One call tells your site who’s reading it.

const geo = await fetch(
  "https://api.instantgeo.info/v1/geo?key=ig_pk_yourkey"
).then(r => r.json())

document.documentElement.lang = geo.languages[0]

const geo = await fetch("https://api.instantgeo.info/v1/geo", {
  headers: { authorization: `Bearer ${process.env.INSTANTGEO_KEY}` }
}).then(r => r.json())

import os, requests

geo = requests.get(
    "https://api.instantgeo.info/v1/geo",
    headers={"authorization": f"Bearer {os.environ['INSTANTGEO_KEY']}"},
).json()

$geo = json_decode(file_get_contents(
  'https://api.instantgeo.info/v1/geo',
  false,
  stream_context_create(['http' => ['header' =>
    'authorization: Bearer ' . getenv('INSTANTGEO_KEY')]])
), true);

curl https://api.instantgeo.info/v1/geo \
  -H "authorization: Bearer $INSTANTGEO_KEY"