> I'm not sure about that. An address makes no promises (technically speaking) about what you will find at that address.

I don't see how that's relevant. An address, in principle, merely designates a particular location, perhaps physical like a street address, or logical like a memory address. In the context of a search or lookup, you can obtain what's contained at that address.

Similarly, a URL designates a particular resource location, as exemplified by its full name, Uniform Resource Locator. In the context of a client/server request, you can similarly obtain a representation of what's at a URL.