Canada Post plugin

We're looking at creating plugin to support Canada Post's Autocomplete API. See more here: https://www.canadapost-postescanada.ca/ac/support/api/

The trouble is their API uses two methods:

• AddressComplete Interactive Find
• AddressComplete Interactive Retrieve

The first gets some options that match the input string including an id, the second gets us the fully qualified address fields for the id.

We're just looking for some advice or direction about how we could (or if it's possible to) implement this using this Address Suggestion module. Are there any examples of other APIs/plugins that take this approach?

Thanks for any help.