The difference between Agent and Rep

When used as nouns, agent means one who exerts power, or has the power to act, whereas rep means ..

Rep is also verb with the meaning: to represent.

check bellow for the other definitions of Agent and Rep

Agent as a noun:

One who exerts power, or has the power to act
Agent as a noun:

One who acts for, or in the place of, another (the principal), by authority from him/her; someone entrusted to do the business of another
Agent as a noun:

A person who looks for work for another person
Agent as a noun:

Someone who works for an intelligence agency
Agent as a noun:

An active power or cause or substance; something which has the power to produce an effect
Agent as a noun (computing):

In the client-server model, the part of the system that performs information preparation and exchange on behalf of a client or server. Especially in the phrase “intelligent agent” it implies some kind of autonomous process which can communicate with other agents to perform some collective task on behalf of one or more humans.
Agent as a noun (grammar):

The participant of a situation that carries out the action in this situation, e.g. "the boy" in the sentences "The boy kicked the ball" and "The ball was kicked by the boy".

Rep as a noun (informal):

.

Examples:

"Try not to make it easy for the tabloids to ruin your rep."
Rep as a noun (weightlifting, countable):

.

Examples:

"I get a better [[bicep]] workout if I use less weight and more reps."
Rep as a noun (informal):

.

Examples:

"When I requested tickets for Nassau, my rep just put me on hold."

"John Doe is a participant in the House of Reps."
Rep as a noun (theater):

Examples:

"She did her time in reps before she made the grade in West End theatre."

Rep as a noun (textiles):

A fabric made of silk or wool, or of silk and wool, and having a transversely corded or ribbed surface.