Collocations for agent - noun

booking, ticket, travel
election (BrE), parliamentary (BrE)
advertising, press, publicity
land (BrE), leasing (AmE), letting (BrE), managing (esp. BrE), rental (AmE)
estate (BrE), real estate (AmE)
They were advised by the real estate agent that their house would not be saleable.

border-patrol, law enforcement
insurance
literary, sports, talent
local
The company has developed sales through local agents in key markets.

employ, have, use
I have an agent who deals with all my contracts.

appoint, get (sb), hire (esp. AmE)
If you want to get published, get yourself an agent!

act as
fire, sack (BrE)

through an agent
She got the work through an agent.

agent for
an agent for a shipping company

intelligence
enemy, foreign
federal, government
covert, secret, special, undercover
double
As a double agent, he worked for the Americans and the Russians.

chief, main, primary, prime, principal
effective
human
moral, rational
free
I told him I couldn't stop him and that he was a free agent.

agent for
The charity is an agent for social change.

an agent for change, an agent of change