diff --git a/client/.babelrc b/client/.babelrc
index 712064f2..5a460ec4 100644
--- a/client/.babelrc
+++ b/client/.babelrc
@@ -1,3 +1,4 @@
 {
-  "plugins": ["transform-react-jsx", "transform-decorators-legacy"]
+  "presets": ["stage-1"],
+  "plugins": ["transform-react-jsx", "transform-decorators-legacy", "transform-function-bind"]
 }
\ No newline at end of file
diff --git a/client/package.json b/client/package.json
index 87eafd6d..15f2547d 100644
--- a/client/package.json
+++ b/client/package.json
@@ -15,8 +15,10 @@
   "license": "GPL-3.0",
   "homepage": "https://mailtrain.org/",
   "dependencies": {
+    "axios": "^0.16.1",
     "i18next": "^8.3.0",
     "i18next-xhr-backend": "^1.4.1",
+    "immutable": "^3.8.1",
     "prop-types": "^15.5.10",
     "react": "^15.5.4",
     "react-dom": "^15.5.4",
@@ -27,8 +29,10 @@
     "babel-cli": "^6.24.1",
     "babel-loader": "^7.0.0",
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
+    "babel-plugin-transform-function-bind": "^6.22.0",
     "babel-preset-es2015": "^6.24.1",
     "babel-preset-react": "^6.24.1",
+    "babel-preset-stage-1": "^6.24.1",
     "css-loader": "^0.28.3",
     "i18next-conv": "^3.0.3",
     "style-loader": "^0.18.1",
diff --git a/client/src/lib/form.js b/client/src/lib/form.js
new file mode 100644
index 00000000..c0188dab
--- /dev/null
+++ b/client/src/lib/form.js
@@ -0,0 +1,247 @@
+'use strict';
+
+import React, { Component } from 'react';
+import axios from 'axios';
+import Immutable from 'immutable';
+import { translate } from 'react-i18next';
+import PropTypes from 'prop-types';
+import { Button } from './page.js';
+
+const FormState = {
+    Loading: 0,
+    LoadingWithNotice: 1,
+    Ready: 2
+};
+
+
+@translate()
+class Form extends Component {
+    static propTypes = {
+        stateOwner: PropTypes.object.isRequired,
+        onSubmit: PropTypes.func
+    }
+
+    static childContextTypes = {
+        stateOwner: PropTypes.object
+    }
+
+    getChildContext() {
+        return {
+            stateOwner: this.props.stateOwner
+        };
+    }
+
+    render() {
+        const t = this.props.t;
+        const owner = this.props.stateOwner;
+        const props = this.props;
+
+        if (!owner.isFormReady()) {
+            if (owner.isFormWithLoadingNotice()) {
+                return <div>{t('Loading ...')}</div>
+            } else {
+                return <div></div>;
+            }
+        } else {
+            return (
+                <form className="form-horizontal" onSubmit={props.onSubmit}>
+                    {props.children}
+                </form>
+            );
+        }
+    }
+}
+
+function wrapInput(id, htmlId, owner, label, input) {
+    return (
+        <div className={owner.addFormValidationClass('form-group', id)} >
+            <div className="col-sm-2">
+                <label htmlFor={htmlId} className="control-label">{label}</label>
+            </div>
+            <div className="col-sm-10">
+                {input}
+            </div>
+            <div className="help-block col-sm-offset-2 col-sm-10" id={htmlId + '_help'}>{owner.getFormValidationMessage(id)}</div>
+        </div>
+    );
+}
+
+class InputField extends Component {
+    static propTypes = {
+        id: PropTypes.string.isRequired,
+        label: PropTypes.string.isRequired,
+        placeholder: PropTypes.string
+    }
+
+    static contextTypes = {
+        stateOwner: PropTypes.object.isRequired
+    }
+
+    render() {
+        const props = this.props;
+        const owner = this.context.stateOwner;
+        const id = this.props.id;
+        const htmlId = 'form_' + id;
+
+        return wrapInput(id, htmlId, owner, props.label,
+            <input type="text" value={owner.getFormState(id)} placeholder={props.placeholder} id={htmlId} className="form-control" aria-describedby={htmlId + '_help'} onChange={owner.bindToFormState(id)}/>
+        );
+    }
+}
+
+class TextArea extends Component {
+    static propTypes = {
+        id: PropTypes.string.isRequired,
+        label: PropTypes.string.isRequired,
+        placeholder: PropTypes.string
+    }
+
+    static contextTypes = {
+        stateOwner: PropTypes.object.isRequired
+    }
+
+    render() {
+        const props = this.props;
+        const owner = this.context.stateOwner;
+        const id = this.props.id;
+        const htmlId = 'form_' + id;
+
+        return wrapInput(id, htmlId, owner, props.label,
+            <textarea id={htmlId} value={owner.getFormState(id)} className="form-control" aria-describedby={htmlId + '_help'} onChange={owner.bindToFormState(id)}></textarea>
+        );
+    }
+}
+
+class ButtonRow extends Component {
+    render() {
+        return (
+            <div className="form-group">
+                <div className="col-sm-10 col-sm-offset-2 mt-button-row">
+                    {this.props.children}
+                </div>
+            </div>
+        );
+    }
+}
+
+
+
+
+function withForm(target) {
+    const inst = target.prototype;
+
+    inst.initFormState = function() {
+        const state = this.state || {};
+
+        state.formState = Immutable.Map({
+            _state: FormState.Loading,
+            _isValidationShown: false
+        });
+
+        this.state = state;
+    };
+
+    inst.populateFormStateFromURL = function(url) {
+        setTimeout(() => {
+            this.setState(previousState => {
+                if (previousState.formState.get('_state') === FormState.Loading) {
+                    return {
+                        formState: previousState.formState.set('_state', FormState.LoadingWithNotice)
+                    };
+                }
+            });
+        }, 500);
+
+        axios.get(url).then(response => {
+            this.populateFormState(response.data);
+        });
+    };
+
+    inst.populateFormState = function(data) {
+        this.setState(previousState => ({
+            formState: previousState.formState.withMutations(state => {
+                state.set('_state', FormState.Ready);
+
+                for (const key in data) {
+                    state.set(key, Immutable.Map({
+                        value: data[key]
+                    }));
+                }
+
+                this.validateFormState(state);
+            })
+        }));
+    };
+
+    inst.updateFormState = function(key, value) {
+        this.setState(previousState => ({
+            formState: previousState.formState.withMutations(state => {
+                state.setIn([key, 'value'], value);
+                this.validateFormState(state);
+            })
+        }));
+    };
+
+    inst.bindToFormState = function(name) {
+        return evt => this.updateFormState(name, evt.target.value);
+    };
+
+    inst.getFormState = function(name) {
+        return this.state.formState.getIn([name, 'value']);
+    };
+
+    inst.getFormError = function(name) {
