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polymarket-api

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Polymarket exchange mechanics — on-chain Polygon CTF, Gamma/CLOB/Data APIs, EIP-712 auth, identifier model, WebSocket, settlement, and geo/KYC constraint

skills/polymarket-api/SKILL.md

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# Polymarket API

Polymarket is a **prediction market on Polygon mainnet**. Every market is a pair of YES/NO **ERC-1155** tokens issued by the Conditional Token Framework (CTF), collateralized 1:1 in USDC. Off-chain CLOB matching, on-chain settlement, **zero taker fees**. Prices are in [0.00, 1.00] USDC; YES + NO ≈ 1.0 per market.

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> **Before you write any API code — read the live docs first.**
>
> - Docs: https://docs.polymarket.com
> - Official Python SDK: https://github.com/Polymarket/py-clob-client
>
> Polymarket endpoints and auth flows have changed without notice. Prefer the official `py-clob-client` SDK over hand-rolled HTTP; it handles EIP-712 derivation, API credential management, and order signing. Only hand-roll when the SDK doesn't expose what you need.

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