“This serves as a quick reference to verifying resource availabilities in Espresso”

Question

What is the correct way of expressing the following sentence?

This serves as a quick reference to verifying resource availabilities in Espresso.
This serves as a quick reference to verify resource availabilities in Espresso.

Answer 1

Is it a reference to ways that you could verify resource availability? In that case, the first is preferable, but you may want to clarify that:

This is a quick reference to methods for verifying resource availability in Espresso.

Otherwise, what @Thursagen said.

Answer 2

I would say it's the second one:

This serves as a quick reference to verify resource availabilities in Espresso.

If you were to use the first option, I would change "to" to "for".

This serves as a quick reference for verifying resource availabilities in Espresso.

Edit:

Or as Karl states below, one could always try the alternative:

This serves as a quick check to verify availability of resources in Espresso.

This alternative is to make the meaning and intent clearer.