Does Fusion provide the budget check API/Interface for third party?

Summary:

Does Fusion provide the budget check API/Interface for third party?

Content (please ensure you mask any confidential information):

We enable the project budget control in Fusion system and Authorization, Payables, Purchase Reuqest and Purchase Order will check and reserve the budget. But we still have some transaction happens in third party. Does Fusion provide the budget check API/Interface for third party? If so, can we call this budget verification interface in real time without import these third party's transaction into Fusion to generate a standard Fusion transaction?

For example, we create a expense report in a third party. When we submit this expense report, we can call the budget verification interface to check the budget is enough or not and this expense report has not been imported into Fusion.