Subvenciones Eeuu Pago

{
  "agencia": null,
  "busqueda": "artificial intelligence",
  "convocatorias": [
    {
      "agencia": "National Institutes of Health",
      "apertura": "10/02/2026",
      "cierre": "05/28/2027",
      "codigo_agencia": "HHS-NIH11",
      "enlace": "https://www.grants.gov/search-results-detail/361050",
      "estado": "posted",
      "numero": "RFA-AI-28-031",
      "titulo": "Centers for Structural Biology of HIV and Other Infectious Diseases (U54 Clinical Trial Not Allowed)"
    },
    {
      "agencia": "U.S. National Science Foundation",
      "apertura": "10/01/2026",
      "cierre": "",
      "codigo_agencia": "NSF",
      "enlace": "https://www.grants.gov/search-results-detail/364017",
      "estado": "posted",
      "numero": "25-546",
      "titulo": "Foundations for Operating the National Artificial Intelligence Research Resource: the NAIRR Operations Center (NAIRR-OC)"
    }
  ],
  "estado": "abiertas",
  "fuente": "Grants.gov (Gobierno de EE. UU., dominio público)",
  "total": 150
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.vextorium.com/subvenciones-eeuu-pago' \
  -H 'content-type: application/json' \
  --data-raw '{"buscar":"artificial intelligence","limite":2}'

# 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/subvenciones-eeuu-pago' \
  -H 'content-type: application/json' \
  --data-raw '{"buscar":"artificial intelligence","limite":2}' \
  | 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%2Fsubvenciones-eeuu-pago&method=POST
const res = await pay("https://api.vextorium.com/subvenciones-eeuu-pago", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "buscar": "artificial intelligence",
    "limite": 2
  }),
});
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/subvenciones-eeuu-pago",
        json={
            "buscar": "artificial intelligence",
            "limite": 2,
        },
    )
    print(res.status_code, res.text)