A prenup in Indonesia is very useful if your wife would like to own property in her country in the future. The prenup would need to be written in Bahasa Indonesia, signed before a notary and then filed with the relevant authorities before the marriage. A valid prenup 'works' in Indonesia in that it is enforceable according to its terms. An Indonesian notary can handle all aspects of this exercise for you.
Regarding US law, you should consult a US lawyer, who will probably have you sign a separate prenup for your US assets that would meet the legal requirements of your state of residence. Personally, I would not rely on a prenup prepared under Indonesian law to apply in a US divorce court. You will also have to ask your US lawyer about whether prenups of the type you envision (e.g., waiving financial support) are generally enforceable in your state.