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CHENHUI-X
CHENHUI-XCOMMUNITY
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polymarket

Query Polymarket prediction markets for prices, orderbooks, and price history via public REST APIs.

Updated Jul 3, 2026
Search Tags:#rest api#market data#orderbook#polymarket#odds#price history#prediction markets
One-click install
npx skills add https://github.com/CHENHUI-X/toolbox --skill polymarket-chenhui-x
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: polymarket
Source: https://github.com/CHENHUI-X/toolbox/tree/main/custom-skills/research/polymarket
Command: npx skills add https://github.com/CHENHUI-X/toolbox --skill polymarket-chenhui-x

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve? Finding current prediction market odds and event probabilities requires manually browsing Polymarket or writing custom API calls. This Skill provides direct read-only access to Polymarket's public REST APIs so you can search markets, check live prices, inspect orderbooks, and review price history without authentication. ## Core Features & Use Cases - Market Search & Discovery: Search events and markets via the Gamma API, list trending events by volume, and filter by tags or slugs. - Real-Time Pricing & Orderbooks: Fetch current prices, midpoints, spreads, and full orderbook depth from the CLOB API using clobTokenIds. - Price History & Trades: Retrieve historical price charts by conditionId and recent trade data from the Data API. - Use Case: A user asks "What are the odds of a rate cut this year?" — the Skill searches Polymarket, parses the double-encoded outcomePrices field, and returns "Yes: 65.2%, No: 34.8%" with trading volume. ## Quick Start Ask the agent to search Polymarket for current odds on a topic, for example: "What are the current Polymarket odds on Bitcoin reaching $150k this year?"

Frequently Asked Questions about polymarket

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I check Polymarket odds for an event?▼

Search Polymarket using the Gamma API public-search endpoint with your query, then read the outcomePrices field from the returned markets. Prices map directly to probabilities, so 0.65 means the market implies a 65% chance.

How to get Polymarket price history for a market?▼

Use the CLOB API prices-history endpoint with the market's conditionId, an interval such as 1d, 1w, or all, and a fidelity value for data point count. Very new markets may return empty history.

Does the Polymarket API require authentication or an API key?▼

No authentication is needed for read-only data. All Gamma, CLOB, and Data API endpoints used here are public GET requests, and rate limits are generous for normal usage.

Can I place trades on Polymarket with this API?▼

No, this Skill is read-only and does not support placing trades. Trading requires wallet-based crypto authentication with EIP-712 signatures, which is outside its scope.

Why does Polymarket outcomePrices parsing fail in Python?▼

The Gamma API returns outcomePrices, outcomes, and clobTokenIds as JSON strings inside JSON responses, known as double-encoding. Parse them with json.loads() before reading individual values.

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