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curl -G "https://api.fxapi.com/v1/latest" \
  -d base_currency=USD \
  -d currencies=EUR,GBP,JPY \
  -H "apikey: $FXAPI_KEY"

const url = new URL("https://api.fxapi.com/v1/latest")
url.search = "base_currency=USD&currencies=EUR,GBP,JPY"

const res = await fetch(url, {
  headers: { apikey: process.env.FXAPI_KEY }
})
const { data } = await res.json()

import os, requests

res = requests.get(
    "https://api.fxapi.com/v1/latest",
    params={"base_currency": "USD", "currencies": "EUR,GBP,JPY"},
    headers={"apikey": os.environ["FXAPI_KEY"]},
)
data = res.json()["data"]

$query = http_build_query([
    "base_currency" => "USD",
    "currencies" => "EUR,GBP,JPY",
]);
$ch = curl_init("https://api.fxapi.com/v1/latest?$query");
curl_setopt_array($ch, [
    CURLOPT_HTTPHEADER => ["apikey: " . getenv("FXAPI_KEY")],
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true)["data"];