{"slug":"blockrun-ai-api-v1-pm-polymarket-markets-hash-open-interest-20a5fe","title":"Get historical open interest data for a market","host":"blockrun.ai","method":"GET","resource":"https://blockrun.ai/api/v1/pm/polymarket/markets/:hash/open_interest","category":"market","description":"Get historical open interest data for a market","price_listed":0.0085,"price_asked":0.0085,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":247,"reported_calls_30d":3,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"discoverable":true,"method":"GET","pathParams":{"hash":"EVM transaction or block hash (0x-prefixed, 64 hex characters)"},"queryParams":{},"type":"http"},"output_schema":{"properties":{"input":{"properties":{"query":{"properties":{},"required":[],"type":"object"}},"type":"object"},"output":{"properties":{"example":{"properties":{"data":{"type":"object"}},"type":"object"}},"type":"object"}},"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.0085,"price_match":true,"latency_ms":247,"error":null}],"description_full":"Get historical open interest data for a market","last_updated":"2026-09-24T06:15:37.838Z","schemes":["exact"]}