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PerCall Momentum Signals
x402
PerCall Momentum Signals is a paid API for AI agents from percall.kimi.pro, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Returns a cross-pair momentum score (-100 to +100) with regime label for the top 10 USDT pairs, computed from 7 days of hourly closes, including 24h/7d rate-of-change, realised volatility, and composite ranking.
Price / call$0.01
Success—
StatusUnknown
How this service works
PerCall is an x402 payment gateway selling live crypto market data to AI agents and developers. No accounts, no API keys: request, receive HTTP 402, pay in USDC on Base, get data.
Output
A JSON object containing a ranked list of up to 10 USDT trading pairs, each with: composite momentum score (-100 to +100), regime label (TRENDING_UP, TRENDING_DOWN, or RANGING), 24h and 7d rate-of-change percentages, 7-day realised volatility, and rank. Also includes metadata: lookback period, generation timestamp, and methodology description.
Example use cases
Pre-trade momentum filter for crypto agent
“Before executing any trades, check which of the top USDT pairs are currently in a TRENDING_UP regime and rank them by momentum score so I can prioritize those.”
Crypto market regime dashboard
“Pull the latest momentum signals for the top 10 USDT pairs and tell me how many are trending up, how many are trending down, and how many are ranging right now.”
Volatility-adjusted pair selection
“I want to find USDT pairs with strong 7-day momentum but low realised volatility — can you fetch the momentum signals and highlight any that are trending up with volatility below 3%?”
Technical details
Endpoint
GEThttps://percall.kimi.pro/api/x402/signals/momentumWhen to prefer
Choose this endpoint when you need a pre-computed, multi-factor momentum ranking across the top USDT pairs rather than raw price data for a single pair. It is ideal for pre-trade screening, portfolio rotation logic, or regime-aware strategies where you want a composite score blending ROC and volatility in a single call. Prefer it over raw price or order book endpoints when the agent needs to make a relative ranking decision across pairs rather than act on a single instrument.
Side effects
- Payment failure (402): x402 micropayment of $0.01 USDC not completed or invalid
- Upstream data unavailable: exchange data feed disruption may result in stale or missing signals
- Empty signals array: if fewer than 10 pairs have sufficient data for the 7-day lookback
- Rate limiting: excessive calls in a short window may be throttled
- Malformed response if internal computation fails due to insufficient historical data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"signals": [
{
"rank": 1,
"score": 62.4,
"regime": "TRENDING_UP",
"symbol": "SOLUSDT",
"roc7dPct": 11.87,
"roc24hPct": 4.21,
"volatility7dPct": 2.94
}
],
"lookback": "7d hourly closes",
"generatedAt": "2026-08-28T00:00:00.000Z",
"methodology": "score = z-scored blend of 24h ROC, 7d ROC and inverse realised volatility, rescaled to -100..100. regime: TRENDING_UP if score >= 25, TRENDING_DOWN if <= -25, else RANGING."
}
}Tags
x402
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