[3] As a scholar he was noted for his productivity and received praises from individuals such as Ulrich von Wilamowitz-Moellendorff for his work on classical philology.

He also had a notable friendship with President Woodrow Wilson, which helped him gain international prominence, aided even more so by his role as the editor of the first volumes of the Loeb Classical Library.

[2][4] Capps would also make a name for himself serving on the managing committee of the American School of Classical Studies at Athens (ASCSA) from 1908 to 1950, during which he acted as chair between 1919 and 1939.

[7] Capps also served as Envoy Extraordinary and Minister Plenipotentiary to both Greece and Montenegro on behalf of the United States in 1920 at the behest of his friend President Wilson.

Using his position as the American Red Cross Commissioner to Greece and his rank as a colonel, his efforts would see success and result in the Greek government awarding him both the Order of the Redeemer and the Medal of Military Merit.