SiteCheck Crypto & Finance

Kalshi (US regulated prediction exchange) open events and their markets: event title, category, series, and per market the question, yes/no bid and ask, last price (= implied probability), 24h and total volume, open interest, close time and rules. Filter by series ticker (e.g. KXFED, KXBTC) or category text. From Kalshi's official public market-data API via a proxy; prices in USD per $1 contract.

Open endpoint ↗

Price per call: $0.002
Chain: Base
Method: GET
Paid calls · 30 days: 2

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://api.chainmarket-api.workers.dev/api/finance/kalshi-prediction-markets", { method: "GET" });
console.log(await res.json());

https://api.chainmarket-api.workers.dev/api/finance/kalshi-prediction-markets