{
  "dataset": "PolyHistorical Polymarket historical order book data sample",
  "schema_version": "2026-06-starter",
  "market": {
    "slug": "btc-updown-5m-sample-001",
    "asset": "BTC",
    "market_type": "5m",
    "resolved": true,
    "description": "Sample structure for historical Polymarket order book snapshots."
  },
  "snapshots": [
    {
      "timestamp": "2026-06-01T12:00:00.000Z",
      "reference_price": 68120.55,
      "tokens": {
        "up": {
          "best_bid": 0.47,
          "best_ask": 0.49,
          "bids": [
            { "price": 0.47, "size": 420.10 },
            { "price": 0.46, "size": 392.30 }
          ],
          "asks": [
            { "price": 0.49, "size": 401.20 },
            { "price": 0.50, "size": 388.90 }
          ]
        },
        "down": {
          "best_bid": 0.51,
          "best_ask": 0.53,
          "bids": [
            { "price": 0.51, "size": 401.20 },
            { "price": 0.50, "size": 388.90 }
          ],
          "asks": [
            { "price": 0.53, "size": 420.10 },
            { "price": 0.54, "size": 392.30 }
          ]
        }
      }
    },
    {
      "timestamp": "2026-06-01T12:00:00.300Z",
      "reference_price": 68132.80,
      "tokens": {
        "up": {
          "best_bid": 0.49,
          "best_ask": 0.51,
          "bids": [
            { "price": 0.49, "size": 510.00 },
            { "price": 0.48, "size": 445.00 }
          ],
          "asks": [
            { "price": 0.51, "size": 470.60 },
            { "price": 0.52, "size": 411.00 }
          ]
        },
        "down": {
          "best_bid": 0.49,
          "best_ask": 0.51,
          "bids": [
            { "price": 0.49, "size": 470.60 },
            { "price": 0.48, "size": 411.00 }
          ],
          "asks": [
            { "price": 0.51, "size": 510.00 },
            { "price": 0.52, "size": 445.00 }
          ]
        }
      }
    }
  ]
}