Free, copy-paste build recipes for Kalshi and Polymarket US bots. Paste the prompt into Claude Code, Cursor, ChatGPT or Grok, build it in paper mode, and ship it with a safety pack that keeps your keys and your balance where they belong.
A copy-paste AI prompt and step-by-step guide to the Polymarket US API: public market data with no key, then authenticated reads. Includes the international Gamma API, read-only, with a geoblock check.
Step-by-step: use Claude Code to build a Polymarket US trading bot that runs in paper mode by default, with a local paper ledger, order preview, hard position limits and a kill switch.
Get started with the Kalshi API using an AI coding tool: public market data with no key, then RSA-PSS or Ed25519 signed requests against the Kalshi demo environment. Endpoints checked against the official docs.
Use an AI coding tool to build your own Kalshi trading bot that runs on the Kalshi demo environment first, with order groups, reduce-only exits, a kill switch and optional LLM-assisted research that never sees your keys.
An honest guide to building a trading bot with Claude, Claude Code or Claude AI: where it helps, where it fails, and a safe Kalshi-demo starter prompt with a rules file, deny settings, limits and a kill switch.
Build a personal alert monitor that compares prices for the same event on Kalshi and Polymarket US and flags gaps after fees. Alerts only, no auto-trading, with an honest look at why most "arbitrage bots" don't work.
What you'll have at the end, and whether it's the right recipe for you.
One block you paste into your AI coding tool. It bakes in paper mode, caps and a kill switch.
Plain-English steps from empty folder to a running bot, with the official endpoints.
Kalshi demo or a local paper ledger first. Real money only after clean logs.
Key handling, position limits and a kill switch, on every single recipe.
Links straight to Kalshi and Polymarket US docs, checked Oct 19, 2026.
CFTC-regulated US exchange for event contracts. Has a full demo environment with mock funds, so every Kalshi recipe starts there.
Polymarket US is the CFTC-regulated, USD-based exchange for US residents (separate from international Polymarket, which is close-only for the US). Public market data needs no key.
Recipes in the oven. We are checking the US-eligibility picture before publishing anything.
Wallet trackers, alert bots and devnet-first trading recipes are coming next.
One new build recipe, one safety tip, and API changes worth knowing about. Free. No picks, ever.