``` application_type":"web" ``` Try `native`

Thanks for your reply but unfortunately it didn't help. I also tested POSTing the request with empty body, which I expected a http status code 400 but I received 500 (Internal server error) again! (When I send a simple **GET** request to this endpoint, I receive status code 400, and always status code 500 for **POST** requests) p.s. I didn't change any default sever configuration related to dynamic client registration.

Apache logs? Oxauth logs? Also please include your updated request

**oxauth.log**: ``` 2017-11-06 11:02:45,231 ERROR [qtp2008017533-19] [xdi.oxauth.register.ws.rs.RegisterRestWebServiceImpl] (RegisterRestWebServiceImpl.java:231) - A JSONObject text must begin with '{' at character 0 of org.codehaus.jettison.json.JSONException: A JSONObject text must begin with '{' at character 0 of at org.codehaus.jettison.json.JSONTokener.syntaxError(JSONTokener.java:463) ~[jettison-1.3.2.jar:1.3.2] at org.codehaus.jettison.json.JSONObject.<init>(JSONObject.java:173) ~[jettison-1.3.2.jar:1.3.2] at org.codehaus.jettison.json.JSONObject.<init>(JSONObject.java:280) ~[jettison-1.3.2.jar:1.3.2] at org.xdi.oxauth.client.RegisterRequest.fromJson(RegisterRequest.java:978) ~[oxauth-client-3.1.0.Final.jar:?] at org.xdi.oxauth.register.ws.rs.RegisterRestWebServiceImpl.registerClientImpl(RegisterRestWebServiceImpl.java:113) [classes/:?] at org.xdi.oxauth.register.ws.rs.RegisterRestWebServiceImpl.requestRegister(RegisterRestWebServiceImpl.java:102) [classes/:?] at org.xdi.oxauth.register.ws.rs.RegisterRestWebServiceImpl$Proxy$_$$_WeldClientProxy.requestRegister(Unknown Source) [classes/:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_112] at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:402) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:209) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:228) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51) [resteasy-jaxrs-3.0.21.Final.jar:3.0.21.Final] at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [servlet-api-3.1.jar:3.1.0] at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:845) [jetty-servlet-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1772) [jetty-servlet-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:193) [websocket-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759) [jetty-servlet-9.3.15.v20161220.jar:9.3.15.v20161220] at org.ocpsoft.rewrite.servlet.RewriteFilter.doFilter(RewriteFilter.java:226) [rewrite-servlet-3.4.1.Final.jar:3.4.1.Final] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759) [jetty-servlet-9.3.15.v20161220.jar:9.3.15.v20161220] at org.gluu.oxserver.filters.AbstractCorsFilter.handleSimpleCORS(AbstractCorsFilter.java:212) [oxcore-server-3.1.0.Final.jar:?] at org.gluu.oxserver.filters.AbstractCorsFilter.doFilter(AbstractCorsFilter.java:112) [oxcore-server-3.1.0.Final.jar:?] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759) [jetty-servlet-9.3.15.v20161220.jar:9.3.15.v20161220] at org.xdi.oxauth.audit.debug.ServletLoggingFilter.doFilter(ServletLoggingFilter.java:73) [classes/:?] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1751) [jetty-servlet-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582) [jetty-servlet-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) [jetty-security-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512) [jetty-servlet-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.Server.handle(Server.java:534) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251) [jetty-server-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283) [jetty-io-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110) [jetty-io-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93) [jetty-io-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303) [jetty-util-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148) [jetty-util-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136) [jetty-util-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671) [jetty-util-9.3.15.v20161220.jar:9.3.15.v20161220] at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) [jetty-util-9.3.15.v20161220.jar:9.3.15.v20161220] at java.lang.Thread.run(Thread.java:745) [?:1.8.0_112] ``` and my **Request**: **Header**: ``` Host: my-idp.com User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0 Accept: application/json Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate, br Referer: http://127.0.0.1:8080/jsapp/ Content-Type: application/json Content-Length: 263 Origin: http://127.0.0.1:8080 Connection: keep-alive Cache-Control: max-age=0, no-cache Pragma: no-cache ``` **Body**: ``` {"redirect_uris":["https://localhost:8443/jsapp/login-callback.html"],"application_type":"native","client_name":"Dynamically Registered Client","subject_type":"public","grant_types":["implicit"],"response_types":["token","id_token"],"scopes":["email","openid","profile"]} ``` It seems there is a problem with my JSON object format but it looks OK. **UPDATE**: I tested requesting dynamic client registration with another client web application and again the same Status Code 500 and the same error in oxauth.log (JSONException).

Hi, Bahador. Next request, produced from the latest request your shared, worked as expected for me: ``` POST /oxauth/restv1/register HTTP/1.1 Host: clstr-ce302.host.loc User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0 Accept: application/json Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate, br Referer: http://127.0.0.1:8080/jsapp/ Content-Type: application/json Content-Length: 273 Origin: http://127.0.0.1:8080 Connection: keep-alive Cache-Control: max-age=0, no-cache Pragma: no-cache {"redirect_uris":["https://localhost:8443/jsapp/login-callback.html"],"application_type":"native","client_name":"Dynamically Registered Client","subject_type":"public","grant_types":["implicit"],"response_types":["token","id_token"],"scopes":["email","openid","profile"]} ``` Everything is left mostly unchanged, except for the directives I had to change to run it against my own instance. The client is created successfully. Could you perhaps re-test it in 3.1.1 package, if possible? **Update:** By the way, also works for me in case `"application_type":"web"` is used.

Thanks for your help. Upgrading from 3.1.0 to 3.1.1 according to this [link](https://gluu.org/docs/ce/upgrade/#upgrade-from-310-to-311) did not resolve the problem. so I removed 3.1.0 and installed 3.1.1 package and it worked nice!