5 Open-Source Polymarket GitHub Repos Developers Are Forking in 2026 (Plus the Official CLOB Clients)

#opensource #python #typescript #chainlink

TL;DR

Prediction-market automation is having a GitHub moment: arbitrage-style bots, Rust trading skeletons, market-making keepers, and “24/7” runners plus oracle-lag-sniper, which has been trending for spelling out a Chainlink oracle vs. CLOB repricing angle on short crypto markets. This post lists five representative repositories (with a deeper section on #2) and the two official Polymarket CLOB clients—for learning and code reading, not as a promise of profit.

Disclaimer: Educational only. Not financial or legal advice. Running third-party trading code with real funds is dangerous; audit everything, and comply with Polymarket’s terms and your jurisdiction.

Why the official clients matter

Before you evaluate any “bot,” know what a minimal correct integration looks like:

Stack	Repo
Python	github.com/Polymarket/py-clob-client
TypeScript	github.com/polymarket/clob-client

If a bot repo hand-waves authentication, signing, or order lifecycle, compare it line-by-line against these.

1. apechurch / polymarket-arbitrage-trading-bot

Link: github.com/apechurch/polymarket-arbitrage-trading-bot

Language: TypeScript

Why devs open it: Study patterns for WebSockets, order placement, and short-horizon market logic (exact strategy = read the README and code).

2. JonathanPetersonn / oracle-lag-sniper (trending; deeper dive)

Link: github.com/JonathanPetersonn/oracle-lag-sniper

What it claims to do: Per the repository description, an automated trading system that tries to exploit latency between Chainlink oracle updates and Polymarket CLOB repricing, with scope on 15-minute BTC, ETH, XRP, and SOL markets.

Why this one deserves more than a bullet: It states a testable systems thesis—not just “buy when cheap.” You can reason about oracle round timing, network propagation, when the CLOB’s implied probability should jump, and how quickly market makers lean on the same data. That maps cleanly to skills backend and trading engineers already care about: low-latency observation, idempotent order submission, and risk limits when your edge is measured in moments.

Reality check: Any public “lag” strategy is a candidate for instant crowding. Treat profitability claims as unverified until you model fees, slippage, and adversarial speed. The value for most readers is architecture and instrumentation, not copy-paste deployment.

3. PolybaseX / Polymarket-Trading-Bot-Rust

Link: github.com/PolybaseX/Polymarket-Trading-Bot-Rust

Language: Rust

Why devs open it: Structure and performance-minded layout—useful even if you port ideas to another language.

4. dotdrinker / polymarket-auto-trader

Link: github.com/dotdrinker/polymarket-auto-trader

Why devs open it: Framed as long-running automation—the interesting engineering is often reliability, state, and risk limits, not the headline.