Monitor any webpage for content changes, cron-friendly, no false positives from ads — https://quantumproxies.io/extract-api

page-change-monitor.py

# Watch any webpage for content changes (pricing pages, docs, ToS, competitors).
# Extracts CONTENT as markdown before hashing, so ads/timestamps/session junk
# don't cause false positives like raw-HTML diffing does.
#
# Extraction: https://quantumproxies.io/extract-api (key: app.quantumproxies.io/api-keys)
#
#   QP_API_KEY=qp_live_... python page-change-monitor.py https://example.com/pricing
#   (cron it hourly; exit code 1 = page changed, so `&& notify` just works)

import hashlib, json, os, pathlib, sys
import requests

URL = sys.argv[1] if len(sys.argv) > 1 else "https://example.com"
STATE = pathlib.Path(".page-monitor.json")

r = requests.post(
    "https://app.quantumproxies.io/api/v1/scraper/extract",
    headers={"Authorization": f"Bearer {os.environ['QP_API_KEY']}"},
    json={"url": URL, "format": "markdown"},
    timeout=120,
)
r.raise_for_status()
content = r.json()["content"]
digest = hashlib.sha256(content.encode()).hexdigest()

state = json.loads(STATE.read_text()) if STATE.exists() else {}
old = state.get(URL)

state[URL] = digest
STATE.write_text(json.dumps(state, indent=2))

if old is None:
    print(f"baseline stored for {URL}")
elif old == digest:
    print("unchanged")
else:
    print(f"CHANGED: {URL}")
    sys.exit(1)          # non-zero so cron/CI can trigger an alert