Polymarket & Kalshi Odds

Prediction market odds from Polymarket and Kalshi: implied probabilities, bid/ask, 24h and 7d moves, volume, liquidity/open interest, close time, plus the same question matched across both venues with the spread. No key. One search per call (result caps in the input schema); failed lookups are not charged.

Open endpoint ↗

Price per call: $0.02
Chain: Base
Method: POST
Paid calls · 30 days: 3

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://agent-data.centorprat.workers.dev/tools/polymarket-kalshi-odds", { method: "POST" });
console.log(await res.json());

https://agent-data.centorprat.workers.dev/tools/polymarket-kalshi-odds