Dev.to
6/17/2026

Polymarket's Price-to-Beat Has No API — Why a Co-located Server Gets It in Real Time, Not 15 Seconds
Short summary
Polymarket's Up/Down markets don't expose the reference price via API, requiring traders to reconstruct it from Chainlink/Binance feeds. Co-locating servers in Amsterdam—matching Polymarket's infrastructure—enables sampling at ~1ms with 99% accuracy, versus 15 seconds via UI scraping. This latency edge is critical for arbitrage during the chaotic T0 window immediately after market open.
- •Polymarket PTB (reference price) must be reconstructed from upstream feeds, not API calls
- •Co-location in Amsterdam achieves 1ms sampling vs 15sec UI scrape with 99% accuracy match
- •Latency advantage enables T0 arbitrage when order books are thin and prices unsettled
Generated with AI, which can make mistakes.
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