{"sample":true,"example_data":true,"note":"Static example with the real response shape of /oi/history/{symbol}. Not live data; values are illustrative and do not change. The live route is paid per call via x402 (USDC on Base, eip155:8453); no account, no API key, no subscription.","paid_route":{"method":"GET","path":"/oi/history/{symbol}","url":"https://cryptofeed402.site/oi/history/BTC?hours=3","price":"$0.005","currency":"USDC","network":"eip155:8453","payment":"x402"},"symbol":"BTC","venue":"hyperliquid","interval":"about 1h","window":{"from":"2026-10-19T21:00:00.000Z","to":"2026-10-20T00:00:00.000Z","hours":3},"as_of":"2026-10-20T00:00:00.000Z","generated_at":"2026-10-20T00:00:00.000Z","count":3,"stats":{"change_pct":0.5,"min_coins":30000,"max_coins":30150,"first_at":"2026-10-19T22:00:00.000Z","last_at":"2026-10-20T00:00:00.000Z"},"coverage":{"first_snapshot_at":"2026-10-17T00:00:00.000Z","retention_days":8,"max_hours_per_call":192,"note":"Snapshots are taken by cryptofeed402 about every hour (Hyperliquid has no public OI history); gaps mean the server was restarting."},"points":[{"time":"2026-10-19T22:00:00.000Z","open_interest_coins":30000,"open_interest_usd":3000000000,"mark_px":100000,"funding_hourly":0.0000125},{"time":"2026-10-19T23:00:00.000Z","open_interest_coins":30080,"open_interest_usd":3008000000,"mark_px":100000,"funding_hourly":0.0000125},{"time":"2026-10-20T00:00:00.000Z","open_interest_coins":30150,"open_interest_usd":3015000000,"mark_px":100000,"funding_hourly":0.0000125}],"source":"cryptofeed402 hourly snapshots of Hyperliquid metaAndAssetCtxs (open interest in coins, mark price, hourly funding)","disclaimer":"Automated data for AI agents. Not financial advice."}