polymarket

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

Updated Aug 19, 2026

Search Tags:#rest api #market data #orderbook #polymarket #price history #prediction markets #betting odds

Ready to run

npx skills add https://github.com/jakubbartnik/honey-barrel-finale --skill polymarket-jakubbartnik

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: polymarket
Source: https://github.com/jakubbartnik/honey-barrel-finale/tree/main/honey-barrel-finale/workspace/hermes/skills/research/polymarket
Command: npx skills add https://github.com/jakubbartnik/honey-barrel-finale --skill polymarket-jakubbartnik

SYSTEM DOCUMENTATION & REQUIREMENTS

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

What problem does it solve? Finding current prediction market odds and market data on Polymarket requires navigating multiple APIs and parsing double-encoded JSON fields, which is tedious to do manually. ## Core Features & Use Cases - Market Discovery: Search events and markets by keyword or browse trending markets sorted by volume through the Gamma API. - Real-Time Pricing: Fetch current prices, midpoints, spreads, and full orderbooks for any market token via the CLOB API. - Historical Analysis: Retrieve price history charts and recent trade data using condition IDs and the Data API. - Use Case: Ask "what are the odds of a recession in 2025?" and get back matching markets with Yes/No probabilities, trading volume, and price history. ## Quick Start Ask the agent to search Polymarket for current odds on a topic, such as "what are the current Polymarket odds for the next US presidential election winner?"

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 to find matching events and markets. The outcomePrices field contains Yes/No probabilities, which you present as percentages along with trading volume.

How to get Polymarket orderbook and price history data?▼

Use the CLOB API with the market's clobTokenIds for orderbook, price, midpoint, and spread endpoints. For price history, call the prices-history endpoint with the market's conditionId and a time interval like 1d, 1w, or all.

Does the Polymarket API require authentication or API keys?▼

No, all three Polymarket APIs used here (Gamma, CLOB, and Data) are public read-only REST endpoints requiring zero authentication. Rate limits are generous, around 1,000 to 9,000 requests per 10 seconds depending on the API.

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 does Polymarket price history return empty for some markets?▼

Very new markets may have no recorded price history yet, so the prices-history endpoint returns an empty result. Check the market's creation date and try again after trading activity has accumulated.