01
Relevant changes only
Prices, availability, text and sections are extracted deterministically. Copyright years, timestamps, ads, session tokens and reordering do not create events.
Machine-first page monitoring
Watch one page for one change.
Give Page Change a public URL and what to watch — a price, stock status, a sentence, a section, a list. It records a baseline, rechecks on a schedule you prepay, ignores page noise, and returns structured change events with the original evidence, in any language.
{
"url": "https://shop.example.jp/item/42",
"what_to_watch": "Сообщи, когда появится в наличии",
"change_type": "BECOMES_AVAILABLE",
"frequency": "12h",
"max_checks": 28,
"preferred_output_language": "ru"
}change event · condition met
«在庫切れ» → «在庫あり»
Наличие изменилось. Evidence kept in the original Japanese.
BASELINESCHEDULED CHECKDETERMINISTIC DIFFSTRUCTURED EVENT
02
Funded, then finished
You buy a fixed number of checks. When they run out, the window ends or your condition is met, monitoring stops. No open-ended subscription, no hidden future charges.
03
Global by default
Japanese, Cyrillic, accented Latin, mixed pages. Source evidence stays in its original language; the explanation can be in yours.
Conditions are code, not guesses.
PRICE_BELOW, BECOMES_AVAILABLE, TEXT_APPEARS, ITEM_ADDED and others are evaluated with plain comparisons. A model is used only to pick among real candidates when a page is ambiguous — never to invent a value.