+        return this.state.formState.getIn([name, 'error']);
+    };
+
+    inst.isFormWithLoadingNotice = function() {
+        return this.state.formState.get('_state') === FormState.LoadingWithNotice;
+    };
+
+    inst.isFormReady = function() {
+        return this.state.formState.get('_state') === FormState.Ready;
+    };
+
+    inst.isFormValidationShown = function() {
+        return this.state.formState.get('_isValidationShown');
+    };
+
+    inst.addFormValidationClass = function(className, name) {
+        if (this.isFormValidationShown()) {
+            const error = this.getFormError(name);
+            if (error) {
+                return className + ' has-error';
+            } else {
+                return className + ' has-success';
+            }
+        } else {
+            return className;
+        }
+    };
+
+    inst.getFormValidationMessage = function(name) {
+        if (this.isFormValidationShown()) {
+            return this.getFormError(name);
+        } else {
+            return '';
+        }
+    };
+
+    inst.showFormValidation = function() {
+        this.setState(previousState => ({formState: previousState.formState.set('_isValidationShown', true)}));
+    };
+
+    inst.hideFormValidation = function() {
+        this.setState(previousState => ({formState: previousState.formState.set('_isValidationShown', false)}));
+    };
+}
+
+
+export {
+    withForm,
+    Form,
+    InputField,
+    TextArea,
+    ButtonRow,
+    Button
+}
diff --git a/client/src/i18n.js b/client/src/lib/i18n.js
similarity index 100%
rename from client/src/i18n.js
rename to client/src/lib/i18n.js
diff --git a/client/src/lib/page.css b/client/src/lib/page.css
new file mode 100644
index 00000000..8f338941
--- /dev/null
+++ b/client/src/lib/page.css
@@ -0,0 +1,7 @@
+.mt-button-row > button{
+    margin-right: 15px;
+}
+
+.mt-button-row > button:last-child {
+    margin-right: 0px;
+}
\ No newline at end of file
diff --git a/client/src/lib/page.js b/client/src/lib/page.js
new file mode 100644
index 00000000..d00c636a
--- /dev/null
+++ b/client/src/lib/page.js
@@ -0,0 +1,200 @@
+'use strict';
+
+import React, { Component } from 'react';
+import { translate } from 'react-i18next';
+import PropTypes from 'prop-types';
+import { withRouter } from 'react-router';
+import { BrowserRouter as Router, Route, Link, Switch } from 'react-router-dom'
+
+import './page.css';
+
+
+class PageContent extends Component {
+    getRoutes(urlPrefix, children) {
+        let routes = [];
+        for (let routeKey in children) {
+            const structure = children[routeKey];
+
+            let path = urlPrefix + routeKey;
+
+            if (structure.params) {
+                path = path + '/' + structure.params.join('/');
+            }
+
+            if (structure.component) {
+                const route = {
+                    component: structure.component,
+                    path: (path === '' ? '/' : path)
+                };
+
+                routes.push(route);
+            }
+
+            if (structure.children) {
+                routes = routes.concat(this.getRoutes(path + '/', structure.children));
+            }
+        }
+
+        return routes;
+    }
+
+    renderRoute(route) {
+        return <Route key={route.path} exact path={route.path} component={route.component} />;
+    }
+
+    render() {
+        let routes = this.getRoutes('', this.props.structure);
+        return <Switch>{routes.map(x => this.renderRoute(x))}</Switch>;
+    }
+}
+
+@withRouter
+class Breadcrumb extends Component {
+    renderElement(breadcrumbElem) {
+        if (breadcrumbElem.isActive) {
+            return <li key={breadcrumbElem.idx} className="active">{breadcrumbElem.title}</li>;
+        } else if (breadcrumbElem.externalLink) {
+            return <li key={breadcrumbElem.idx}><a href={breadcrumbElem.externalLink}>{breadcrumbElem.title}</a></li>;
+        } else if (breadcrumbElem.link) {
+            return <li key={breadcrumbElem.idx}><Link to={breadcrumbElem.link}>{breadcrumbElem.title}</Link></li>;
+        } else {
+            return <li key={breadcrumbElem.idx}>{breadcrumbElem.title}</li>;
+        }
+    }
+
+    render() {
+        const location = this.props.location.pathname;
+        const locationElems = location.split('/');
+
+        let breadcrumbElems = [];
+        let children = this.props.structure;
+
+        for (let idx = 0; idx < locationElems.length; idx++) {
+            const breadcrumbElem = children[locationElems[idx]];
+            if (!breadcrumbElem) {
+                break;
+            }
+
+            breadcrumbElem.isActive = (idx === locationElems.length - 1);
+            breadcrumbElem.idx = idx;
+
+            breadcrumbElems.push(breadcrumbElem);
+            children = breadcrumbElem.children;
+
+            if (!children) {
+                break;
+            }
+        }
+
+        const renderedElems = breadcrumbElems.map(x => this.renderElement(x));
+
+        return <ol className="breadcrumb">{renderedElems}</ol>;
+    }
+}
+
+@translate()
+class Section extends Component {
+    constructor(props) {
+        super(props);
+
+        let structure = props.structure;
+        if (typeof structure === 'function') {
+            structure = structure(props.t);
+        }
+
+        this.structure = structure;
+    }
+
+    render() {
+        return (
+            <Router>
+                <div>
+                    <Breadcrumb structure={this.structure} />
+                    <PageContent structure={this.structure}/>
+                </div>
+            </Router>
+        );
+    }
+}
+
+class Title extends Component {
+    render() {
+        return (
+            <div>
+                <h2>{this.props.children}</h2>
+                <hr/>
+            </div>
+        );
+    }
+}
+
+class Toolbar extends Component {
+    render() {
+        return (
+            <div className="pull-right mt-button-row">
+                {this.props.children}
+            </div>
+        );
+    }
+}
+
+class Button extends Component {
+    static propTypes = {
+        onClick: PropTypes.func,
+        label: PropTypes.string,
+        icon: PropTypes.string,
+        className: PropTypes.string,
+        type: PropTypes.string
+    }
+
+    render() {
+        const props = this.props;
+
+        let className = 'btn';
+        if (props.className) {
+            className = className + ' ' + props.className;
+        }
+
+        let type = props.type || 'button';
+
+        let icon;
+        if (props.icon) {
+            icon = <span className={'glyphicon glyphicon-' + props.icon}></span>
+        }
+
+        let iconSpacer;
+        if (props.icon && props.label) {
+            iconSpacer = ' ';
+        }
+
+        return (
+            <button type={type} className={className} onClick={props.onClick}>{icon}{iconSpacer}{props.label}</button>
