Check an EORI number with Python’s standard library

One request, with a 20-second timeout

A key is required before the request is sent. HTTP, network and unreadable-response errors stop the script without recording an invalid EORI.

# Python 3 · standard library only; run on your server.
# Set EORI_API_KEY privately in your environment first.
import json
import os
from urllib.error import HTTPError, URLError
from urllib.request import Request, urlopen

key = os.environ.get("EORI_API_KEY")
if not key:
    raise SystemExit("Set EORI_API_KEY first")
request = Request(
    "https://eoricheck.com/v1/eori?number=IT00159560366",
    headers={"Authorization": f"Bearer {key}"},
)
try:
    with urlopen(request, timeout=20) as response:
        result = json.load(response)
except HTTPError as error:
    retry = error.headers.get("Retry-After", "not supplied")
    raise SystemExit(
        f"HTTP {error.code}; no validity decision. Retry-After: {retry}"
    ) from None
except (URLError, TimeoutError, OSError):
    raise SystemExit("Network failure; no validity decision") from None
except (ValueError, UnicodeError):
    raise SystemExit("Unreadable response; no validity decision") from None

if not isinstance(result, dict) or result.get("estado") not in (
    "valido", "no_valido"
):
    raise SystemExit("No validity decision; review or retry later")
print(result["estado"], result.get("fuente"), result.get("checked_at"))

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