Should i have a special license for this type of business? If yes what is it?

Yes, you will require a federal license to legally operate this business. The business you are describing is classified by the Federal Maritime Commission ("FMC") as a non-vessel operating common carrier ("NVOCC") or ocean transportation intermediary ("OTI"). The FMC has very strict licensing requirements for this business if you intend to export or import from or to a United States maritime port. Also, there are various licenses issued by the FMC depending on the scope of your involvement. For example, a different license is issued depending on whether you simply want to act as a "broker" in arranging transportation or whether you actually want to issue "house bills of lading" where you can charge actual ocean carriage charges and then book the transportation with an actual shipowner/carrier. In any event, the FMC will conduct an investigation into your experience and knowledge of this industry and will require that you post a bond and publish a tariff setting forth your terms and conditions of service.