+        );
+    }
+}
+
+class NavButton extends Component {
+    static propTypes = {
+        label: PropTypes.string,
+        icon: PropTypes.string,
+        className: PropTypes.string,
+        linkTo: PropTypes.string
+    };
+
+    render() {
+        const props = this.props;
+
+        return (
+            <Link to={props.linkTo}><Button label={props.label} icon={props.icon} className={props.className}/></Link>
+        );
+    }
+}
+
+
+export {
+    Section,
+    Title,
+    Toolbar,
+    Button,
+    NavButton
+};
\ No newline at end of file
diff --git a/client/src/namespaces.js b/client/src/namespaces.js
deleted file mode 100644
index 7959d7fe..00000000
--- a/client/src/namespaces.js
+++ /dev/null
@@ -1,86 +0,0 @@
-'use strict';
-
-import ReactDOM from 'react-dom';
-import React, { Component } from 'react';
-import {
-    BrowserRouter as Router,
-    Route,
-    Link
-} from 'react-router-dom'
-
-import { I18nextProvider, translate } from 'react-i18next';
-import i18n from './i18n';
-
-import NamespacesTreeTable from './namespaces/NamespacesTreeTable';
-
-
-@translate()
-class List extends Component {
-    render() {
-        console.log(this.props);
-        console.log(this.props.routes);
-        const t = this.props.t;
-
-        return (
-            <div>
-                <h2>{t('Namespaces')}</h2>
-
-                <hr />
-
-                <NamespacesTreeTable />
-            </div>
-        );
-    }
-}
-
-
-@translate()
-class Create extends Component {
-    render() {
-        console.log(this.props);
-        console.log(this.props.routes);
-        const t = this.props.t;
-        return (
-            <div>
-                <h2>{t('Create Namespace')}</h2>
-
-                <hr />
-            </div>
-        );
-    }
-}
-
-
-@translate()
-class Namespaces extends Component {
-    render() {
-        const t = this.props.t;
-
-        return (
-            <Router>
-                <div>
-                    <ol className="breadcrumb">
-                        <li><a href="/">{t('Home')}</a></li>
-                        <li className="active">{t('Namespaces')}</li>
-                    </ol>
-
-                    <div className="pull-right">
-                        <Link to="/namespaces/create"><span className="btn btn-primary" role="button"><i className="glyphicon glyphicon-plus"></i> {t('Create Namespace')}</span></Link>
-                    </div>
-
-                    <Route exact path="/namespaces" component={List} />
-                    <Route exact path="/namespaces/create" component={Create} />
-                </div>
-            </Router>
-        );
-    }
-}
-
-export default function() {
-    ReactDOM.render(
-        <I18nextProvider i18n={ i18n }><Namespaces/></I18nextProvider>,
-        document.getElementById('root')
-    );
-};
-
-
diff --git a/client/src/namespaces/Create.js b/client/src/namespaces/Create.js
new file mode 100644
index 00000000..c3951b41
--- /dev/null
+++ b/client/src/namespaces/Create.js
@@ -0,0 +1,20 @@
+'use strict';
+
+import React, { Component } from 'react';
+import { translate } from 'react-i18next';
+import { Title } from "../lib/page";
+import csfrToken from 'csfrToken';
+
+@translate()
+export default class Create extends Component {
+    render() {
+        const t = this.props.t;
+        console.log('csfrToken = ' + csfrToken);
+
+        return (
+            <div>
+                <Title>{t('Create Namespace')}</Title>
+            </div>
+        );
+    }
+}
diff --git a/client/src/namespaces/Edit.js b/client/src/namespaces/Edit.js
new file mode 100644
index 00000000..31ead60f
--- /dev/null
+++ b/client/src/namespaces/Edit.js
@@ -0,0 +1,60 @@
+'use strict';
+
+import React, { Component } from 'react';
+import { translate } from 'react-i18next';
+import csfrToken from 'csfrToken';
+import { withForm, Form, InputField, TextArea, ButtonRow, Button } from '../lib/form';
+import { Title } from "../lib/page";
+
+@translate()
+@withForm
+export default class Edit extends Component {
+    constructor(props) {
+        super(props);
+
+        this.nsId = parseInt(this.props.match.params.nsId);
+
+        this.initFormState();
+        this.populateFormStateFromURL(`/namespaces/rest/namespaces/${this.nsId}`);
+    }
+
+
+    validateFormState(state) {
+        const t = this.props.t;
+
+        if (!state.getIn(['name','value']).trim()) {
+            state.setIn(['name', 'error'], t('Name must not be empty'));
+        } else {
+            state.setIn(['name', 'error'], null);
+        }
+    }
+
+    submitHandler(evt) {
+        evt.preventDefault();
+        this.showFormValidation();
+    }
+
+    deleteHandler() {
+        this.hideFormValidation();
+    }
+
+    render() {
+        const t = this.props.t;
+
+        return (
+            <div>
+                <Title>{t('Edit Namespace')}</Title>
+
+                <Form stateOwner={this} onSubmit={::this.submitHandler}>
+                    <InputField id="name" label={t('Name')} description={t('Namespace Name')}/>
+                    <TextArea id="description" label={t('Description')} description={t('Description')}/>
+
+                    <ButtonRow>
+                        <Button type="submit" className="btn-primary" icon="ok" label={t('Update')}/>
+                        <Button className="btn-danger" icon="remove" label={t('Delete Namespace')} onClick={::this.deleteHandler}/>
+                    </ButtonRow>
+                </Form>
+            </div>
+        );
+    }
+}
diff --git a/client/src/namespaces/List.js b/client/src/namespaces/List.js
new file mode 100644
index 00000000..a8e09a61
--- /dev/null
+++ b/client/src/namespaces/List.js
@@ -0,0 +1,25 @@
+'use strict';
+
+import React, { Component } from 'react';
+import { translate } from 'react-i18next';
+import NamespacesTreeTable from './NamespacesTreeTable';
+import { Title, Toolbar, NavButton } from "../lib/page";
+
+@translate()
+export default class List extends Component {
+    render() {
+        const t = this.props.t;
+
+        return (
+            <div>
+                <Toolbar>
+                    <NavButton linkTo="/namespaces/create" className="btn-primary" icon="plus" label={t('Create Namespace')}/>
+                </Toolbar>
+
+                <Title>{t('Namespaces')}</Title>
+
+                <NamespacesTreeTable />
+            </div>
+        );
+    }
+}
diff --git a/client/src/namespaces/NamespacesTreeTable.js b/client/src/namespaces/NamespacesTreeTable.js
index 7de1c471..db323cab 100644
--- a/client/src/namespaces/NamespacesTreeTable.js
+++ b/client/src/namespaces/NamespacesTreeTable.js
@@ -7,30 +7,29 @@ import jQuery from 'jquery';
 import '../../public/jquery/jquery-ui-1.12.1.min.js';
 import '../../public/fancytree/jquery.fancytree-all.min.js';
 import '../../public/fancytree/skin-bootstrap/ui.fancytree.min.css';
+import axios from 'axios';
 
