polymarket-apilisted

# 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. --- > **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. --- ## Identifier model You will juggle four distinct IDs — get them confused and queries silently return wrong data. | ID | What it is | |----|-----------| | `condition_id` | On-chain hex ID of the market (the CTF condition) | | `clob_token_ids` | The YES/NO **pair** of ERC-1155 token IDs — a two-element list | | `token_id` | A **single** outcome token — what you pass to order-book and WebSocket queries | | `event_id` | Parent grouping (e.g. all brackets for "NYC high today") | --- ## Quick Start ### 1. Read markets — Gamma API (no auth required) ```python import httpx # CRITICAL: default sort is OLDEST-first — always override or you silently get closed markets events = httpx.get("https://gamma-api.p