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Polymarket chain: which blockchain does Polymarket use?

When people ask "Polymarket chain" they usually want to know which blockchain Polymarket runs on and what that means for trading. Polymarket runs on Polygon PoS (chain ID 137) and settles using pUSD, a wrapped USDC. That setup makes trading gasless for end users via Polymarket's Relayer and keeps settlement fast and cheap. If you're building or trading with bots, Polygon's low latency and low fees materially change execution characteristics compared with L1 networks.

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Why Polygon PoS matters for traders

Polygon PoS is a Layer-2-friendly environment with low transaction costs and fast finality compared with many L1s. On Polymarket this means wallet deployment, approvals, order placement, and CTF operations are gas-free for users because transactions are relayed through Polymarket's Relayer. For bots and high-frequency strategies, predictable low-cost settlement reduces operational overhead and allows tighter margin capture.

The chain choice also influences tooling: you interact with pUSD (Polymarket's wrapped USDC) and Gnosis's CTF outcome tokens on Polygon. That affects how you manage custody, watch for transfers, and build indexers or websockets that subscribe to Polymarket's market feeds.

APIs and real-time feeds on Polygon

Polymarket exposes three REST APIs and a market WebSocket that reflect the Polygon-based trading state. Use Gamma for markets, Data for positions and trades, CLOB for order-book reads and order placement, and the market WebSocket for real-time best_bid_ask and last_trade_price events. All of these surfaces report activity on the Polygon PoS chain and are the canonical sources for bot trading logic.

If you're integrating, remember the exact base URLs and rate limits: Gamma at https://gamma-api.polymarket.com, Data at https://data-api.polymarket.com, CLOB at https://clob.polymarket.com, and the market WS at wss://ws-subscriptions-clob.polymarket.com/ws/market.

How PolyArb leverages the Polymarket chain

PolyArb is a non-custodial arbitrage bot built to trade on Polymarket's Polygon PoS infrastructure. It runs live today, offering $99/month, 40ms latency versus ~800ms for free bots, Telegram and Discord alerts, and a $7.62 minimum guaranteed edge per trade. Because Polymarket sponsors gas and uses pUSD and CTF tokens, PolyArb focuses on execution speed, order-book watching, and immediate FAK placement to capture intra-market edges.

Note the usual execution and settlement risks: UMA resolution disputes, partial fills or slippage, fee changes, and smart-contract risk. PolyArb reduces latencies and automates split/merge/redeem flows but does not eliminate those fundamental risks.

What about competitors and cross-chain questions

If you're comparing Polymarket to other platforms like Kalshi, PredictIt, or Manifold, the key difference here is chain and settlement model. Polymarket runs on Polygon PoS with on-chain CTF tokens and pUSD settlement. Other platforms use different on- or off-chain settlement arrangements and regulatory regimes. Cross-platform arbitrage exists but is out of scope for PolyArb, which focuses on intra-Polymarket opportunities.

Always factor in geo-restrictions: some jurisdictions are blocked from placing new orders on Polymarket. Do not attempt VPN workarounds — they violate Polymarket's Terms of Service.

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FAQ

What blockchain does Polymarket use?
Polymarket runs on Polygon PoS (chain ID 137) and settles trades in pUSD, Polymarket's wrapped USDC.
Is gas required to trade on Polymarket?
No — Polymarket sponsors gas through its Relayer. Wallet deployment, approvals, order placement, and CTF operations are gas-free for end users.
Can I run arbitrage bots on the Polymarket chain?
Yes. The low fees and fast finality on Polygon PoS make it suitable for bot trading. PolyArb is a non-custodial bot built for this environment and offers faster latency and alerts to capture intra-market edges.
Does PolyArb work across other platforms?
PolyArb focuses on intra-Polymarket arbitrage on Polygon PoS. Cross-platform strategies involving Kalshi, PredictIt, or Manifold are outside its scope.

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