Prediction markets · checked Oct 15, 2026

Prediction market bots

Bots, APIs and automation tools for event-contract markets like Kalshi, Polymarket and Gemini Predictions, with who regulates each venue. Every fact links to its source.

Who regulates the venues

In the US, event contracts trade on exchanges the CFTC designates as contract markets (DCMs). Designation doesn’t make a trade safe or profitable, and some states dispute it for sports and elections. Availability depends on where you live; check each platform’s eligibility rules.

Kalshi

KalshiEX LLC

CFTC designated contract market (DCM) since Nov 4, 2020. Source: cftc.gov/PressRoom/PressReleases/8302-20

Mar 4, 2025: Nevada's Gaming Control Board ordered KalshiEX to stop offering sports and election event contracts in Nevada, treating them as unlicensed wagering.

Source: gaming.nv.gov/siteassets/content/about/press-release/NGCB_-_News_Release_

Official API docs

Visit Kalshi ↗ Plain link, no referral code.

Polymarket US

QCX LLC d/b/a Polymarket US

CFTC designated contract market (DCM), designated Jul 9, 2025. On Nov 24, 2025 the CFTC amended the order to allow futures commission merchants to carry customer accounts. Source: cftc.gov/IndustryOversight/IndustryFilings/TradingOrganizations/4957

Jan 3, 2022: per the CFTC, Blockratize Inc. d/b/a Polymarket settled charges of offering unregistered off-exchange event-based binary options; $1.4M penalty and wind-down of non-compliant markets.

Source: cftc.gov/PressRoom/PressReleases/8478-22

Official API docs

Visit Polymarket US ↗ Plain link, no referral code.

Gemini Predictions

Gemini Titan, LLC (a Gemini affiliate)

CFTC designated contract market (DCM), designated Dec 10, 2025. Source: cftc.gov/IndustryOversight/IndustryFilings/TradingOrganizations/4447

Official API docs

Open a Gemini account ↗ Referral link

Per Gemini's referral terms (dated Jan 20, 2026), new US users who verify their ID and trade at least $100 within 30 days get $50, and so does the referrer. Gemini can change or end the offer at any time; availability depends on your jurisdiction. Referral terms

Bots and tools (13)

Each has a rule-based report card built only from sourced facts. Payouts never change a report card.

CloddsBotPrediction market bots

Open-source AI trading agent covering prediction markets and crypto, with copy trading, arbitrage detection and DCA bots.
Free (open source).

Clear record
Gemini Predictions APIPrediction market bots

Gemini's prediction markets, with an official Prediction Markets REST API and WebSocket feeds for automated trading.
Not verified yet

Caution
Kalshi AI Trading BotPrediction market bots

Open-source toolkit for building and measuring LLM-driven strategies on Kalshi, with an API client, dashboard and MCP server.
Free (open source).

Clear record
Kalshi APIPrediction market bots

Kalshi's official exchange API (REST, WebSocket and FIX) for automated trading of event contracts, with a demo environment.
Not verified yet

Caution
Nothing Ever Happens (Polymarket bot)Prediction market bots

Small open-source Python bot that buys “No” on standalone non-sports Polymarket markets. Its README says it is for entertainment only.
Free (public domain).

Clear record
OctoBot Prediction MarketPrediction market bots

Free Polymarket bot built on OctoBot: copy trading of Polymarket profiles, arbitrage strategies and paper trading. Kalshi support is listed as upcoming.
Free (open source).

Clear record
Oracle3 prediction market agentPrediction market bots

Open-source trading engine and MCP server for prediction markets that looks for fee-adjusted opportunities.
Free (open source).

Clear record
pmxtPrediction market bots

Open-source unified API (“CCXT for prediction markets”) for trading on Polymarket, Kalshi and others; a building block for bots.
Free (open source).

Clear record
poly-makerPrediction market bots

Open-source maker-only market-making bot for the Polymarket order book. Its README warns that market making can lose money.
Free (open source).

Clear record
Polymarket AgentsPrediction market bots

Polymarket's open-source framework for AI agents that trade on Polymarket. The repository is archived.
Free (open source).

Closed
Polymarket API (CLOB)Prediction market bots

Polymarket's official developer APIs and SDKs for market data and placing orders on its order book.
Taker fees on some markets, set by the protocol (formula fee = C × feeRate × p × (1 − p)); makers pay no fees; geopolitical and world-events markets are fee-free.

Caution
Polymarket py-clob-clientPrediction market bots

Polymarket's official Python client for its order book, used by many bots. The repository is archived; Polymarket's docs now point to newer SDKs.
Free (open source).

Closed
Prediction Markets Trading Bot ToolkitsPrediction market bots

Open-source Rust bots for prediction markets (Polymarket, Kalshi, Limitless), including copy trading.
Free (open source).

Clear record

The CFTC warns that AI trading bots promising high or guaranteed returns are a common fraud pitch. Source: cftc.gov/LearnAndProtect/AdvisoriesAndArticles/AITradingBots.html

Open-source bots are listed for what their code and README say. We haven’t run them, and their authors’ descriptions are not verified results. Market making and arbitrage can lose money. Not investment advice. How report cards work · Disclosure