if that rate change counts as a strong or moderate surprise versus the last 12 moves?"},{"title":"Eurozone inflation trade signal","prompt":"The latest HICP print just dropped — run the macro surprise index and tell me if the inflation number is statistically surprising enough to trade on, and what the z-score is."},{"title":"10Y yield surprise monitoring for portfolio","prompt":"Check the SYNTHORA macro surprise index for ETH and flag whether today's ECB 10Y yield change is a strong surprise relative to historical distribution."}],"resultDescription":"Returns a z-score quantifying how surprising the latest ECB data change is relative to the trailing 12-change distribution, along with a categorical flag (strong or moderate surprise) for each of the three official ECB series: HICP inflation, MRR policy rate, and 10Y yield. Response is Ed25519-signed and supports partial degradation if some series are unavailable.","failureModes":["Missing or invalid asset symbol returns an error or empty result","Partial degradation: one or more ECB series may be unavailable, returning partial data","Insufficient trailing data (fewer than 12 prior changes) may reduce z-score reliability","Payment failure via x402 if wallet balance is insufficient after 3 free calls","Invalid X-WALLET header may cause free-tier authentication failure","ECB data feed delay may cause stale z-scores during publication lag windows"],"whenToPreferThis":"Choose this endpoint when you need a real-time, statistically grounded signal for whether the latest ECB macro data release (inflation, policy rate, or 10Y yield) is surprising relative to recent history. It is purpose-built for eurozone macro surprise detection with Ed25519-signed responses for auditability. Prefer it over generic news or sentiment endpoints when you need a quantitative z-score rather than a qualitative assessment, and over Fed-focused tools (like SOFR/EFFR endpoints) when your focus is ECB/eurozone data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:49:58.306Z","isFirstParty":false}