-translate();
-class NamespacesTreeTable extends Component {
+@translate()
+export default class NamespacesTreeTable extends Component {
     constructor(props) {
         super(props);
 
         this.state = {
-            treeData: [
-                {title: 'A', key: '1', expanded: true},
-                {title: 'B', key: '2', expanded: true, folder: true, children: [
-                    {title: 'BA', key: '3', expanded: true, folder: true, children: [
-                        {title: 'BAA', key: '4', expanded: true},
-                        {title: 'BAB', key: '5', expanded: true}
-                    ]},
-                    {title: 'BB', key: '6', expanded: true, folder: true, children: [
-                        {title: 'BBA', key: '7', expanded: true},
-                        {title: 'BBB', key: '8', expanded: true}
-                    ]}
-                ]}
-            ]
+            treeData: []
         };
+
+        axios.get('/namespaces/rest/namespacesTree')
+            .then(response => {
+                this.setState({
+                    treeData: response.data
+                });
+
+            });
     }
 
     componentDidMount() {
+        const history = this.props.history;
+
         const glyphOpts = {
             map: {
                 expanderClosed: 'glyphicon glyphicon-menu-right',
@@ -49,8 +48,15 @@ class NamespacesTreeTable extends Component {
             source: this.state.treeData,
             table: {
                 nodeColumnIdx: 0
+            },
+            createNode: (event, data) => {
+                const node = data.node;
+                const tdList = jQuery(node.tr).find(">td");
+                tdList.eq(1).html('<a href="#">Edit</a>').click(() => {
+                    history.push('/namespaces/edit/' + node.key);
+                });
             }
-        });
+        }).fancytree("getTree");
     }
 
