{"slug":"api-seerium-xyz-v1-prediction-arb-same-outcome-spread-1edbf7","title":"Prediction market arbitrage and same-outcome spread API for Polymarket, Kalshi, ","host":"api.seerium.xyz","method":"GET","resource":"https://api.seerium.xyz/v1/prediction/arb/same-outcome-spread","category":"market","description":"Prediction market arbitrage and same-outcome spread API for Polymarket, Kalshi, and Gemini. Finds YES or NO price gaps across venues.","price_listed":0.001,"price_asked":0.1,"state":"overcharges","state_label":"Asked 100.0x its listed price for its own example","checks_7d":1,"answered_7d":1,"latency_ms_median":263,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"includeIndicative":true,"limit":3,"minEdge":0,"sources":"polymarket,kalshi,gemini"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"additionalProperties":false,"properties":{"includeIndicative":{"description":"Optional flag for indicative price-only rows. Defaults to true.","type":"boolean"},"limit":{"description":"Optional maximum arb rows to return. Defaults to 20 and is hard-capped at 20.","maximum":20,"minimum":1,"type":"number"},"minEdge":{"description":"Optional minimum net arb edge as a decimal or percentage-style value.","minimum":0,"type":"number"},"outcome":{"description":"Optional same-outcome filter.","enum":["yes","no"],"type":"string"},"sources":{"description":"Optional comma-separated venue filter: polymarket, kalshi, gemini.","type":"string"}},"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.1,"price_match":false,"latency_ms":263,"error":null}],"description_full":"Prediction market arbitrage and same-outcome spread API for Polymarket, Kalshi, and Gemini. Finds YES or NO price gaps across venues.","last_updated":"2026-09-24T11:00:22.338Z","schemes":["exact"]}