# APEX Runner Regime Transition Probability Signal

> APEX Runner Regime Transition Probability 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).

Returns a probabilistic signal indicating the likelihood of a cryptocurrency market regime transition (e.g., bull-to-bear or bear-to-bull shift)

## Facts

- Endpoint: GET https://apexrunner.ai/signals/regime-transition-probability
- 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-regime-transition-probability-signal-d74e9858
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xpXe3cpxhtINr5cqQ4U3d

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-regime-transition-probability-signal-d74e9858
```

Example prompt: What's the current regime transition probability for crypto right now — is the market likely to shift regimes soon, and in which direction?

## When to prefer this

Use this endpoint when an AI trading agent or quant system needs a real-time, model-derived probability estimate for crypto market regime changes — particularly when integrating with APEX Runner's broader autonomous trading stack on Kraken, Coinbase, or Hyperliquid, and when you need a single scalar signal rather than raw price data or order book analysis.

## Known failure modes

- Invalid or unsupported asset identifier returns 4xx error
- Stale market data may reduce signal reliability
- Payment failure (insufficient USDC or x402 auth error) blocks access
- Rate limiting if called too frequently
- Signal may be unavailable during exchange downtime or data feed gaps

## How this service works

APEX Runner: Regime Transition Probability Signal

## Output

A probabilistic signal score (likely 0-1) indicating the likelihood of a market regime transition, including current regime classification (e.g., bull/bear/sideways), direction of potential transition, and a confidence score or supporting context for use in trading decisions.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "signal": "string — PRE_TREND / PRE_CRISIS / STABLE / UNCERTAIN",
 "example": {
  "signal": "PRE_TREND",
  "confidence": "MEDIUM",
  "current_regime": "RANGING",
  "most_likely_next": "TRENDING",
  "transition_probability": 0.55,
  "transition_probabilities": {
   "CHOPPY": 0.08,
   "CRISIS": 0.12,
   "RANGING": 0.45,
   "TRENDING": 0.35
  }
 },
 "confidence": "string — LOW / MEDIUM / HIGH based on data points available",
 "data_points": "integer — number of real APEX trade lessons used in matrix",
 "key_factors": "array — top 3 technical factors influencing the prediction",
 "current_regime": "string — current BTC market regime",
 "most_likely_next": "string — most probable next regime if transition occurs",
 "transition_probability": "float — overall probability of ANY regime change (0-1)",
 "transition_probabilities": "object — probability for each regime (RANGING/TRENDING/CRISIS/CHOPPY) summing to 1.0"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apex-runner-regime-transition-probability-signal-d74e9858/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)