Stephanos of Clypea (now Kelibia, in Tunisia) appears to have served as secretary/scribe of Patriarch Paul II of Constantinople (641–653) against the Monothelites, in 646.
In 648 he backed with his authority the decree of Constans II, known as the typos, which simply forbade all further discussion of the Christological question.
This action, coupled with the fact that Martin I's elevation had taken place without imperial sanction, resulted in the Emperor's seising the Pope and exiling him to the Chersonesus in 653, the year of Paul II's death.
Imperial attempts to solve the Monophysite controversy, either by compromise or enforced silence, lost their urgency by the end of Paul II's tenure; by that time Arab conquests had overrun the most strongly Monophysitic provinces of the Byzantine Empire.
The Monothelite compromise was abjured by the Byzantine Church itself at the Third Council of Constantinople (680–681), which declared Paul II, among others, heretical.