Synonyms of interagent

2 Syllables
fixer, brokers, broker, fixers, cutout
3 Syllables
mediator, mediators, stockbrokers, go-betweens, go-between, middlemen, stockbroker, matchmakers, middleman, matchmaker
4 Syllables
negotiators, rent-a-judge, interceder, negotiator, intermedium
5 Syllables
intermediary, intermediator, intermediaries