Prediction market book

Get the highest 24h-volume Polymarket and Kalshi markets, each with volume, bid, and ask. Pass ?q= to keep markets that share a word, or omit q for the liquid board. $0.01 USDC. Included in the hour pass. Includes a signed Ed25519 receipt you can check with the published key.

Open endpoint ↗

Price per call: $0.01
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://aizamon.com/x402/v1/book", { method: "GET" });
console.log(await res.json());

https://aizamon.com/x402/v1/book