Web3 Polymarket

Polymarket integration for prediction market trading on Polygon. Covers authentication (L1 EIP-712, L2 HMAC-SHA256, builder headers), order placement (GTC/GTD/FOK/FAK, batch, post-only, heartbeat), market data (Gamma API, Data API, orderbook, subgraph), WebSocket streaming (market/user/sports channels), CTF operations (split, merge, redeem, negative risk), bridge (deposits, withdrawals, multi-chain), and gasless relayer transactions. Use when building AI agents, autonomous market makers, prediction market UIs, or any application integrating with Polymarket on Polygon.

194 stars 28 forksFinance & Crypto

Install

skills CLI (Claude Code, Cursor, Codex and more)
npx skills add Polymarket/agent-skills --skill web3-polymarket
Manual install
git clone --depth 1 https://github.com/Polymarket/agent-skills.git /tmp/agent-skills
mkdir -p ~/.claude/skills
cp -r /tmp/agent-skills/. ~/.claude/skills/web3-polymarket

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# Polymarket Skill

## When to use this skill

Use this skill when the user asks about or needs to build:
- Polymarket API authentication (L1/L2, API keys, HMAC signing)
- Placing or managing orders (limit, market, GTC, GTD, FOK, FAK, batch, cancel)
- Reading orderbook data (prices, spreads, midpoints, depth)
- Market data fetching (events, markets, by slug, by tag, pagination)
- WebSocket subscriptions (market channel, user channel, sports)
- CTF operations (split, merge, redeem positions)
- Negative risk markets (multi-outcome, conversion, augmented neg risk)
- Bridge operations (deposits, withdrawals, multi-chain)
- Gasless transactions (relayer client, order attribution)
- Builder program integration (order attribution, API keys, tiers)
- Polymarket SDK usage (TypeScript @polymarket/clob-client, Python py-clob-client)

## API Configuration

| API | Base URL | Auth | Purpose |
|-----|----------|------|---------|
| CLOB | `https://clob.polymarket.com` | L2 for trade endpoints | Orderbook, prices, order submission |
| Gamma / Data | `https://gamma-api.polymarket.com` | None | Events, markets, search |
| Data API | `https://data-api.polymarket.com` | None | Trades, positions, user data |
| WebSocket (Market) | `wss://ws-subscriptions-clob.polymarket.com/ws/market` | None | Real-time orderbook |
| WebSocket (User) | `wss://ws-subscriptions-clob.polymarket.com/ws/user` | API creds in message | Trade/order updates |
Read the full skill on GitHub

Details

Skill name
web3-polymarket
Repo updated
19 February 2026

FAQ

What does the Web3 Polymarket skill do?

Polymarket integration for prediction market trading on Polygon. Covers authentication (L1 EIP-712, L2 HMAC-SHA256, builder headers), order placement (GTC/GTD/FOK/FAK, batch, post-only, heartbeat), market data (Gamma API, Data API, orderbook, subgraph), WebSocket streaming (market/user/sports channels), CTF operations (split, merge, redeem, negative risk), bridge (deposits, withdrawals, multi-chain), and gasless relayer transactions. Use when building AI agents, autonomous market makers, prediction market UIs, or any application integrating with Polymarket on Polygon.

How do I install the Web3 Polymarket skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add Polymarket/agent-skills --skill web3-polymarket. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Web3 Polymarket popular?

It lives in Polymarket/agent-skills, which has 194 GitHub stars and 28 forks.

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