@java.lang.Override
    public java.lang.String executeAction() throws Exception
    {
        // BEGIN USER CODE
        Optional<IMxRuntimeRequest> optionalMXRequest = getContext().getRuntimeRequest();
        if(optionalMXRequest.isEmpty()) {
            LOG.error("Context has empty IMXRuntimeRequest");
            throw new Exception("No IMxRuntimeRequest found");
        }
        LOG.debug("Context has IMXRuntimeRequest");
        IMxRuntimeRequest request = optionalMXRequest.get();
        LOG.debug("request headers start");
        Enumeration<String> headerNames = request.getHttpServletRequest().getHeaderNames();
        String value = "";
        while(headerNames.hasMoreElements()) {
            if(this.Key==((String) headerNames.nextElement())) {
                value = request.getHeader(this.Key);
                LOG.debug(this.Key+":"+value);
            }
        }
        if(value=="") {
            LOG.error("Header with Key:"+this.Key+" Does not exist");
            throw new Exception("Header not found");
        }
        LOG.debug("request headers end");
        return value;
        // END USER CODE
    }    
Hi Alwyn,
Make sure you have an httpRequest parameter in your webservice microflow, then you can just do a retrieve by association from $httpRequest/HttpHeaders
Hi ,
Have you tried using JamCommons ? it has a javaaction to get header value https://marketplace.mendix.com/link/component/71280
Hope this helps.
Thanks