# ArbiPulse Statistical Pairs Scanner

> ArbiPulse Statistical Pairs Scanner is a paid API for AI agents from arbipulse.theaslangroupllc.com, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Returns cointegrated asset pairs with z-score signals for statistical arbitrage across crypto, equities, forex, and DeFi

## Facts

- Endpoint: GET https://arbipulse.theaslangroupllc.com/api/pairs
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arbipulse-statistical-pairs-scanner-a4904fc7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oxAXE72VV65lbuDfPkBKK

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 arbipulse-statistical-pairs-scanner-a4904fc7
```

Example prompt: Pull me the top cointegrated pairs right now with z-scores above 2.0 — I want to see crypto and DeFi pairs flagged for mean-reversion entry signals.

## When to prefer this

Use this endpoint when a quant or trading agent needs to identify statistically cointegrated pairs and their current z-score divergence signals, particularly when scanning across multiple asset classes (crypto, equities, forex, DeFi) simultaneously. Prefer this over single-asset price feeds or generic correlation tools when the goal is mean-reversion pair selection with statistical rigor.

## Known failure modes

- Invalid asset class filter returns 400 with parameter validation error
- No pairs found for given filters returns empty result set
- Market data unavailability causes 503 service temporarily unavailable
- Rate limiting or unpaid quota returns 402 payment required
- Stale data during market outages may return degraded signal quality

## How this service works

Statistical arbitrage — cointegrated pairs with z-score signals across crypto, equities, forex and DeFi. For quant and trading agents.

## Output

A list of cointegrated asset pairs with their current z-scores, spread values, signal direction (long/short), asset class labels, and statistical metrics such as half-life and correlation coefficient to support pairs trading decisions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "asset_a": {
       "type": "string",
       "description": "first asset symbol, e.g. BTC"
      },
      "asset_b": {
       "type": "string",
       "description": "second asset symbol, e.g. ETH"
      },
      "asset_class": {
       "type": "string",
       "description": "crypto | equities | forex | defi (default: crypto)"
      },
      "lookback_days": {
       "type": "string",
       "description": "historical lookback for correlation, e.g. 30"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "errors": {
     "type": "object",
     "description": "Documented error responses, keyed by HTTP status code",
     "additionalProperties": {
      "type": "object",
      "required": [
       "description"
      ],
      "properties": {
       "example": {
        "type": "object"
       },
       "description": {
        "type": "string"
       }
      }
     }
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "risks": [
   "Correlation can break permanently (e.g. ETH merge changed dynamics)",
   "Crypto market structure shifts make historical z-scores unreliable",
   "Both legs can move adversely in a flash crash"
  ],
  "asset_a": "BTC",
  "asset_b": "ETH",
  "scan_time": "2026-06-06T12:00:00Z",
  "asset_class": "crypto",
  "trade_signal": {
   "action": "long_a_short_b",
   "rationale": "ETH/BTC at 1.8 std devs above 30d mean. If historical correlation holds, ETH likely to underperform BTC short-term.",
   "exit_condition": "ETH/BTC ratio returns to 0.052 (30d mean)",
   "entry_condition": "ETH/BTC ratio above 0.054 (current: 0.056)",
   "stop_loss_condition": "ETH/BTC ratio exceeds 0.060 (3 std devs)",
   "estimated_profit_bps": 380,
   "typical_holding_period": "3-10 days"
  },
  "size_guidance": {
   "hedge_ratio": 1,
   "dollar_neutral": true,
   "recommended_notional_per_leg": "$5,000-$50,000",
   "max_position_size_pct_of_capital": 5
  },
  "current_signal": {
   "signal_strength": "moderate",
   "spread_direction": "asset_b_premium",
   "estimated_z_score": 1.8,
   "current_relationship": "ETH is trading at a premium to its historical BTC ratio. ETH/BTC ratio elevated vs 30-day average."
  },
  "pair_statistics": {
   "historical_context": "BTC/ETH is one of the most studied crypto pairs. The ETH/BTC ratio (currently 0.052) oscillates between 0.04 and 0.07 across cycles.",
   "mean_reversion_speed": "medium (1-7d)",
   "typical_spread_behavior": "ETH typically prices at 6-8% of BTC value. Deviations >2 standard deviations historically revert within 2-7 days.",
   "cointegration_assessment": "strong",
   "estimated_correlation_30d": 0.87
  },
  "pulse_suggestions": [],
  "related_pairs_to_watch": [
   "ETH/SOL",
   "BTC/SOL",
   "WBTC/WETH on-chain spread"
  ],
  "asset_class_specific_notes": "Crypto pairs are highly correlated in bull markets but diverge on asset-specific news (ETH upgrades, BTC halving). Trade through perpetual futures for easy short access."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arbipulse-statistical-pairs-scanner-a4904fc7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from arbipulse.theaslangroupllc.com](https://www.zero.xyz/host/arbipulse.theaslangroupllc.com/llms.txt)