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polymarket-historical-data

Free Polymarket historical data: order books, trades and outcomes for 2,278 markets across 7 events (Bitcoin 5 minute markets, MLB, the World Cup final, UFC 330, Counter-Strike, weather, Apple), Parquet and CSV, backtestable with the marketlens Python SDK. Full archive at marketlens.trade

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GITHUB · launched Sep 12, 2026 · 7 upvotes (top 95%) · 0 views

Niche: prediction market platforms · 44 launches, 2 in the last 7 days · Explore this niche →

Category and tags
  • Fintech
  • Data infrastructure
  • Developer
  • Not AI
  • Commercial product
  • backtesting
  • csv
  • dataset
  • finance
  • historical-data
  • market-data
  • +6 more

Visit website ↗ Source listing ↗

More like this: all 44 launches in prediction market platforms →

Could you build this?

Partial The client SDK and basic CSV/Parquet viewer are easy to vibe code, but scraping, streaming, storing, and continuously normalizing massive high-frequency L2 order book data across thousands of markets is a heavy data engineering task.

What it would actually take: A working system requires a distributed ingestion cluster maintaining persistent WebSocket connections to Polymarket/CLOB endpoints, handling reconnects, sequence deduplication, and parsing high-throughput order book snapshots and diffs. The backend requires columnar storage (e.g., DuckDB, ClickHouse, Apache Parquet on S3) optimized for petabyte-scale historical time-series queries, requiring solid data infrastructure engineering.

Competitors

Other products that read as similar to this one : 273 launches clear the similarity bar, closest 8 shown.

Attention rank: #273 of 274 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 318 days after the earliest competitor.

  • outcometick · ph · 2026-10-11 · 1 upvotes · similarity 0.48
  • PredictionMarkets.tools · ph · 2026-09-28 · 1 upvotes · similarity 0.48
  • GhostLeg · ph · 2026-09-16 · 3 upvotes · similarity 0.47
  • Predictefy · ph · 2026-09-30 · 1 upvotes · similarity 0.45
  • FinzData · ph · 2026-11-10 · 1 upvotes · similarity 0.44
  • ArbTrader · ph · 2026-10-29 · 1 upvotes · similarity 0.44
  • Odds-API.io · ph · 2026-11-13 · 1 upvotes · similarity 0.43
  • synpath · github · 2026-09-28 · 34 upvotes · similarity 0.43

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.