(KJV verses as Proof-text)

• Acts 9:15: “He [Saul of Tarsus, Paul] is a chosen vessel unto me, to bear my name before the Gentiles, and kings, and the children of Israel”
• Acts 20:24: “But none of these things move me [Paul], neither count I my life dear unto myself, so that I might finish my course with joy, and the ministry, which I have received of the Lord Jesus, to testify the gospel of the grace of God.”
• Acts 26:16: “a minister and a witness” of God
• Romans 1:1: “Paul, … called to be an apostle, separated unto the gospel of God”
• Romans 11:13: “I [Paul] am the apostle of the Gentiles”
• Romans 15:16: “I should be the minister of Jesus Christ to the Gentiles, ministering the gospel of God, that the offering up of the Gentiles might be acceptable, being sanctified by the Holy Ghost.”
• Romans 16:25-26: “Now to him that is of power to stablish you according to my [Paul’s] gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began, But now is made manifest,”
• 1 Corinthians 1:1: “Paul, called to be an apostle of Jesus Christ through the will of God”
• 1 Corinthians 1:17: “Christ sent me… to preach the gospel”
• 1 Corinthians 3:10: “According to the grace of God which is given unto me [Paul], as a wise masterbuilder, I have laid the foundation, and another buildeth thereon.”
• 1 Corinthians 4:16: “Be ye followers of me [Paul].”
• 1 Corinthians 9:17: “a dispensation of the gospel is committed unto me”
• 1 Corinthians 11:1: “Be ye followers of me, even [that is] as I also am of Christ.”
• 1 Corinthians 11:23: “For I have received of the Lord that which also I delivered unto you….”
• 1 Corinthians 14:37: “If any man think himself to be a prophet, or spiritual, let him acknowledge that the things that I [Paul] write unto you are the commandments of the Lord.”
• 1 Corinthians 15:3: “the gospel which I preached unto you”
• 1 Corinthians 15:4: “I delivered unto you first of all that which I also received”
• 1 Corinthians 15:8: “and last of all he [Christ] was seen of me”
• 2 Corinthians 1:1: “Paul, an apostle of Jesus Christ by the will of God”
• Galatians 1:1: “Paul, an apostle, (not of men, neither by man, but by Jesus Christ, and God the Father, who raised him from the dead;)”
• Galatians 1:11-12: “But I certify you, brethren, that the gospel which was preached of me is not after man. For I neither received it of man, neither was I taught it, but by the revelation of [from] Jesus Christ.”
• Galatians 1:15-16: “But when it pleased God, who separated me from my mother’s womb, and called me by his grace, to reveal his Son in me, that I might preach him among the heathen [Gentiles]…”
• Galatians 2:2: “I went up by revelation, and communicated unto them that gospel which I preach among the Gentiles…”
• Galatians 2:6-9: “they who seemed to be somewhat in conference added nothing to me: but contrariwise, when they saw that the gospel of the uncircumcision was committed unto me [Paul], as the gospel of the circumcision was unto Peter; (For he that wrought effectually in Peter to the apostleship of the circumcision, the same was mighty in me toward the Gentiles:) And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we should go unto the heathen [Gentiles], and they unto the circumcision [the Jews].”
• Ephesians 1:1: “Paul, an apostle of Jesus Christ by the will of God”
• Ephesians 3:1-9: “For this cause I Paul, the prisoner of Jesus Christ for you Gentiles, If ye have heard of the dispensation of the grace of God which is given me to you-ward: How that by revelation he made known unto me the mystery; (as I wrote afore in few words, Whereby, when ye read, ye may understand my knowledge in the mystery of Christ) Which in other ages was not made known unto the sons of men, as it is now revealed unto his holy apostles and prophets by the Spirit; That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel: Whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of his power. Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ; And to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ:”
• Philippians 3:17: “Brethren, be followers together of me, and mark them which walk so as ye have us for an ensample.”
• Philippians 4:9: “Those things, which ye have both learned, and received, and heard, and seen in me, do: and the God of peace shall be with you.”
• Colossians 1:1: “Paul, an apostle of Jesus Christ by the will of God”
• Colossians 1:26-29: “Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints: To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory: Whom we preach, warning every man, and teaching every man in all wisdom; that we may present every man perfect in Christ Jesus: Whereunto I also labour, striving according to his working, which worketh in me mightily.”
• 1 Timothy 1:1: “Paul, an apostle of Jesus Christ by the commandment of God our Saviour, and Lord Jesus Christ”
• 1 Timothy 1:11: “The glorious gospel of the blessed God, which was committed to my trust”
• 1 Timothy 1:16: “Howbeit for this cause I [Paul] obtained mercy, that in me first Jesus Christ might shew forth all longsuffering, for a pattern to them which should hereafter believe on him to life everlasting.”
• 2 Timothy 1:1: “Paul, an apostle of Jesus Christ by the will of God, according to the promise of life which is in Christ Jesus,”
• 2 Timothy 1:11: “Whereunto I am appointed a preacher, and an apostle, and a teacher of the Gentiles.”
• 2 Timothy 2:8: “Remember that Jesus Christ of the seed of David was raised from the dead according to my gospel:”
• Titus 1:1-3: “Paul, a servant of God, and an apostle of Jesus Christ, according to the faith of God’s elect, and the acknowledging of the truth which is after godliness; In hope of eternal life, which God, that cannot lie, promised before the world began; But hath in due times manifested his word through preaching, which is committed unto me according to the commandment of God our Saviour;”

The Apostle Peter testifies to Paul’s apostleship:

• Acts 15:11-12: “But we believe that through the grace of the Lord Jesus Christ we shall be saved, even as they. Then all the multitude kept silence, and gave audience to Barnabas and Paul, declaring what miracles and wonders God had wrought among the Gentiles by them.”
• Galatians 2:9: “And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we [Paul] should go unto the heathen [Gk. ethnos, Gentiles], and they unto the circumcision.”
• 2 Peter 3:15-16: “And account that the longsuffering of our Lord is salvation; even as our beloved brother Paul also according to the wisdom given unto him hath written unto you; As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest [twist], as they do also the other scriptures, unto their own destruction.”

Taken from: https://ambassadorsfortherisenchristministries.org/2013/01/03/pauls-apostolic-authority-verses/