Does Polymarket have an API?

Yes. Polymarket exposes three services: Gamma (market discovery), CLOB (order book and trading) and Data (history and analytics), plus a WebSocket feed. Reading market data needs no key; placing orders requires API credentials and EIP-712 signing.

Is the Polymarket API free?

Reading market data via Gamma, Data and the public CLOB endpoints is free and needs no authentication. You only need credentials to place or cancel orders.

Which Polymarket SDK should I use in 2026?

The V2 line: py-clob-client-v2 (Python), @polymarket/clob-client-v2 (Node), or the official Rust client polymarket_client_sdk_v2. New projects can use the unified beta SDK (polymarket-client / @polymarket/client). The old py-clob-client 0.34.x is V1 and archived.

Polymarket API och utvecklarzon

Den kompletta och aktuella utvecklarreferensen för Polymarket: Gamma, CLOB V2 och Data, i Python, Rust och Node. Varje endpoint, varje felkod, plus startpaket och AI-färdiga regler.

Start: autentisering Färdiga kodrecept Startpaket Botguide

Referens

CLOB

Polymarket CLOB API: Endpoints, Orders, Fees, RFQ and Geoblock

Polymarket CLOB API guide: every endpoint, auth and order signing, placing orders in Python and TypeScript, fees, rate limits, the geoblock endpoint and RFQ.

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Gamma

Polymarket Gamma API: Markets, Events & Token IDs (2026)

The Polymarket Gamma API (gamma-api.polymarket.com) is public and keyless: discover markets and events, search, and get a market's token IDs.

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Data

Polymarket Data API v2: Positions, Trades, Activity and Leaderboard

Polymarket Data API v2 guide: positions, PnL, trades, activity, holders and leaderboard endpoints, no API key, cursor pagination and the v1 to v2 route map.

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Auth

Polymarket API Authentication & Wallets (Signature Types, EIP-712)

How Polymarket API authentication works in 2026: L1 EIP-712 to derive API keys, L2 HMAC request signing, signature types 0-3, the funder address, and the…

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Bygg och felsök

SDKs

Which Polymarket SDK to Use in 2026 (Python, Node, Rust)

Which Polymarket SDK should you use in 2026? py-clob-client-v2 (Python), @polymarket/clob-client-v2 (Node), the official Rust client, or the unified beta SDK.

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WebSocket

Polymarket WebSocket API: Market and User Channels, RTDS and PolyBolt

Polymarket WebSocket guide: market and user channel URLs, the assets_ids subscribe message, PING heartbeat, RTDS activity, PolyBolt prices, Python and TS code.

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Recipes

Polymarket API Recipes: Copy-Paste Snippets (V2, Python)

Copy-paste Polymarket API recipes (CLOB V2 / pUSD): token IDs from a slug, read the book and estimate slippage, place and cancel a limit order, track a…

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Errors

Polymarket API Errors: Not Enough Balance / Allowance, Deposit Wallet and Signer Fixes (2026 Guide)

Fix Polymarket CLOB API errors: not enough balance / allowance on sells, maker address not allowed (deposit wallet), signer vs API key, order_version_mismatch.

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Verktyg, paket och AI

Kits

Boilerplates

Seven production-grade starter kits: Python, Rust, Node + full framework. Zero edge; you bring the signal.

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Vibe-Code a Polymarket Bot Safely (Claude Code, Cursor, 2026)

Build a Polymarket bot with Claude Code or Cursor without losing money: ground the agent on AGENTS.md, start read-only, keep keys in env, trade paper first.

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5-min

Polymarket 5-Minute Crypto Markets: the API mechanics (BTC up/down)

How to build bots for Polymarket's 5- and 15-minute crypto up/down markets (Bitcoin Up or Down): find them via Gamma, read the CLOB book, gate on…

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AI rules

AGENTS.md

Drop-in rules file for AI coders (Cursor, Claude Code, Copilot) - the correct V2 patterns, baked in.

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AI index

llms.txt

Machine-readable index of the whole developer zone for LLM agents and crawlers.

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