Why a ticket-availability monitor is a state machine, not a scraper
A ticket calendar looks like an easy automation target: request a page, search for a date, and send an email when it appears. That implementation works until the first queue, partial response, stale cache or provider outage. Then it can quietly turn "I do not know" into "sold out" — or generate a false alert. I learned this while building MachuPing , an independent monitor for official Machu…
The article discusses the importance of treating ticket availability monitoring as a state machine rather than a simple scraper. The author, MachuPing's creator, explains that this approach helps avoid false alerts and ensures accurate tracking of ticket availability. Three key rules are outlined: unknown status should not be considered unavailable, the user's specific constraints must be matched, and alerts should be triggered only on confirmed transitions, not snapshots.
The author provides a template for representing an availability observation and emphasizes the benefits of this approach for monitoring various types of limited resources, not just tickets.
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