diff --git a/lib.py b/lib.py
new file mode 100644
index 0000000..d384703
--- /dev/null
+++ b/lib.py
@@ -0,0 +1,147 @@
+import os
+import logging
+from datetime import datetime
+from zoneinfo import ZoneInfo
+from functools import wraps
+from flask import request, Response
+from models import Plext
+
+# Timezone configuration
+TIMEZONE = ZoneInfo("Europe/Rome")
+
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO, format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
+)
+logger = logging.getLogger(__name__)
+
+
+def check_basic_auth(username: str, password: str) -> bool:
+    """
+    Check if the provided username and password match the configured credentials.
+
+    Args:
+        username: Username from the request
+        password: Password from the request
+
+    Returns:
+        True if credentials match, False otherwise
+    """
+    expected_username = os.getenv("BASIC_AUTH_USER")
+    expected_password = os.getenv("BASIC_AUTH_PASSWORD")
+
+    if not expected_username or not expected_password:
+        logger.warning("BASIC_AUTH_USER or BASIC_AUTH_PASSWORD not configured")
+        return False
+
+    return username == expected_username and password == expected_password
+
+
+def basic_auth_required(f):
+    """
+    Decorator to require basic authentication for an endpoint.
+
+    Returns:
+        401 Unauthorized if authentication fails or is missing
+    """
+
+    @wraps(f)
+    def decorated(*args, **kwargs):
+        auth = request.authorization
+
+        if not auth or not check_basic_auth(auth.username, auth.password):
+            return Response(
+                "Could not verify your access level for that URL.\n"
+                "You have to login with proper credentials",
+                401,
+                {"WWW-Authenticate": 'Basic realm="Login Required"'},
+            )
+
+        return f(*args, **kwargs)
+
+    return decorated
+
+
+def parse_timestamp(value: str) -> int:
+    """
+    Parse timestamp from either milliseconds (int) or ISO 8601 string.
+
+    Args:
+        value: Either integer milliseconds or ISO 8601 string
+
+    Returns:
+        Timestamp in milliseconds since epoch
+
+    Raises:
+        ValueError: If format is invalid
+    """
+    # Try parsing as integer (milliseconds)
+    try:
+        return int(value)
+    except ValueError:
+        pass
+
+    # Try parsing as ISO 8601 datetime
+    try:
+        # Handle 'Z' suffix (UTC)
+        iso_value = value.replace("Z", "+00:00")
+
+        # Handle timezone offset without colon (e.g., +0100 -> +01:00)
+        # Match pattern like +0100 or -0100 at the end of the string
+        import re
+
+        match = re.search(r"([+-])(\d{2})(\d{2})$", iso_value)
+        if match:
+            sign, hours, minutes = match.groups()
+            iso_value = re.sub(
+                r"([+-])(\d{2})(\d{2})$", f"{sign}{hours}:{minutes}", iso_value
+            )
+
+        dt = datetime.fromisoformat(iso_value)
+        return int(dt.timestamp() * 1000)
+    except ValueError:
+        raise ValueError(
+            f"Invalid timestamp format: {value}. "
+            "Use milliseconds (e.g., 1736659200000) or "
+            "ISO 8601 format (e.g., '2026-01-12T10:00:00Z' or '2026-01-12T10:00:00+01:00')"
+        )
+
+
+def plext_to_dict(plext: Plext) -> dict:
+    """
+    Convert a Plext object to a dictionary for JSON serialization.
+
+    Args:
+        plext: Plext object to convert
+
+    Returns:
+        Dictionary representation of the plext
+    """
+    coords = plext.get_event_coordinates()
+    # Convert timestamp from milliseconds to datetime in Europe/Rome timezone
+    dt = datetime.fromtimestamp(plext.timestamp / 1000.0, tz=TIMEZONE)
+    return {
+        "id": plext.id,
+        "timestamp": plext.timestamp,
+        "timestamp_formatted": dt.strftime("%Y-%m-%d %H:%M:%S"),
+        "text": plext.text,
+        "team": plext.team,
+        "plext_type": plext.plext_type,
+        "categories": plext.categories,
+        "event_type": plext.get_event_type().name,
+        "player_name": plext.get_player_name(),
+        "portal_name": plext.get_portal_name(),
+        "coordinates": {"lat": coords[0], "lng": coords[1]} if coords else None,
+        "markup": [
+            {
+                "type": m.type,
+                "plain": m.plain,
+                "team": m.team,
+                "name": m.name,
+                "address": m.address,
+                "latE6": m.latE6,
+                "lngE6": m.lngE6,
+            }
+            for m in plext.markup
+        ],
+    }