{"slug":"2s-io-api-predict-matched-pairs-d0d3da","title":"Cross-venue equivalent-market pairs for arbitrage / relative-value spotting","host":"2s.io","method":"GET","resource":"https://2s.io/api/predict/matched-pairs","category":"market","description":"Cross-venue equivalent-market pairs for arbitrage / relative-value spotting. We fuzzy-match open Polymarket vs Kalshi markets by title-token overlap and return candidate pairs with both venues' YES prices and the implied-probability spread (Polymarket YES minus Kalshi YES). Tune with minScore (0-1 t","price_listed":0.012,"price_asked":0.012,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":277,"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":{"limit":1,"minScore":0},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"properties":{"method":{"const":"GET"},"queryParams":{"additionalProperties":false,"properties":{"limit":{"description":"Max pairs (default 20).","maximum":50,"minimum":1,"type":"integer"},"minScore":{"description":"Minimum title-similarity score 0-1 (default 0.3).","maximum":1,"minimum":0,"type":"number"}},"type":"object"},"type":{"const":"http"}},"required":["type","method","queryParams"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-28","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.012,"price_match":true,"latency_ms":277,"error":null}],"description_full":"Cross-venue equivalent-market pairs for arbitrage / relative-value spotting. We fuzzy-match open Polymarket vs Kalshi markets by title-token overlap and return candidate pairs with both venues' YES prices and the implied-probability spread (Polymarket YES minus Kalshi YES). Tune with minScore (0-1 title-similarity floor) and limit. Heuristic — a high score is a strong candidate, not a guaranteed identical contract. Read-only, keyless. No public source maps these directly; the pairing is derived by 2s.io.","last_updated":"2026-09-28T11:22:03.08Z","schemes":["exact"]}