How does the MongoDB Data API work from a high-level perspective?

MongoDB Atlas App Services & Realm
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I recently implemented a quick POC using Cloudflare Workers as the backend of a web app and had to connect it to a MongoDB Atlas cluster. Cloudflare Workers currently supports HTTP and WebSockets but not plain TCP sockets. For this reason, as @MaBeuLux88_xxx points out, the MongoDB Node driver is not supported. That being said, Cloudflare seems to be working on this limitation. Some workarounds to connect to a MongoDB cluster from Cloudflare Workers include:

  1. Using the Realm client SDK (as explained in the blog post).
  2. Using a database proxy (like Prisma).

When using Realm, it seems that the blog implementation does not create a new connection with each request. This post suggests that Realm manages connections to Atlas automatically, depending on the requests made by client endpoints.