Well, I think that's a misunderstanding, as the Catholic Church, in Trent, rejected Pelagianism in its first Canon on Justification: "Canon 1. If anyone says
that man can be justified before God by his own works, whether done by his own natural powers or through the teaching of the law, without divine grace through Jesus Christ, let him be
anathema."
https://www.k-state.edu/english/baker/english233/Council_of_Trent6.htm
But in
529 A.D. so long ago, there was a Council of Orange that shows what the early Christians believed. This was an Council that endorsed Augustinian Theology, and thus heavily emphasized the Grace of God, yet without denying Free Will, nor the necessity to pray for Perseverance: "According to the catholic faith we also believe that
after grace has been received through baptism, all baptized persons have the ability and responsibility, if they desire to labor faithfully, to perform with the aid and cooperation of Christ what is of essential importance in regard to the salvation of their soul. We not only do not believe that any are foreordained to evil by the power of God, but even state with utter abhorrence that if there are those who want to believe so evil a thing, they are anathema [rejection of predestination to hell].
We also believe and confess to our benefit that in every good work it is not we who take the initiative and are then assisted through the mercy of God, but God himself first inspires in us both faith in him and love for him without any previous good works of our own that deserve reward, so that we may both faithfully seek the sacrament of baptism, and after baptism be able by his help to do what is pleasing to him. We must therefore most evidently believe that the praiseworthy faith of the thief whom the Lord called to his home in paradise, and of Cornelius the centurion, to whom the angel of the Lord was sent, and of Zacchaeus, who was worthy to receive the Lord himself, was not a natural endowment but a gift of God's kindness." Taken from:
http://www.crivoice.org/creedorange.html
God Bless.