polymarket

使用方法

复制安装命令，在自己的智能体环境安装前先检查源码包。
从原始文档核对所需工具、凭据和支持的宿主。
说明输入材料与期望交付物，并对照来源检查输出。

npx skills add https://github.com/nousresearch/hermes-agent --skill polymarket

开始前需了解

安装不包含模型订阅、API 额度或访问文件的权限。
仓库星数和安装量反映活跃情况，不等于独立质量或安全测试。

仓库原始内容

按源仓库内容呈现，保留标题、案例、代码、表格、链接以及原文引用的演示图片。

Polymarket — Prediction Market Data

Query prediction market data from Polymarket using their public REST APIs. All endpoints are read-only and require zero authentication.

See references/api-endpoints.md for the full endpoint reference with curl examples.

When to Use

User asks about prediction markets, betting odds, or event probabilities
User wants to know "what are the odds of X happening?"
User asks about Polymarket specifically
User wants market prices, orderbook data, or price history
User asks to monitor or track prediction market movements

Key Concepts

Events contain one or more Markets (1:many relationship)
Markets are binary outcomes with Yes/No prices between 0.00 and 1.00
Prices ARE probabilities: price 0.65 means the market thinks 65% likely
outcomePrices field: JSON-encoded array like ["0.80", "0.20"]
clobTokenIds field: JSON-encoded array of two token IDs [Yes, No] for price/book queries
conditionId field: hex string used for price history queries
Volume is in USDC (US dollars)

Three Public APIs

Gamma API at gamma-api.polymarket.com — Discovery, search, browsing
CLOB API at clob.polymarket.com — Real-time prices, orderbooks, history
Data API at data-api.polymarket.com — Trades, open interest

Typical Workflow

When a user asks about prediction market odds:

Search using the Gamma API public-search endpoint with their query
Parse the response — extract events and their nested markets
Present market question, current prices as percentages, and volume
Deep dive if asked — use clobTokenIds for orderbook, conditionId for history

Presenting Results

Format prices as percentages for readability:

outcomePrices ["0.652", "0.348"] becomes "Yes: 65.2%, No: 34.8%"
Always show the market question and probability
Include volume when available

Example: "Will X happen?" — 65.2% Yes ($1.2M volume)

Parsing Double-Encoded Fields

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

Rate Limits

Generous — unlikely to hit for normal usage:

Gamma: 4,000 requests per 10 seconds (general)
CLOB: 9,000 requests per 10 seconds (general)
Data: 1,000 requests per 10 seconds (general)

Limitations

This skill is read-only — it does not support placing trades
Trading requires wallet-based crypto authentication (EIP-712 signatures)
Some new markets may have empty price history
Geographic restrictions apply to trading but read-only data is globally accessible