     componentDidUpdate() {
@@ -58,13 +64,15 @@ class NamespacesTreeTable extends Component {
     }
 
     render() {
+        const t = this.props.t;
+
         const container =
             <div ref={(domElem) => { this.domTableContainer = domElem; }} style={{ height: '100px', overflow: 'auto'}}>
                 <table ref={(domElem) => { this.domTable = domElem; }} className="table table-hover table-striped table-condensed">
                     <thead>
                     <tr>
-                        <th>Name</th>
-                        <th>B</th>
+                        <th>{t('Name')}</th>
+                        <th></th>
                     </tr>
                     </thead>
                     <tbody>
@@ -81,6 +89,4 @@ class NamespacesTreeTable extends Component {
         );
     }
 
-}
-
-export default NamespacesTreeTable;
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/client/src/namespaces/root.js b/client/src/namespaces/root.js
new file mode 100644
index 00000000..bca0f726
--- /dev/null
+++ b/client/src/namespaces/root.js
@@ -0,0 +1,46 @@
+'use strict';
+
+import React from 'react';
+import ReactDOM from 'react-dom';
+import { I18nextProvider } from 'react-i18next';
+import i18n from '../lib/i18n';
+
+import { Section } from '../lib/page'
+import Create from './Create'
+import Edit from './Edit'
+import List from './List'
+
+const getStructure = t => ({
+    '': {
+        title: t('Home'),
+        externalLink: '/',
+        children: {
+            'namespaces': {
+                title: t('Namespaces'),
+                link: '/namespaces',
+                component: List,
+                children: {
+                    'edit' : {
+                        title: t('Edit Namespace'),
+                        params: [':nsId'],
+                        component: Edit
+                    },
+                    'create' : {
+                        title: t('Create Namespace'),
+                        link: '/namespaces/create',
+                        component: Create
+                    }
+                }
+            }
+        }
+    }
+});
+
+export default function() {
+    ReactDOM.render(
+        <I18nextProvider i18n={ i18n }><Section structure={getStructure}/></I18nextProvider>,
+        document.getElementById('root')
+    );
+};
+
+
diff --git a/client/webpack.config.js b/client/webpack.config.js
index bc5a2fbe..de533d05 100644
--- a/client/webpack.config.js
+++ b/client/webpack.config.js
@@ -3,7 +3,7 @@ const path = require('path');
 
