The configprops endpoint provides information about configuration options that can be configured through application properties. It basically is a collated list of all @ConfigurationProperties. ;The following screenshot shows configprops in HAL Browser:

To illustrate a known example, the following section from the service response shows the configuration options available for Spring MVC:

"spring.mvc-  org.springframework.boot.autoconfigure.web.WebMvcProperties": {
   "prefix": "spring.mvc",
   "properties": {
                   "dateFormat": null,
                   "servlet": {
                     "loadOnStartup": -1
                  },
   "staticPathPattern": "/**",
   "dispatchOptionsRequest": true,
   "dispatchTraceRequest": false,
   "locale": null,
   "ignoreDefaultModelOnRedirect": true,
   "logResolvedException": true,
   "async": {
              "requestTimeout": null
            },
   "messageCodesResolverFormat": null,
   "mediaTypes": {},
   "view": {
             "prefix": null,
             "suffix": null
           },
   "localeResolver": "ACCEPT_HEADER",
   "throwExceptionIfNoHandlerFound": false
    }
 }