Polymarket

OrganizationPopular

NousResearch

polymarket

Query Polymarket: markets, prices, orderbooks, history.

Overview

Publisher	NousResearch
Repository	`hermes-agent`
Skill name	`polymarket`
Stars	250.4K
Forks	53.5K
Bundled files	2
License	MIT
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
2 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by NousResearch on GitHub. Read the source before you install it.

Installation

Install the Polymarket AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/NousResearch/hermes-agent/tree/main/optional-skills/finance/polymarket
Enable the skill in any chat where you want it available.

Store

Installed

Skills

Add skills

Import one or more skills from a public GitHub folder or a local .skill or .zip archive, or SKILL.md file.

From GitHub URLFrom .skill, .zip, or SKILL.md

GitHub repo or folder

https://github.com/NousResearch/hermes-agent/tree/main/optional-skills/finance/polymarket

Points to a single skill folder, or any folder that contains multiple skills. Public repos only.

CancelContinue

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/NousResearch/hermes-agent.git /tmp/hermes-agent
mkdir -p .claude/skills
cp -r /tmp/hermes-agent/optional-skills/finance/polymarket .claude/skills/polymarket

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Polymarket in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Polymarket on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Polymarket is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

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

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

references/api-endpoints.md4 KB
scripts/polymarket.py10 KB

Frequently asked questions

What does the Polymarket AI skill do?

Query Polymarket: markets, prices, orderbooks, history.

Why use Polymarket on TypingMind?

Because you install it once and use it with any model. Polymarket is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Polymarket in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/NousResearch/hermes-agent/tree/main/optional-skills/finance/polymarket. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Polymarket?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Polymarket?

As many as you like. As long as a model supports skills, you can use Polymarket with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Polymarket AI skill free?

Yes. It is published on GitHub by NousResearch under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Polymarket — Prediction Market Data

When to Use

Key Concepts

Three Public APIs

Typical Workflow

Presenting Results

Parsing Double-Encoded Fields

Rate Limits

Limitations

Bundled files

Frequently asked questions

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