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BETA — This API is currently in beta. If you run into any issues, please contact [email protected].
Historical Data Availability — Historical data is only available from 02/08/2026 onwards. Data before this date is not accessible.

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Overview

The Entity Market Data API gives you programmatic access to Polymarket order book data — including live snapshots and historical tick-level events — for any market condition. Use it to:
  • Retrieve full order book snapshots (bids and asks)
  • Track price changes over time
  • Build trading strategies and analytics dashboards

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Quick start

Create an API key

Sign up and generate your first API key in under a minute.

Find a condition ID

Look up the condition ID for any Polymarket event.

API reference

Full endpoint documentation with request/response examples.

Helper scripts

Python scripts for finding condition IDs and working with market data.

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Make your first request

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.entityml.com/api/v1/market/data?condition_id=0008043c3ed513ecff7ee64380fc943dc73eb3dfb6674f281149efe4769f7515&date=2026-02-10"

See the full getting started guide

Step-by-step instructions with multi-language code examples.