My Mastra Agent Found a Production Bug in Five Minutes

The author built a Mastra-based AI workflow via Telegram that monitors Cloudflare Workers sites by querying Cloudflare's GraphQL Analytics API and sending alerts. Within five minutes, it detected scriptThrewException errors caused by bots hitting API routes—errors that a traditional uptime monitor missed because it only checked cached static pages. The entire setup runs locally, costs nothing, and was built in about two hours.