 module.exports = {
     entry: {
-        namespaces: './src/namespaces.js'
+        namespaces: './src/namespaces/root.js'
     },
     output: {
         library: 'MailtrainReactBody',
@@ -18,7 +18,8 @@ module.exports = {
         ]
     },
     externals: {
-        jquery: 'jQuery'
+        jquery: 'jQuery',
+        csfrToken: 'csfrToken'
     },
     plugins: [
 //        new webpack.optimize.UglifyJsPlugin(),
diff --git a/lib/InteroperableError.js b/lib/InteroperableError.js
new file mode 100644
index 00000000..38d92360
--- /dev/null
+++ b/lib/InteroperableError.js
@@ -0,0 +1,11 @@
+'use strict';
+
+class InteroperableError extends Error {
+    constructor(type, msg, data) {
+        super(msg);
+        this.type = type;
+        this.data = data;
+    }
+}
+
+module.exports = InteroperableError;
\ No newline at end of file
diff --git a/lib/helpers.js b/lib/helpers.js
index 786e3473..f6abe4e8 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -23,7 +23,8 @@ module.exports = {
     injectCustomFormTemplates,
     filterCustomFields,
     getMjmlTemplate,
-    rollbackAndReleaseConnection
+    rollbackAndReleaseConnection,
+    filterObject
 };
 
 function getDefaultMergeTags(callback) {
@@ -293,3 +294,14 @@ function rollbackAndReleaseConnection(connection, callback) {
         return callback();
     });
 }
+
+function filterObject(obj, allowedKeys) {
+    const result = {};
+    for (const key in obj) {
+        if (allowedKeys.has(key)) {
+            result[key] = obj[key];
+        }
+    }
+
+    return result;
+}
diff --git a/lib/models/namespaces.js b/lib/models/namespaces.js
index 5d1d9f7c..865ff7b2 100644
--- a/lib/models/namespaces.js
+++ b/lib/models/namespaces.js
@@ -1,5 +1,76 @@
 'use strict';
 
 const knex = require('../knex');
+const hasher = require('node-object-hash')();
+const { filterObject } = require('../helpers');
+const InteroperableError = require('../InteroperableError');
 
-module.exports.list = () => knex('namespaces');
+class ChangedError extends InteroperableError {
+    constructor(msg, data) {
+        super('namespaces.ChangedError', msg, data);
+    }
+}
+
+class NotFoundError extends InteroperableError {
+    constructor(msg, data) {
+        super('namespaces.NotFoundError', msg, data);
+    }
+}
+
+const allowedKeys = new Set(['id', 'name', 'description', 'parent']);
+const allowedUpdateKeys = new Set(['name', 'description', 'parent']);
+
+async function list() {
+    return await knex('namespaces');
+}
+
+function hash(ns) {
+    return hasher.hash(filterObject(ns, allowedKeys));
+}
+
+async function getById(nsId) {
+    const ns = await knex('namespaces').where('id', nsId).first();
+    if (!ns) {
+        throw new NotFoundError();
+    }
+
+    ns.hash = hash(ns);
+
+    return ns;
+}
+
+async function create(ns) {
+    const nsId = await knex('namespaces').insert(filterObject(ns, allowedKeys));
+    return nsId;
+}
+
+async function updateWithConsistencyCheck(ns) {
+    await knex.transaction(async tx => {
+        const existingNs = await tx('namespaces').where('id', ns.id).first();
+        if (!ns) {
+            throw new NotFoundError();
+        }
+
+        const existingNsHash = hash(existingNs);
+        if (existingNsHash != ns.originalHash) {
+            throw new ChangedError();
+        }
+
+        tx('namespaces').where('id', ns.id).update(filterObject(ns, allowedUpdateKeys));
+    });
+}
+
+async function remove(nsId) {
+    await knex('namespaces').where('id', nsId).del();
+}
+
+module.exports = {
+    NotFoundError,
+    ChangedError,
+    hash,
+    list,
+    getById,
+    create,
+    updateWithConsistencyCheck,
+    remove
+};
\ No newline at end of file
diff --git a/lib/router-async.js b/lib/router-async.js
index 12e9e428..b6c53189 100644
--- a/lib/router-async.js
+++ b/lib/router-async.js
@@ -1,6 +1,7 @@
 'use strict';
 
 const express = require('express');
+const InteroperableError = require('./InteroperableError');
 
 function safeHandler(handler) {
     return function(req, res) {
@@ -8,12 +9,45 @@ function safeHandler(handler) {
     };
 }
 
+function safeJSONHandler(handler) {
+    return function(req, res) {
+        handler(req, res).catch(error => {
+            const resp = {
+                message: error.message
+            };
+
+            if (error instanceof InteroperableError) {
+                resp.type = error.type;
+                resp.data = error.data;
+            }
+
+            res.status(500).json(resp);
+        });
+    };
+}
+
+function replaceLast(elems, replaceFn) {
+    if (elems.length === 0) {
+        return elems;
+    }
+
+    const lastElem = elems[elems.size - 1];
+    const replacement = replaceFn(lastElem);
+
+    elems[elems.size - 1] = replacement;
+
+    return elems;
+}
+
 function create() {
     const router = new express.Router();
 
