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jamsdoescode
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polymarket

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

Updated Jul 7, 2026
Search Tags:#rest api#market data#orderbook#polymarket#odds#price history#prediction markets
One-click install
npx skills add https://github.com/jamsdoescode/Erik-s-Portfolio --skill polymarket-jamsdoescode
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: polymarket
Source: https://github.com/jamsdoescode/Erik-s-Portfolio/tree/main/openclicky/AppResources/OpenClicky/OpenClickyBundledSkills/polymarket
Command: npx skills add https://github.com/jamsdoescode/Erik-s-Portfolio --skill polymarket-jamsdoescode

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve? It gives you direct read-only access to Polymarket prediction market data—odds, prices, orderbooks, and history—without needing authentication, API keys, or a crypto wallet. ## Core Features & Use Cases - Market Discovery & Search: Search events and markets through the Gamma API and parse nested market data including double-encoded fields like outcomePrices and clobTokenIds. - Real-Time Prices & Orderbooks: Query the CLOB API for live Yes/No prices, orderbook depth, and price history using clobTokenIds and conditionId. - Use Case: Ask "What are the current odds on the next US presidential election?" and get back market questions with probabilities formatted as percentages plus trading volume in USDC. ## Quick Start Ask the assistant to search Polymarket for current odds on a specific event and show the Yes/No probabilities with volume.

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 the Gamma API public-search endpoint with your query, then parse the returned events and nested markets. Present each market's outcomePrices as percentages, for example "Yes: 65.2%, No: 34.8%", along with volume in USDC.

How do I get Polymarket orderbook and price history data?▼

Use the CLOB API with the market's clobTokenIds for real-time prices and orderbook depth, and the conditionId hex string for price history queries. Both fields come from the Gamma API market objects as JSON-encoded strings.

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

No, all three public APIs (Gamma, CLOB, and Data) are read-only and require zero authentication. Rate limits are generous, around 4,000 to 9,000 requests per 10 seconds depending on the endpoint.

Can I place trades on Polymarket through this API?▼

No, this skill is read-only and does not support placing trades. Trading requires wallet-based crypto authentication using EIP-712 signatures, which is outside the scope of these public data endpoints.

Why do Polymarket outcomePrices fields fail to parse?▼

The Gamma API returns outcomePrices, outcomes, and clobTokenIds as JSON strings inside JSON responses, meaning they are double-encoded. Parse them with json.loads(market['outcomePrices']) in Python to get the actual array.

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