v3 api/suggested-fees token parameters

[ScreamingHawk]

The query parameters in Bridge Integration Guide use token.
The query parameters in the API Reference page use inputToken and outputToken.

It seems inputToken and outputToken are both needed to encode the calldata. When using token as per the bridge integration guide, how are we expected to get the outputToken? It doesn't appear there is an API that shows the expected mappings across chains. It would be really handy is such an enpoint was added.