-    router.getAsync = (path, asyncFn) => router.get(path, safeHandler(asyncFn));
+    router.getAsync = (path, ...handlers) => router.get(path, ...replaceLast(handlers, safeHandler));
 
-    router.postAsync = (path, asyncFn) => router.post(path, safeHandler(asyncFn));
+    router.getAsyncJSON = (path, ...handlers) => router.get(path, ...replaceLast(handlers, safeJSONHandler));
+    router.postAsyncJSON = (path, ...handlers) => router.post(path, ...replaceLast(handlers, safeJSONHandler));
+    router.putAsyncJSON = (path, ...handlers) => router.put(path, ...replaceLast(handlers, safeJSONHandler));
+    router.deleteAsyncJSON = (path, ...handlers) => router.delete(path, ...replaceLast(handlers, safeJSONHandler));
 
     return router;
 }
diff --git a/package.json b/package.json
index 64ab2b97..259519e2 100644
--- a/package.json
+++ b/package.json
@@ -97,6 +97,7 @@
     "mysql": "^2.13.0",
     "node-gettext": "^2.0.0-rc.1",
     "node-mocks-http": "^1.6.1",
+    "node-object-hash": "^1.2.0",
     "nodemailer": "^3.1.8",
     "nodemailer-openpgp": "^1.0.2",
     "npmlog": "^4.0.2",
diff --git a/routes/namespaces.js b/routes/namespaces.js
index 565fd898..a34b94f1 100644
--- a/routes/namespaces.js
+++ b/routes/namespaces.js
@@ -14,15 +14,50 @@ router.all('/*', (req, res, next) => {
     next();
 });
 
-router.getAsync('/', async (req, res) => {
-    res.render('react-root', {
-        title: _('Namespaces'),
-        reactEntryPoint: 'namespaces'
-    });
+router.getAsyncJSON('/rest/namespaces/:nsId', async (req, res) => {
+   const ns = await namespaces.getById(req.params.nsId);
+   return res.json(ns);
 });
 
-router.getAsync('/list/ajax', async (req, res) => {
+router.postAsyncJSON('/rest/namespaces', passport.csrfProtection, async (req, res) => {
+   console.log(req.body);
+    // await namespaces.create(req.body);
+    return res.json();
+});
+
+router.putAsyncJSON('/rest/namespaces/:nsId', passport.csrfProtection, async (req, res) => {
+    console.log(req.body);
+    ns = req.body;
+    ns.id = req.params.nsId;
+
+    // await namespaces.updateWithConsistencyCheck(ns);
+    return res.json();
+});
+
+router.deleteAsyncJSON('/rest/namespaces/:nsId', passport.csrfProtection, async (req, res) => {
+    console.log(req.body);
+    // await namespaces.remove(req.params.nsId);
+    return res.json();
+});
+
+router.getAsyncJSON('/rest/namespacesTree', async (req, res) => {
     const entries = {};
+
+    /* Example of roots:
+    [
+        {title: 'A', key: '1', expanded: true},
+        {title: 'B', key: '2', expanded: true, folder: true, children: [
+            {title: 'BA', key: '3', expanded: true, folder: true, children: [
+                {title: 'BAA', key: '4', expanded: true},
+                {title: 'BAB', key: '5', expanded: true}
+            ]},
+            {title: 'BB', key: '6', expanded: true, folder: true, children: [
+                {title: 'BBA', key: '7', expanded: true},
+                {title: 'BBB', key: '8', expanded: true}
+            ]}
+        ]}
+    ]
+    */
     const roots = [];
 
     const rows = await namespaces.list();
@@ -58,6 +93,12 @@ router.getAsync('/list/ajax', async (req, res) => {
     return res.json(roots);
 });
 
-router.getAsync('')
+router.getAsync('/*', passport.csrfProtection, async (req, res) => {
+    res.render('react-root', {
+        title: _('Namespaces'),
+        reactEntryPoint: 'namespaces',
+        reactCsrfToken: req.csrfToken()
+    });
+});
 
