International 

Does Xfers offer international services?
We do have an Xfers Indonesia (https://sandbox-id.xfers.com/). This is completely independent from Xfers Singapore, so you can't do transfers across the two.
How will using the API services be different for different countries? 
They are mostly the same, except that endpoints are different: https://docs.xfers.io/#apis-endpoints

Due to interbank transfer charges for Indonesia, Xfers offers the user a choice of different banks to top up. Right now we offer transfers to BCA, Mandiri and Permata. You can view it in https://sandbox-id.xfers.com/transfer_in.

For withdrawals, you can withdraw to 6 banks as of now: BCA, MANDIRI, BNI, BRI, CIMB, PERMATA.