diff --git a/src/main/java/org/codelibs/fess/app/web/admin/group/AdminGroupAction.java b/src/main/java/org/codelibs/fess/app/web/admin/group/AdminGroupAction.java
index d46e75d05..a6d613e82 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/group/AdminGroupAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/group/AdminGroupAction.java
@@ -25,6 +25,7 @@ import org.codelibs.fess.app.service.GroupService;
 import org.codelibs.fess.app.web.CrudMode;
 import org.codelibs.fess.app.web.base.FessAdminAction;
 import org.codelibs.fess.es.user.exentity.Group;
+import org.codelibs.fess.util.ComponentUtil;
 import org.codelibs.fess.util.RenderDataUtil;
 import org.dbflute.optional.OptionalEntity;
 import org.dbflute.optional.OptionalThing;
@@ -234,7 +235,7 @@ public class AdminGroupAction extends FessAdminAction {
     // ===================================================================================
     //                                                                        Assist Logic
     //                                                                        ============
-    private OptionalEntity<Group> getEntity(final CreateForm form) {
+    private static OptionalEntity<Group> getEntity(final CreateForm form) {
         switch (form.crudMode) {
         case CrudMode.CREATE:
             return OptionalEntity.of(new Group()).map(entity -> {
@@ -243,7 +244,7 @@ public class AdminGroupAction extends FessAdminAction {
             });
         case CrudMode.EDIT:
             if (form instanceof EditForm) {
-                return groupService.getGroup(((EditForm) form).id);
+                return ComponentUtil.getComponent(GroupService.class).getGroup(((EditForm) form).id);
             }
             break;
         default:
@@ -252,7 +253,7 @@ public class AdminGroupAction extends FessAdminAction {
         return OptionalEntity.empty();
     }
 
-    protected OptionalEntity<Group> getGroup(final CreateForm form) {
+    public static OptionalEntity<Group> getGroup(final CreateForm form) {
         return getEntity(form).map(entity -> {
             copyBeanToBean(form, entity, op -> op.exclude(Constants.COMMON_CONVERSION_RULE));
             return entity;
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/group/ApiAdminGroupAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/group/ApiAdminGroupAction.java
new file mode 100644
index 000000000..55bc8ac33
--- /dev/null
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/group/ApiAdminGroupAction.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2012-2017 CodeLibs Project and the Others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+package org.codelibs.fess.app.web.api.admin.group;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import javax.annotation.Resource;
+
+import org.codelibs.fess.Constants;
+import org.codelibs.fess.app.pager.GroupPager;
+import org.codelibs.fess.app.service.GroupService;
+import org.codelibs.fess.app.web.CrudMode;
+import org.codelibs.fess.app.web.api.ApiResult;
+import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
+import org.codelibs.fess.es.user.exentity.Group;
+import org.codelibs.fess.es.user.exentity.User;
+import org.lastaflute.web.Execute;
+import org.lastaflute.web.response.JsonResponse;
+
+import static org.codelibs.fess.app.web.admin.group.AdminGroupAction.*;
+
+public class ApiAdminGroupAction extends FessApiAdminAction {
+
+    @Resource
+    private GroupService groupService;
+
+    // GET /api/admin/group
+    // POST /api/admin/group
+    @Execute
+    public JsonResponse<ApiResult> settings(final SearchBody body) {
+        validateApi(body, messages -> {});
+        final GroupPager pager = new GroupPager();
+        copyBeanToBean(body, pager, op -> op.exclude(Constants.PAGER_CONVERSION_RULE));
+        final List<Group> list = groupService.getGroupList(pager);
+        return asJson(new ApiResult.ApiConfigsResponse<EditBody>()
+                .settings(list.stream().map(entity -> createEditBody(entity)).collect(Collectors.toList()))
+                .total(pager.getAllRecordCount()).status(ApiResult.Status.OK).result());
+    }
+
+    // GET /api/admin/group/setting/{id}
+    @Execute
+    public JsonResponse<ApiResult> get$setting(final String id) {
+        return asJson(new ApiResult.ApiConfigResponse()
+                .setting(groupService.getGroup(id).map(entity -> createEditBody(entity)).orElseGet(() -> {
+                    throwValidationErrorApi(messages -> messages.addErrorsCrudCouldNotFindCrudTable(GLOBAL, id));
+                    return null;
+                })).status(ApiResult.Status.OK).result());
+    }
+
+    // PUT /api/admin/group/setting
+    @Execute
