The keys to the Kingdom is the Gospel, the good news, and every one us, all the members of the royal preisthood get those keys and we all have the ministry of reconciliation as His ambassadors.

Yep, Paul said God revealed "HIS SON" ~
in~ Him (Who
is "the Rock") specifically THAT he MIGHT ~
preach HIM~ (for ~without Him~ they could do nothing). Heres where their gospel came not "in word only" but ~power~ and Christ
is the ~power of God~.
They ~bear~ HIS NAME = THE WORD OF GOD and just as Paul said, ye received it NOT as the ~word of men~ (against which their testimony was contrasted) but as it really is the Word of God (their Rock). They were speaking ~in Christ~ (the Spiritual Rock)
~in~ them.
Who do
MEN ~
SAY~ that
I AM is contrasted (specifically) against who THEY would
SAY that HE IS. Its to THIS confession "Thou art the Christ, the Son of God" he would build his church upon. The testimony of Jesus Christ. Its upon THIS confession (not of himself but given of God) and revealed of the Father (within him) that would not be prevailed upon. Jesus spake to ALL the disciples when asking the question its just answered in ~the one~ but He asked THEM.
Its an ~immovable Rock~ as ~the Kingdom~ they were receiving (itself) is unmoveble Kingdom. Even Peter himself speaks to ~the entrance~ that would be ~ministered unto them~ into the very Kingdom (others see only Peter has the keys to). Not so, because what
THE LORD ~opens~ NO MAN can shut and what HE shuts NO MAN can open.
Flesh and blood did not reveal (His SON) to either Peter or to Paul (in them). It was by a "revelation" given of the Father. This is consistent with NO MAN can SAY He is THE LORD save by the Holy Spirit. So what either COULD SAY was GIVEN THEM. Just as the mysteries of the Kingdom was GIVEN THEM and just as the KEYS (for entrance) into the Kingdom was given Peter, he himself says the ~same entrance~ (into the Kingdom) would be ~ministered to them~ (in like fashion). NO MAN cometh unto the Father but BY ME. Hes the ROCK (inwardly revealed) by the revelation of the Father. Its GIVEN, and THAT by THE SPIRIT (by the which) NO MAN can SAY except BY HIM.
We are all LIVING STONES (As Cephas is interpreted
A Stone) so also (as Peter confirmed) are WE. No doubt the church is built upon the foundation of apostles ~PLURAL~ (not singular) ~having~ Jesus Christ (not Peter) as the Chief Corner Stone. HE is both the Spiritual Rock, and Stone which is laid in Sion (By the Father). Upon THIS ROCK is built His Church (our confession of Him). No other foundation can be laid save the one that is, and thats Christ and Him in us and that by the Father Himself.
Lastly, looking at that verse in context of the whole Bible, the RCC teaching fails for the whole Bible points to Christ as the head of the Church and Him as the foundation, our all in all.....not Peter.
Yep

The foundation, Chief Cornerstone, the Spiritual Rock is Christ (who accompanied them) through which the multitudes are fed (spiritual meat and drink). He is the Head, the wall of fire and the glory within (Christ in us). He's all THAT then some
Peace
Fireinfolding