This session provides a deep dive into RESTful web services and how it can be used to interface with IBM MQ to achieve asynchronous messaging. The presentation starts with some basics around REST and the HTTP protocol, as well as how to use or provide RESTful web services with z/VSE in general. After the end-of-service of IBM WebShpere MQ Server on z/VSE and the change of the support statement of the MQ Client on z/VSE to 'as-is', the REST interface provided by MQ version 9 can now be used together with the z/VSE REST engine to utilize asynchronous messaging using a supported software stack.