Any non-Arab visitor to Jordan, whether for business or tourism, needs an entry visa. The required fee for a visa in addition to the granted stay duration depends on the visitor's nationality.
Although entrance visas are obtainable at the airport for visitors arriving by airplane, those arriving by land must get a visa prior to arrival. These are obtainable from any Jordanian diplomatic mission abroad, where they generally take a day to be received. Visas cannot be obtained at Jordan's land border crossings.
Visa Form for entring into Jordan: Form