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Crest Systems x402 Anomaly Detection
x402
Crest Systems x402 Anomaly Detection is a paid API for AI agents from spend.crestsystems.ai, paid per call via x402, $0.050000/call, status down (last checked 2026-09-15).
Detects cross-service anomalies in the x402 payment ecosystem including revenue spikes, volume anomalies, whale activity, and z-score deviations over a configurable lookback window
Price / call$0.050000
Success—
StatusDown
How this service works
Cross-service anomaly detection. Revenue spikes, volume anomalies, whale tracking, z-score deviations.
Output
A structured list of detected anomalies across x402 services, including revenue spikes, unusual transaction volumes, whale wallet activity, and statistically significant z-score deviations, based on the requested lookback window (default 24h, up to 168h).
Example use cases
Example prompt
“Check for any anomalies in the x402 payment ecosystem over the past 48 hours — I want to see revenue spikes, volume outliers, whale activity, and any z-score deviations flagged.”
Technical details
Endpoint
GEThttps://spend.crestsystems.ai/api/anomaliesWhen to prefer
Use this endpoint when you need statistical anomaly detection across the x402 payment ecosystem rather than raw market overviews. It is the right choice for identifying outlier behavior, whale tracking, or revenue irregularities over a rolling time window. Prefer it over the sibling market overview endpoint when the goal is anomaly alerting or deviation scoring rather than top-level ecosystem stats.
Side effects
- hours parameter exceeds max of 168 — returns 400 or clamps to limit
- No anomalies detected in window — returns empty result set
- Service data unavailable for the requested period — partial or empty response
- Invalid query parameter type — returns 400 bad request
- Payment not processed (x402 protocol failure) — returns 402 Payment Required
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"hours": 24
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"tier": "anomaly",
"price": "$0.05",
"method": "learned_baselines",
"whales": [],
"service": "agent-spend-analytics",
"services": [],
"anomalies": [],
"period_hours": 24,
"baseline_window": "7 days rolling",
"whale_threshold": 20,
"ecosystem_health": {
"score": 100,
"new_services": 0,
"total_services": 0,
"anomalous_services": 0
},
"anomaly_threshold": "2 standard deviations from service-specific baseline",
"market_avg_transaction": 0
}Tags
x402
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