broker
n. countablen. a person or a piece of software that helps two different sides talk to each other or make a deal. In computing, it is a middleman that passes messages between different systems.
n. an intermediary agent that facilitates transactions or communication between two parties. In a technical context, it refers to a software component that manages the exchange of data or messages between distributed systems.
The message broker sends data between the two apps.
The insurance broker compared several different policies to find the best coverage for the client's specific needs.
By implementing a centralized message broker, the engineering team decoupled the microservices, allowing each component to scale independently without requiring direct knowledge of the other services' locations.
From broke + -er.
From Middle English broker, brokour, brocour, from Anglo-Norman brocour (“small trader”) (compare also abroker (“to act as a broker”)), from Old Dutch brokere (“one who determines the usages of trade, manager”), from broke, bruyck, breuck (“use, usage, trade”), from Proto-West Germanic brūkī (“use, custom”), from Proto-Germanic brūkiz (“use, custom”), from Proto-Indo-European bʰruHg- (“to use, enjoy”), equivalent to brook + -er. Cognates Cognate with Middle Low German brukere (“a broker”), Danish bruger (“a broker, user, handler”), Swedish bruk (“use, custom, trade, business”), Old English broc (“use, profit, advantage, foredeal”). Compare also French brocanter (“to deal in second-hand goods”) from the same Germanic source. More at brook.
Commonly used in business contexts for people and in software architecture for middleware systems.