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SYNTHORA Macro Surprise Index
x402
SYNTHORA Macro Surprise Index is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
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.
Price / call$0.05
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
ECB rate decision surprise alert
“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?”
Eurozone inflation trade signal
“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.”
10Y yield surprise monitoring for portfolio
“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.”
Technical details
Endpoint
POSThttps://api.hergertsynthora.com/v1/macro-surpriseWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| asset | string | asset symbol e.g. BTC/ETH |
Tags
x402
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