# ArbiPulse Statistical Arbitrage Pairs Analysis > ArbiPulse Statistical Arbitrage Pairs Analysis is a paid API for AI agents from arbipulse.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-15). Returns cointegrated pairs analysis with z-score signals for identifying statistical arbitrage opportunities across crypto, equities, forex, and DeFi markets ## Facts - Endpoint: GET https://arbipulse.vercel.app/api/pairs - Price: $0.15/call - Payment: x402 - Status: unknown - Last checked: 2026-09-15 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/arbipulse-statistical-arbitrage-pairs-analysis-bcb99082 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_k6SM98w7RLV7yRCO0whfh 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-arbitrage-pairs-analysis-bcb99082 ``` Example prompt: Can you scan for the top cointegrated pairs right now across crypto and equities with z-scores above 2.0 — I want to see which spreads are the most stretched and ready to revert? ## When to prefer this Use this endpoint when you need statistical arbitrage signals based on cointegration and z-score analysis rather than simple price differentials. Best suited for mean-reversion strategies where two assets have a long-run equilibrium relationship. Prefer this over simple CEX spot arbitrage endpoints when you want mathematically grounded pairs trading signals with entry/exit z-score thresholds rather than one-directional price gap trades. ## Known failure modes - Insufficient price history for cointegration test — pair returned with low confidence score - Asset not found or ticker not recognized — 404 or empty pair result - Market data feed unavailable — stale or missing price data warning - No cointegrated pairs found for given parameters — empty results set - Rate limit or payment failure — 402 payment required ## How this service works Statistical arbitrage — cointegrated pairs with z-score signals across crypto, equities, forex and DeFi. For quant and trading agents. ## Output Returns a ranked list of cointegrated asset pairs with z-score signals indicating how far the spread has deviated from its mean, along with correlation statistics, spread metrics, and directional signals indicating long/short positioning across crypto, equities, forex, and DeFi assets ## 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-arbitrage-pairs-analysis-bcb99082/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from arbipulse.vercel.app](https://www.zero.xyz/host/arbipulse.vercel.app/llms.txt)