diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
index 6764b1a..c53dae6 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
@@ -4,7 +4,6 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
 
-import javax.ws.rs.Consumes;
 import javax.ws.rs.DefaultValue;
 import javax.ws.rs.GET;
 import javax.ws.rs.HEAD;
@@ -13,7 +12,6 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.Context;
-import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.MultivaluedMap;
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.Response.Status;
@@ -116,7 +114,6 @@ public class Access extends BaseRest {
 	 */
 	@GET
 	@Path(AccessPath.CONTEXTS_PATH_PART + "/{" + AccessPath.UUID_PATH_PARAM + "}")
-	@Consumes({MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8})
 	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String getContext(@PathParam(AccessPath.UUID_PATH_PARAM) String uuid)
 			throws ContextNotFoundException, ResourceRegistryException {
@@ -144,7 +141,6 @@ public class Access extends BaseRest {
 	 */
 	@GET
 	@Path(AccessPath.TYPES_PATH_PART + "/{" + AccessPath.TYPE_PATH_PARAM + "}")
-	@Consumes({MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8})
 	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String getType(@PathParam(AccessPath.TYPE_PATH_PARAM) String type,
 			@QueryParam(AccessPath.POLYMORPHIC_PARAM) @DefaultValue("false") Boolean polymorphic)
@@ -172,7 +168,6 @@ public class Access extends BaseRest {
 	 */
 	@GET
 	@Path(AccessPath.INSTANCES_PATH_PART + "/{" + AccessPath.TYPE_PATH_PARAM + "}")
-	@Consumes({MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8})
 	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String getAllInstances(@PathParam(AccessPath.TYPE_PATH_PARAM) String type,
 			@QueryParam(AccessPath.POLYMORPHIC_PARAM) @DefaultValue("true") Boolean polymorphic)
@@ -202,7 +197,6 @@ public class Access extends BaseRest {
 	 */
 	@HEAD
 	@Path(AccessPath.INSTANCES_PATH_PART + "/{" + AccessPath.TYPE_PATH_PARAM + "}" + "/{" + AccessPath.UUID_PATH_PARAM + "}")
-	@Consumes({MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8})
 	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public Response instanceExists(@PathParam(AccessPath.TYPE_PATH_PARAM) String type,
 			@PathParam(AccessPath.UUID_PATH_PARAM) String uuid) throws NotFoundException, ResourceRegistryException {
@@ -247,7 +241,6 @@ public class Access extends BaseRest {
 	 */
 	@GET
 	@Path(AccessPath.INSTANCES_PATH_PART + "/{" + AccessPath.TYPE_PATH_PARAM + "}" + "/{" + AccessPath.UUID_PATH_PARAM + "}")
-	@Consumes({MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8})
 	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String getInstance(@PathParam(AccessPath.TYPE_PATH_PARAM) String type,
 			@PathParam(AccessPath.UUID_PATH_PARAM) String uuid) throws NotFoundException, ResourceRegistryException {
@@ -280,8 +273,7 @@ public class Access extends BaseRest {
 	 * 
 	 */
 	@GET
-	@Path(AccessPath.INSTANCES_PATH_PART + "/{" + AccessPath.TYPE_PATH_PARAM + "}" + "/{" + AccessPath.UUID_PATH_PARAM + "}")
-	@Consumes({MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8})
+	@Path(AccessPath.INSTANCES_PATH_PART + "/{" + AccessPath.TYPE_PATH_PARAM + "}" + "/{" + AccessPath.UUID_PATH_PARAM + "}/" + AccessPath.CONTEXTS_PATH_PART)
 	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String getInstanceContexts(@PathParam(AccessPath.TYPE_PATH_PARAM) String type,
 			@PathParam(AccessPath.UUID_PATH_PARAM) String instanceId) throws NotFoundException, ResourceRegistryException {