Latam Fx

{
  "completo": true,
  "descripcion": "Tipos de cambio oficiales de LATAM contra USD, en una sola llamada",
  "monedas": {
    "ARS": {
      "blue": 1513.5,
      "brecha_pct": 2.5,
      "fuente": "Bluelytics",
      "oficial": 1476.5
    },
    "BRL": {
      "fuente": "BCB",
      "tipo": "PTAX venta",
      "valor": 5.0894
    },
    "CLP": {
      "fuente": "Banco Central de Chile",
      "tipo": "dólar observado",
      "valor": 933.15
    },
    "COP": {
      "fuente": "datos.gov.co",
      "tipo": "TRM legal",
      "valor": 3262.58
    },
    "MXN": {
      "fuente": "Banxico",
      "tipo": "FIX oficial",
      "valor": 18.61
    },
    "PEN": {
      "fuente": "BCRP",
      "tipo": "SBS venta",
      "valor": 3.396
    }
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://toolrail.dev/latam/fx'

# 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 - 'https://toolrail.dev/latam/fx' \
  | 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 $0.015 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.015" });
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 $0.015 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftoolrail.dev%2Flatam%2Ffx
const res = await pay("https://toolrail.dev/latam/fx");
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 $0.015 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.015"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://toolrail.dev/latam/fx")
    print(res.status_code, res.text)