Consistent APIs help simplify integration
WebSphere MQ provides a consistent application programming interface (API), called the Message Queue Interface (MQI), across all its supported platforms and programming environments to help make your programs portable. Along with providing this de facto standard interface, WebSphere MQ also fully implements the industry-standard Java™ interface — Java Message Service (JMS), Version 1.1 — including the publish-and-subscribe approach to directing flows of messages.

WebSphere Application Server also supports JMS. Although JMS doesn’t provide a standard for interoperability between messaging implementations, the messaging resources of WebSphere Application Server and WebSphere MQ interoperate seamlessly. As a result, you can combine these products to form an ESB to integrate hosted Java 2 Platform, Enterprise Edition (J2EE) applications with the rest of the enterprise.