EventArb vs Polymarket Bot Skill
EventArb and Polymarket Bot Skill are both filed under Arbitrage. EventArb is a trading platform that is free; Polymarket Bot Skill is an automated bot that is free. Below: the facts side by side, where the two actually differ, and when each one is the better pick.
Free cross-platform arbitrage calculator for event contracts.
Compared with Polymarket Bot Skill
Claude Code skill that turns an AI coding agent into a Polymarket bot builder.
Compared with EventArbAt a glance
| Fact | EventArb | Polymarket Bot Skill |
|---|---|---|
| Type | Trading platform | Automated bot |
| Category | Arbitrage | Arbitrage |
| Also listed in | — | Scalping, Sniping |
| Pricing | Free | Free |
| Price | free | free |
| Risk rating | Low risk | High risk |
| Markets | Polymarket, Kalshi, Robinhood | Any Polymarket market, Gamma API, CLOB API |
| Source | Source not published | Source not published |
| Runs in Telegram | No | No |
| Listed since | Aug 26, 2026 | Jul 14, 2026 |
Highlighted rows differ
Key differences
- Polymarket Bot Skill is an automated bot that places orders for you; EventArb is a manual platform — you decide every trade.
- They cover different markets: EventArb lists Polymarket and Kalshi and 1 more, Polymarket Bot Skill lists Any Polymarket market and Gamma API and 1 more.
- EventArb is rated low risk, Polymarket Bot Skill high risk.
- Only Polymarket Bot Skill is filed under Scalping and Sniping.
Choose EventArb if…
- you want to stay in control of every order
- you trade Polymarket and Kalshi and 1 more
- you prefer the lower-risk profile (low vs high)
Choose Polymarket Bot Skill if…
- you want the trading automated rather than done by hand
- you trade Any Polymarket market and Gamma API and 1 more
- your focus is Scalping and Sniping
What EventArb does
Free cross-platform arbitrage calculator for event contracts. Punch in YES/NO prices for the same event on Polymarket, Kalshi or Robinhood and it does the math each venue's fee schedule implies — whether buying opposite sides locks in a profit, what the spread nets after fees, and the opportunity cost of parking capital until resolution. Supports binary and multiple-choice markets, side-by-side venue comparison, shareable links and free email notifications when opportunities open.
Features- Fee-aware arbitrage math for Polymarket, Kalshi and Robinhood
- Binary and multiple-choice market modes
- Opportunity-cost model over the contract length
- Side-by-side comparison across venues
- Shareable calculation links
- Enter the same market's YES/NO prices as listed on each venue.
- It nets out each platform's fees and flags when buying opposite sides locks in more than they cost.
- Weighs the locked spread against the opportunity cost of capital for the contract's duration.
What Polymarket Bot Skill does
Claude Code skill that turns an AI coding agent into a Polymarket bot builder. Ships modular Python scripts for the Gamma and CLOB APIs — market research, price monitoring, arbitrage detection and trade execution — with built-in auth, key derivation and rate-limit handling. Installs into Claude Code, Cowork, Codex and other agents.
Features- Modular Python scripts for trade execution & testing
- Automated data fetching from the Gamma & CLOB APIs
- Real-time price monitoring & arbitrage strategy logic
- Secure authentication & API-key derivation scripts
- Guides for rate-limit handling and security
- Fetches live market data from Polymarket's Gamma and CLOB APIs.
- Monitors prices in real time and flags arbitrage across correlated markets.
- Executes and tests trades through modular, auditable Python scripts.
More head-to-heads
Every fact on this page is taken from the two listings as their authors publish them; POLBOTS verifies neither performance nor claims and has no stake in either tool. Nothing here is financial advice.