The Athenians, who had previously regarded Nymphodorus as their enemy, made him their Proxenos in 431 BC, and, through his mediation, obtained the alliance of Sitalces, for which they were anxious, and conferred the freedom of their city on Sadocus, Sitalces' son.
Orang Athena, yang sebelumnya menganggap Nymphodorus sebagai musuh mereka, menjadikannya Proxenia mereka pada tahun 431 SM, dan melalui mediasinya, memperoleh aliansi Sitalkes, yang membuat mereka cemas, dan memberikan kebebasan kepada kota mereka pada Sadocus, putra Sitalkes.