Polymarket Mercado Pago

{
  "abierto": true,
  "cambio_24h": null,
  "cierre": "2028-11-08T04:59:00Z",
  "descripcion": "This market will resolve to “Yes” if the named individual wins and accepts the 2028 nomination of the Democratic Party for U.S. president. Otherwise, this market will resolve to “No”.\n\nThe resolution source for this market will be a consensus of official Democratic Party sources.\n\nAny replacement of…",
  "enlace": "https://polymarket.com/market/will-oprah-winfrey-win-the-2028-democratic-presidential-nomination",
  "fuente_resolucion": null,
  "id": "559687",
  "inicio": "2025-07-11T18:36:32.333Z",
  "liquidez_usd": 2887065,
  "mejor_compra": null,
  "mejor_venta": 0.001,
  "pregunta": "Will Oprah Winfrey win the 2028 Democratic presidential nomination?",
  "resultados": [
    {
      "opcion": "Yes",
      "probabilidad_pct": 0.05
    },
    {
      "opcion": "No",
      "probabilidad_pct": 99.95
    }
  ],
  "slug": "will-oprah-winfrey-win-the-2028-democratic-presidential-nomination",
  "tokens_clob": [
    "2213957649161627793381994368131485505647723208738124952452819345058597751695",
    "44046525152074436753629616217525652949736205933417533647338274649282385796755"
  ],
  "ultimo_precio": 0.001,
  "volumen_24h_usd": 1050,
  "volumen_total_usd": 54432527
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.vextorium.com/polymarket-mercado-pago' \
  -H 'content-type: application/json' \
  --data-raw '{"slug":"will-oprah-winfrey-win-the-2028-democratic-presidential-nomination"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://api.vextorium.com/polymarket-mercado-pago' \
  -H 'content-type: application/json' \
  --data-raw '{"slug":"will-oprah-winfrey-win-the-2028-democratic-presidential-nomination"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fpolymarket-mercado-pago&method=POST
const res = await pay("https://api.vextorium.com/polymarket-mercado-pago", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "slug": "will-oprah-winfrey-win-the-2028-democratic-presidential-nomination"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.vextorium.com/polymarket-mercado-pago",
        json={
            "slug": "will-oprah-winfrey-win-the-2028-democratic-presidential-nomination",
        },
    )
    print(res.status_code, res.text)