Subastas Tesoro Eeuu Pago

{
  "fuente": "U.S. Treasury Fiscal Data (dominio público)",
  "proximas": false,
  "subastas": [
    {
      "bid_to_cover": 2.83,
      "cupon_pct": null,
      "cusip": "912797VP9",
      "fecha_subasta": "2026-10-01",
      "importe_ofrecido_usd": 100000000000,
      "plazo": "4-Week",
      "tipo": "Bill",
      "tipo_adjudicado_pct": 3.956,
      "vencimiento": "2026-11-03"
    },
    {
      "bid_to_cover": 2.7,
      "cupon_pct": null,
      "cusip": "912797VZ7",
      "fecha_subasta": "2026-10-01",
      "importe_ofrecido_usd": 95000000000,
      "plazo": "8-Week",
      "tipo": "Bill",
      "tipo_adjudicado_pct": 4.071,
      "vencimiento": "2026-12-01"
    },
    {
      "bid_to_cover": 2.89,
      "cupon_pct": null,
      "cusip": "912797WS2",
      "fecha_subasta": "2026-09-30",
      "importe_ofrecido_usd": 75000000000,
      "plazo": "17-Week",
      "tipo": "Bill",
      "tipo_adjudicado_pct": 4.23,
      "vencimiento": "2027-02-02"
    },
    {
      "bid_to_cover": 3.07,
      "cupon_pct": null,
      "cusip": "912797WJ2",
      "fecha_subasta": "2026-09-29",
      "importe_ofrecido_usd": 54000000000,
      "plazo": "52-Week",
      "tipo": "Bill",
      "tipo_adjudicado_pct": 4.616,
      "vencimiento": "2027-09-30"
    },
    {
      "bid_to_cover": 2.82,
      "cupon_pct": null,
      "cusip": "912797UY1",
      "fecha_subasta": "2026-09-29",
      "importe_ofrecido_usd": 85000000000,
      "plazo": "6-Week",
      "tipo": "Bill",
      "tipo_adjudicado_pct": 4.044,
      "vencimiento": "2026-11-12"
    }
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.vextorium.com/subastas-tesoro-eeuu-pago' \
  -H 'content-type: application/json' \
  --data-raw '{"limite":5}'

# 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/subastas-tesoro-eeuu-pago' \
  -H 'content-type: application/json' \
  --data-raw '{"limite":5}' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fsubastas-tesoro-eeuu-pago&method=POST
const res = await pay("https://api.vextorium.com/subastas-tesoro-eeuu-pago", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "limite": 5
  }),
});
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
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/subastas-tesoro-eeuu-pago",
        json={
            "limite": 5,
        },
    )
    print(res.status_code, res.text)