Multicurrency - Make transaction FX rates available to the API
It seems to calculate values (unrealised gains) for international transactions we need exchange rates.
However after retrieving the rates from XE.com, as well as another provider, we are unable to pull the exact FX values used by Xero, which means we cannot recreate the value from Xero reports. This interferes with our ability to automatically reconcile and may cause confusion for accountants if they cross check.
Xero support advised us that they pull live FX rates at 11pm of the timezone of the organisation, however in general it is not possible to pull these live rates historically from XE.com.
We therefore request that the historical table of FX rates used by Xero be exposed to the API so that we can recreate these calculations through API data.

Hi Brendan, appreciate the detail provided along with your idea here. We have a separate community forum where you can log ideas related to improvements for Xero's API. While they have a few ideas around exchange rates what you've raised doesn't appear to have been requested yet.
We'll close the idea in this forum but you're welcome to copy and paste your detail from this to create a new idea in the forum there where others interested can join and we have experts that can keep you updated of any changes surrounding this. Thanks