 module.exports = router;
diff --git a/views/layout.hbs b/views/layout.hbs
index 90555e6a..f9efabd5 100644
--- a/views/layout.hbs
+++ b/views/layout.hbs
@@ -21,6 +21,11 @@
         <script src="/javascript/jquery-2.2.1.min.js"></script>
         <script src="/bootstrap/js/bootstrap.min.js"></script>
         <script src="/mailtrain/common.js"></script>
+
+        <script>
+            window.csfrToken = '{{reactCsrfToken}}';
+        </script>
+
         <script src="/mailtrain/{{reactEntryPoint}}.js"></script>
     {{else}}
         <link rel="stylesheet" href="/bootstrap/themes/united.min.css">
diff --git a/views/namespaces/edit.hbs b/views/namespaces/edit.hbs
deleted file mode 100644
index 9d339a3b..00000000
--- a/views/namespaces/edit.hbs
+++ /dev/null
@@ -1,39 +0,0 @@
-<ol class="breadcrumb">
-    <li><a href="/">{{#translate}}Home{{/translate}}</a></li>
-    <li>{{#translate}}Namespaces{{/translate}}</li>
-    <li class="active">{{#translate}}Edit Namespace{{/translate}}</li>
-</ol>
-
-<div class="pull-right">
-    <a class="btn btn-primary" href="/reports/create" role="button"><i class="glyphicon glyphicon-plus"></i> {{#translate}}Create Namespace{{/translate}}</a>
-</div>
-
-<h2>{{#translate}}Namespaces{{/translate}}</h2>
-
-<hr>
-
-<form method="post" class="delete-form" id="namespaces-delete" action="/namespaces/delete">
-    <input type="hidden" name="_csrf" value="{{csrfToken}}">
-    <input type="hidden" name="id" value="{{id}}" />
-</form>
-
-<form class="form-horizontal" method="post" action="/namespaces/edit">
-    <input type="hidden" name="_csrf" value="{{csrfToken}}">
-    <input type="hidden" name="id" value="{{id}}" />
-
-    <div>
-
-        
-
-        <hr/>
-
-        <div class="form-group">
-            <div class="col-sm-offset-2 col-sm-10">
-                <div class="pull-right">
-                    <button type="submit" form="namespaces-delete" class="btn btn-danger"><i class="glyphicon glyphicon-remove"></i> {{#translate}}Delete Namespace{{/translate}}</button>
-                </div>
-                <button type="submit" class="btn btn-primary"><i class="glyphicon glyphicon-ok"></i> {{#translate}}Update{{/translate}}</button>
-            </div>
-        </div>
-    </div>
-</form>
diff --git a/views/namespaces/namespaces.hbs b/views/namespaces/namespaces.hbs
deleted file mode 100644
index 7a1edbde..00000000
--- a/views/namespaces/namespaces.hbs
+++ /dev/null
@@ -1,86 +0,0 @@
-<ol class="breadcrumb">
-    <li><a href="/">{{#translate}}Home{{/translate}}</a></li>
-    <li class="active">{{#translate}}Namespaces{{/translate}}</li>
-</ol>
-
-<div class="pull-right">
-    <a class="btn btn-primary" href="/reports/create" role="button"><i class="glyphicon glyphicon-plus"></i> {{#translate}}Create Namespace{{/translate}}</a>
-</div>
-
-<h2>{{#translate}}Namespaces{{/translate}}</h2>
-
-<hr>
-
-<div id="treetable-container" style="height: 100px; overflow: auto;">
-    <table id="treetable" class="table table-hover table-striped table-condensed">
-        <thead>
-        <tr>
-            <th>Name</th>
-            <th>B</th>
-        </tr>
-        </thead>
-        <tbody>
-        <tr>
-            <td></td>
-            <td></td>
-        </tr>
-        </tbody>
-    </table>
-</div>
-
-<script>
-    document.addEventListener('DOMContentLoaded', function() {
-
-        glyph_opts = {
-            map: {
-                expanderClosed: 'glyphicon glyphicon-menu-right',
-                expanderLazy: 'glyphicon glyphicon-menu-right',  // glyphicon-plus-sign
-                expanderOpen: 'glyphicon glyphicon-menu-down',  // glyphicon-collapse-down
-            }
-        };
-
-        /*
-
-            $('#treetable').fancytree({
-                extensions: ['glyph', 'table'],
-                glyph: glyph_opts,
-                selectMode: 1,
-                icon: false,
-                autoScroll: true,
-                scrollParent: $("#treetable-container"),
-                source: [
-                    {title: 'A', key: '1', expanded: true},
-                    {title: 'B', key: '2', expanded: true, folder: true, children: [
-                        {title: 'BA', key: '3', expanded: true, folder: true, children: [
-                            {title: 'BAA', key: '4', expanded: true},
-                            {title: 'BAB', key: '5', expanded: true}
-                        ]},
-                        {title: 'BB', key: '6', expanded: true, folder: true, children: [
-                            {title: 'BBA', key: '7', expanded: true},
-                            {title: 'BBB', key: '8', expanded: true}
-                        ]}
-                    ]}
-                ],
-                table: {
-                    nodeColumnIdx: 0
-                }
-            });
-*/
-
-        $('#treetable').fancytree({
-            extensions: ['glyph', 'table'],
-            glyph: glyph_opts,
-            selectMode: 1,
-            icon: false,
-            autoScroll: true,
-            scrollParent: $("#treetable-container"),
-            source: {
-                url: "/namespaces/list/ajax",
-                cache: true
-            },
-            table: {
-                nodeColumnIdx: 0
-            }
-        });
-});
-</script>
\ No newline at end of file