The blog post describes how Cloudflare used their developer tools, D1andQueues, to build an open-source SEO tool called Prospector.
Prospector allows Cloudflare's SEO experts to monitor their blog and marketing site for specific keywords and receive notifications via email when a keyword is matched on a page. The tool uses Cloudflare Workers as the user-facing API, D1 to store and retrieve data in real-time, and Queues to handle the fetching of all URLs and the notification process.
The blog post also highlights the use of Hono, an Express-style API for Workers, to quickly map out a REST API in just a few lines of code, and the improved TypeScript bindings for Workers, which make it easy to define the types for environment variables and use them in the application.
















