CrowdIntelDefinition
What is Polymarket API?
Programmatic access to Polymarket data — market metadata, prices, and order books — plus third-party analytics APIs built on the underlying on-chain data.
In detail
Polymarket exposes several APIs: the Gamma API for market metadata (slugs, titles, categories, resolution), the CLOB API for the central-limit order book and price data, and a data API for positions and activity. Because trades settle on-chain, the raw data is also fully reconstructable from Polygon without any API. Third-party analytics platforms build higher-level APIs on top — wallet stats, leaderboards, signals, and cluster data — for developers who want the intelligence layer rather than raw feeds. One gotcha: search Gamma by slug, not condition_id, which returns wrong results.
How CrowdIntel measures it
CrowdIntel offers a public REST API (/api/v1) over the analytics layer: wallets, markets, signals, leaderboards, clusters, trades, investigations, and webhooks, with API keys and paid tiers. It's built on the same on-chain index that powers the dashboard, so API consumers get shrinkage-adjusted win rates, funding-graph clusters, and detection scores rather than raw feeds they'd have to compute themselves.
Frequently asked
Does Polymarket have an API?
Yes — Gamma (market metadata), CLOB (order book and prices), and a data API for positions and activity. All trades are also reconstructable directly from Polygon.
How do I get analytics, not just raw market data?
Use a third-party analytics API. CrowdIntel's /api/v1 exposes wallet stats, leaderboards, signals, and cluster data computed from the on-chain index.
Any gotchas with the Polymarket API?
Search Gamma by slug, not condition_id — querying by condition_id returns wrong results. And position/PnL endpoints require careful handling of merges, splits, and negative-risk conversions.
Related terms
- On-chain trading analysis
The practice of drawing trading insights directly from blockchain transaction data rather than exchange-reported metrics — enabling verifiable, un-gameable analytics.
- Polymarket whale tracker
A tool that monitors large Polymarket wallets and surfaces their trades in real time — used by traders to follow smart money and detect insider activity.
- Prediction market
A market where participants trade contracts whose payout depends on the outcome of a future event — producing prices that aggregate crowd beliefs into probability estimates.
- Polymarket leaderboard
A ranking of Polymarket wallets by performance — realized profit, win rate, or volume — used to find the platform's most successful traders.