{"uid":"cap_oyD9FLIl6M1WAQ6ETLD8X","slug":"apex-runner-cross-exchange-spread-signal-1f12d898","name":"APEX Runner Cross Exchange Spread Signal","description":"APEX Runner: Cross Exchange Spread Signal","url":"https://apexrunner.ai/signals/cross-exchange-spread","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","pairs":"object — keyed by asset (BTC/ETH), each with direction, gross/net spread %, kr_mid, hl_mid, arb_active bool, spread_vs_threshold","example":{"pairs":{"BTC":{"asset":"BTC","hl_mid":63762.5,"kr_mid":63695.45,"direction":"kr_buy_hl_sell","arb_active":false,"net_spread_pct":-0.2,"gross_spread_pct":0.11,"spread_vs_threshold":-0.55},"ETH":{"asset":"ETH","hl_mid":1681.45,"kr_mid":1678.8,"direction":"kr_buy_hl_sell","arb_active":false,"net_spread_pct":-0.15,"gross_spread_pct":0.16,"spread_vs_threshold":-0.5}},"cached_at":"2026-06-13T12:00:00+00:00","active_arbs":0,"interpretation":"No arb opportunities above 0.35% — best spread: ETH at -0.150%","arb_threshold_pct":0.35,"best_spread_asset":"BTC","best_net_spread_pct":-0.15},"cached_at":"ISO8601 timestamp","active_arbs":"int — count of pairs above threshold","interpretation":"string — plain-English arb summary","arb_threshold_pct":"float — arb threshold (0.35%)","best_spread_asset":"string — asset with highest net spread","best_net_spread_pct":"float — best net spread %"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.007","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.007/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2yrOVJMK8x13ccdpVPGcC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.007","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a real-time cross-exchange spread signal indicating arbitrage or price divergence opportunities across crypto trading venues","exampleAgentPrompt":"What's the current cross-exchange spread signal for BTC/USDT right now — is there a meaningful arbitrage opportunity between major exchanges?","exampleUseCases":null,"resultDescription":"A structured signal object indicating the magnitude and direction of price spread across exchanges, including signal strength or score that traders can use to identify arbitrage or divergence opportunities.","failureModes":["Invalid or unsupported trading pair returns error","Payment of $3 USDC not fulfilled results in 402 Payment Required","Exchange data feed temporarily unavailable returns service error","Rate limiting if called too frequently","No significant spread detected may return null or zero signal"],"whenToPreferThis":"Use this endpoint when you need a quantitative, pre-computed signal for cross-exchange price spreads rather than raw order book data. Ideal for algorithmic trading agents that want a ready-to-use signal without building their own spread detection logic. Choose this over raw exchange APIs when you want a normalized, comparable signal across multiple venues.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:54:54.290Z","isFirstParty":false}