skills.rest
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polymarket

Query Polymarket REST APIs for odds, prices, volume, and formatted percentages.

2|Updated Mar 26, 2026
Search Tags:#market-data#read-only#api-integration#prediction-markets#polymarket#price-history
One-click install
npx skills add https://github.com/CUexter/hermes-agent --skill polymarket-cuexter
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: polymarket
Source: https://github.com/CUexter/hermes-agent/tree/main/skills/research/polymarket
Command: npx skills add https://github.com/CUexter/hermes-agent --skill polymarket-cuexter

SYSTEM DOCUMENTATION & REQUIREMENTS

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

What problem does it solve?

Query Polymarket data from public REST APIs to retrieve market prices, volumes, and price history without authentication.

Core Features & Use Cases

  • Read-only access to Gamma, CLOB, and Data APIs for markets, prices, and history.
  • Normalize and present "Yes/No" probabilities with volumes for quick decision making.
  • Use cases: price discovery, trend monitoring, and cross-market comparisons.

Quick Start

Ask the skill to fetch the latest market prices for a given Polymarket market.

Frequently Asked Questions about polymarket

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

FAQPage Schema
How do I query Polymarket prediction market data without authentication?▼

You can query Polymarket prediction market data without authentication by accessing public REST APIs. This read-only approach retrieves market prices, volumes, and price history directly from Gamma, CLOB, and Data APIs.

How do I fetch current odds and price history for Polymarket markets?▼

To fetch current odds and price history for Polymarket markets, query the Gamma and CLOB APIs. The process normalizes data to present Yes/No probabilities and formats prices as percentages for quick decision making.

Why does Polymarket API return malformed JSON for outcomePrices and clobTokenIds?▼

Polymarket API fields like outcomePrices, outcomes, and clobTokenIds are double-encoded JSON strings. Proper data retrieval requires parsing these nested JSON structures to normalize market prices and volumes accurately.

Can I monitor prediction market volume and price discovery using public Polymarket APIs?▼

Yes, you can monitor prediction market volume and price discovery using public Polymarket APIs. Read-only access to the Data API allows trend monitoring and cross-market comparisons without requiring authentication keys.

Does querying Polymarket market data require write access or API keys?▼

Querying Polymarket market data does not require write access or API keys. The integration relies strictly on read-only public REST API endpoints to retrieve market prices, odds, and historical data safely.

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