In May 2008 Webb played in his debut test for the Australian national team against New Zealand. On 20 May 2008 Webb re-signed with the Cowboys until the end of the 2010 season, a contract rumoured to be worth around A$300,000 a year. He was named in the Australia training squad for the 2008 Rugby League World Cup, but was not selected to play. He played for the Prime Minister's XIII against Papua New Guinea in the post season and also appeared aat the World Cup's opening night for the Indigenous Australian team in a match against the New Zealand Maori team.