Order-Book Archive · $299 early
Polymarket shows you the order book as it is now. It publishes no order-book history (a price-history endpoint exists; depth history does not) — when a market moves, the evidence is gone. We have been recording the full depth of every book change since January 2026, and the trade tape since December 2025. This page shows exactly what you get.
Historical full-depth Polymarket order books for backtesting, research and trading infrastructure.
Agent-ready: the same archive powers the TickTape MCP/REST API.
Known gaps: the trade tape lost ~8 days in March 2026 to a disk incident; sports books are off-season since Jun 15 and resume in autumn.
One full day of NDJSON + schema + loader notebook. No card required.
One of ~a million records per day
2026-07-10, 14:16:00 UTC — sixty seconds into a BTC 15-minute window. Left: the book as a trader saw it. Right: the raw record you receive. The archive holds one of these for every book change of every window.
| Ask price | Size (shares) |
|---|---|
| spread 1c · mid 0.545 | |
| Bid price | Size (shares) |
{
"ts": 1783692960930,
"crypto": "btc",
"side": "up",
"window_slug": "btc-updown-15m-1783692900",
"time_remaining": 840,
"event_type": "book",
"bids": [
{"price": "0.54", "size": "0.65"},
{"price": "0.53", "size": "584.73"},
{"price": "0.52", "size": "614.54"},
... all levels, every update
],
"asks": [
{"price": "0.55", "size": "1278.27"},
{"price": "0.56", "size": "1981.64"},
...
]
}
NDJSON, hourly files, gzip. Loads with two lines of pandas. Schema docs and a loader snippet ship with every dataset.
Proof of usefulness
We replayed every sub-$1.00 moment across 2,664 windows. Median lifetime: 1 millisecond. Zero lasted a second. One study, question closed — before risking a dollar.
The same math on slower markets persists for a median of 65 seconds. Knowing which market types leave time to act is worth more than any signal.
Round-trip taker fees at mid-range prices exceed a 2-cent scalp target. Backtest against real books and 2026 fee curves before you build.
Pricing
| Offer | Contents | Price |
|---|---|---|
| The Archive | everything recorded to date — full order books (crypto + sports) plus the trade tape with trader identity (trades ≥ 10 shares; smaller prints not recorded) | $299 early → $599 after launch |
| Daily sync | optional — keeps your archive synced daily | + $99 / mo |
License: non-exclusive, single-team internal use, no raw redistribution. Published research from the data: encouraged, with attribution. Comparable: Tardis.dev sells crypto-exchange book history at $300–550/month per exchange — and covers no prediction market.
One free day of crypto books + schema docs + the loader notebook, so your pipeline works before you pay.
Get the free data sampleor write to hello@ticktape.cc