On 30 April 1905, Beeuwkes played for the Netherlands in its first international game, when it won 4:1 against Belgium in an away game at Antwerp.
Until 1910 he remained goalkeeper for the national team, contributing considerably to its development as one of the strongest European teams of the period. The high point of his career was playing for the Netherlands in the 1908 Summer Olympics, that included football for the first time. After Hungary and Bohemia withdrew their teams, the Netherlands reached the semi-final uncontested, when it lost 4:0 to the later winners, England. However, it received a bronze medal for its 2:0 win against Sweden. He was known for his punching of the ball instead of catching it and for playing in the exact same kit as the outfield players.