To date, there is no standard. Adapters are a layer between the message broker and the source or target application or data. Thin adapters are offered by the most popular message brokers today. In most cases, they are simple API wrappers, or binders, delivered as a set of libraries, that map the interface of the source or target system to a common interface supported by the message broker. In other words, they simply perform an API binding trick, binding one API to another.
Thin adapters have the advantage of simplicity in implementation.
They have a number of disadvantages, though. Since nothing more than trading one interface software for another is being accomplished, thin adapters impact performance without increasing functionality. Quite a bit of programming will still be required. Complicating matters is the fact that common APIs which are being mapped are almost always proprietary. Thick adapters , in contrast, provide a lot of software and functionality between the message broker infrastructure and the source or target applications.