GST on Commission Received from Foreign Company

Dear Sir/Madam,

I am overseas education consultant. Many students are studying in foreign university for higher education. I organize the courses from university to students. In this case universities are paying fixed commission to me without GST.

Receipent outside India. Services provided Outside India. I am in India. Commission received in foreign currency.

In this case I am liable to pay IGST @ 18% or not.

Kindly advice.

Thanks