"International Charter Licence" Is there any such thing? - catamaran charter

I am a builder of commercial ships, I am currently under construction on a catamaran of 63 'in a class of best "A" Ocean Design. I thought to use the letters, so I can do something, sailing and still have an income. But I think that any license is limited to a country in which they pick up passengers. Is there a way, a license that is as broad and international as the range of the boat to get?