# APEX Runner Cross-Asset Contagion Signal

> APEX Runner Cross-Asset Contagion Signal is a paid API for AI agents from apexrunner.ai, paid per call via x402, $0.007/call, status unknown (last checked 2026-09-14).

Delivers a cross-asset contagion signal indicating risk spillover or stress propagation across crypto and traditional asset classes

## Facts

- Endpoint: GET https://apexrunner.ai/signals/cross-asset-contagion
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/apex-runner-cross-asset-contagion-signal-4e06bf31
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8nGYdOTTvhg7T1dkHJhTC

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability apex-runner-cross-asset-contagion-signal-4e06bf31
```

Example prompt: Pull the current cross-asset contagion signal from APEX Runner — I want to know if there's stress spreading between crypto and other asset classes right now before I size my next trade.

## When to prefer this

Choose this endpoint when you need a pre-computed, AI-driven cross-asset contagion signal rather than computing raw correlations yourself. Ideal for trading agents that need a fast risk filter before executing trades on Kraken, Coinbase, or Hyperliquid, especially during volatile macro periods when contagion risk is elevated.

## Known failure modes

- Payment of $15 USDC not completed — 402 Payment Required response
- Signal data temporarily unavailable due to upstream market data feed outage
- Rate limiting if called too frequently in a short window
- Stale signal if underlying market data hasn't refreshed recently

## How this service works

APEX Runner: Cross Asset Contagion Signal

## Output

Returns a cross-asset contagion signal value or score indicating the degree of risk spillover or stress propagation currently occurring across asset classes, likely including signal strength, direction, and affected assets or markets.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "btc_move_4h_pct": -3.1,
  "contagion_active": true,
  "contagion_severity": "MODERATE",
  "recommended_action": "REDUCE_EXPOSURE"
 },
 "predictions": "object — keyed by coin (ETH/SOL/AVAX), each with predicted_move_pct, lag_minutes, confidence, historical_correlation",
 "btc_move_1h_pct": "float — BTC price change % over last 1 hour",
 "btc_move_4h_pct": "float — BTC price change % over last 4 hours",
 "contagion_active": "boolean — true when abs(4h move) >= 1.5%",
 "data_points_used": "integer — HL grid fills analyzed for correlation",
 "contagion_severity": "string — LOW / MODERATE / HIGH / EXTREME",
 "recommended_action": "string — REDUCE_EXPOSURE / HEDGE_ALTS / SCALE_IN / MONITOR"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apex-runner-cross-asset-contagion-signal-4e06bf31/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apexrunner.ai](https://www.zero.xyz/host/apexrunner.ai/llms.txt)