+    public JsonResponse<ApiResult> put$setting(final CreateBody body) {
+        validateApi(body, messages -> {});
+        body.crudMode = CrudMode.CREATE;
+        final Group entity = getGroup(body).orElseGet(() -> {
+            throwValidationErrorApi(messages -> {
+                messages.addErrorsCrudFailedToCreateInstance(GLOBAL);
+            });
+            return null;
+        });
+        try {
+            groupService.store(entity);
+            saveInfo(messages -> messages.addSuccessCrudCreateCrudTable(GLOBAL));
+        } catch (final Exception e) {
+            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, buildThrowableMessage(e)));
+        }
+        return asJson(new ApiResult.ApiUpdateResponse().id(entity.getId()).created(true).status(ApiResult.Status.OK).result());
+    }
+
+    // POST /api/admin/group/setting
+    @Execute
+    public JsonResponse<ApiResult> post$setting(final EditBody body) {
+        validateApi(body, messages -> {});
+        body.crudMode = CrudMode.EDIT;
+        final Group entity = getGroup(body).orElseGet(() -> {
+            throwValidationErrorApi(messages -> {
+                messages.addErrorsCrudCouldNotFindCrudTable(GLOBAL, body.id);
+            });
+            return null;
+        });
+        try {
+            groupService.store(entity);
+        } catch (final Exception e) {
+            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToUpdateCrudTable(GLOBAL, buildThrowableMessage(e)));
+        }
+        return asJson(new ApiResult.ApiUpdateResponse().id(entity.getId()).created(false).status(ApiResult.Status.OK).result());
+    }
+
+    // DELETE /api/admin/group/setting/{id}
+    @Execute
+    public JsonResponse<ApiResult> delete$setting(final String id) {
+        final Group entity = groupService.getGroup(id).orElseGet(() -> {
+            throwValidationErrorApi(messages -> messages.addErrorsCrudCouldNotFindCrudTable(GLOBAL, id));
+            return null;
+        });
+        getUserBean().ifPresent(u -> {
+            if (u.getFessUser() instanceof User && entity.getName().equals(u.getUserId())) {
+                throwValidationErrorApi(messages -> messages.addErrorsCouldNotDeleteLoggedInUser(GLOBAL));
+            }
+        });
+        try {
+            groupService.delete(entity);
+            saveInfo(messages -> messages.addSuccessCrudDeleteCrudTable(GLOBAL));
+        } catch (final Exception e) {
+            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToDeleteCrudTable(GLOBAL, buildThrowableMessage(e)));
+        }
+        return asJson(new ApiResult.ApiUpdateResponse().id(id).created(false).status(ApiResult.Status.OK).result());
+    }
+
+    protected EditBody createEditBody(final Group entity) {
+        final EditBody body = new EditBody();
+        copyBeanToBean(entity, body, copyOp -> {
+            copyOp.excludeNull();
+        });
+        return body;
+    }
+}
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/group/CreateBody.java b/src/main/java/org/codelibs/fess/app/web/api/admin/group/CreateBody.java
new file mode 100644
index 000000000..2610fd928
--- /dev/null
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/group/CreateBody.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2012-2017 CodeLibs Project and the Others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+package org.codelibs.fess.app.web.api.admin.group;
+
+import org.codelibs.fess.app.web.admin.group.CreateForm;
+
+public class CreateBody extends CreateForm {
+}
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/group/EditBody.java b/src/main/java/org/codelibs/fess/app/web/api/admin/group/EditBody.java
new file mode 100644
index 000000000..df09ccd64
--- /dev/null
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/group/EditBody.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2012-2017 CodeLibs Project and the Others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+package org.codelibs.fess.app.web.api.admin.group;
+
+import org.codelibs.fess.app.web.admin.group.EditForm;
+
+public class EditBody extends EditForm {
+}
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/group/SearchBody.java b/src/main/java/org/codelibs/fess/app/web/api/admin/group/SearchBody.java
new file mode 100644
index 000000000..84d99adc0
--- /dev/null
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/group/SearchBody.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2012-2017 CodeLibs Project and the Others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+package org.codelibs.fess.app.web.api.admin.group;
+
+import org.codelibs.fess.app.web.admin.group.SearchForm;
+
+public class SearchBody extends SearchForm {
+}