Get alerted when Google changes my business listing

import json
from clickruntime import on_trigger, credentials, http, notify, state

LOCATION = "locations/9876543210"  # Rosa's Bakery
FIELDS = "regularHours,phoneNumbers,storefrontAddress,websiteUri,categories,title"

@on_trigger
def run(event):
    resp = http.get(f"https://mybusinessbusinessinformation.googleapis.com/v1/{LOCATION}:getGoogleUpdated",
                    params={"readMask": FIELDS},
                    headers={"Authorization": f"Bearer {credentials.connection('google', 'work')}"})
    resp.raise_for_status()
    data = resp.json()
    changed = [f for f in (data.get("diffMask") or "").split(",") if f]
    key = json.dumps({f: data["location"].get(f) for f in changed}, sort_keys=True)
    if not changed or key == state.get("last"):
        if not changed:
            state.set("last", None)
        return {"changed": 0}
    lines = []
    for f in changed:
        value = data["location"].get(f)
        if f == "regularHours":
            value = ", ".join(f"{p['openDay'].title()} {p.get('openTime', {}).get('hours', 0):02d}:00"
                              for p in (value or {}).get("periods", [])) or "closed"
        lines.append(f"- {f} → {value}")
    notify.email_me(f"Google changed {len(changed)} field{'s' if len(changed) > 1 else ''} on your listing",
                    "Google has updated your listing:\n" + "\n".join(lines) +
                    "\n\nIf these are wrong, edit them in your Business Profile to restore your details.")
    state.set("last", key)
    return {"changed": len(changed)}