Crypto Markets

Crypto prediction market data API

Resolved Markets captures BTC, ETH, SOL, and XRP Polymarket orderbooks at high frequency, storing full bid/ask depth arrays with millisecond timestamps and paired spot reference prices. Use it to replay market states, backtest spread strategies, and study how prediction-market probabilities react to crypto price movement.

Last updated:

  • BTC, ETH, SOL, XRPAssets
  • ~20 HzCapture rate
  • Full depthSnapshot shape
  • BTC includedFree tier

Pull live BTC orderbook data

curl -s "https://api.resolvedmarkets.com/v1/markets/live?category=crypto&subcategory=BTC" \
  -H "X-API-Key: rm_your_key" | jq '.markets[0]'

curl -s "https://api.resolvedmarkets.com/v1/markets/<condition_id>/orderbook" \
  -H "X-API-Key: rm_your_key" | jq '{up_bid: .up.best_bid, up_ask: .up.best_ask}'

Use cases

  • Spread and liquidity research. Measure top-of-book and full-depth changes before resolution.
  • Crypto cross-asset studies. Join prediction-market probabilities with spot reference prices stamped on snapshots.
  • Strategy backtesting. Feed mid price and spread into the visual builder, AI Backtest Agent, vectorbt, Backtrader, or custom notebooks.

Frequently asked questions

Which crypto prediction markets are covered?

Resolved Markets tracks BTC, ETH, SOL, and XRP Up/Down markets across common Polymarket timeframes such as 5m, 15m, 1h, and 1d when those markets are active.

How fast is crypto orderbook capture?

Crypto orderbooks are captured event-driven at roughly 20 Hz, or one snapshot about every 50 milliseconds when the book is moving. Idle markets naturally produce fewer persisted snapshots.

Does each snapshot include crypto spot price?

Yes. Crypto snapshots include the paired spot reference price and a staleness field in milliseconds so researchers can join prediction-market probabilities to the underlying crypto move without a separate feed.

Can I backtest BTC Polymarket strategies?

Yes. Use the REST snapshots endpoint or CLI parquet export on any tier (the Free tier already covers all crypto coins with full depth and unlimited history, 5,000 credits/mo). The hosted visual Strategy Builder and AI Backtest Agent require a paid plan (Pro, Scale, or Enterprise).

Is this affiliated with Polymarket?

No. Resolved Markets is an independent third-party data service operated by Elcara LLC-FZ. It reads public market data and stores historical snapshots for research and developer use.

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