diff --git a/.eslintrc.json b/.eslintrc.json
index 7a3bed9..9d8ed29 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -6,12 +6,10 @@
   "parserOptions": {
     "sourceType": "script"
   },
-  "plugins": ["prettier"],
   "rules": {
     "no-shadow": ["error", { "allow": ["err"] }],
     "handle-callback-err": "error",
     "prefer-arrow-callback": "error",
-    "curly": ["error", "multi", "consistent"],
-    "prettier/prettier": "error"
+    "curly": ["error", "multi", "consistent"]
   }
 }
diff --git a/client/.eslintrc.json b/client/.eslintrc.json
index dcd577e..6881637 100644
--- a/client/.eslintrc.json
+++ b/client/.eslintrc.json
@@ -1,6 +1,9 @@
 {
   "env": {
-    "browser": true,
-    "commonjs": true
+    "browser": true
+  },
+  "parserOptions": {
+    "sourceType": "module",
+    "ecmaVersion": 8
   }
 }
diff --git a/client/app.js b/client/app.js
index 5f20515..2781f38 100644
--- a/client/app.js
+++ b/client/app.js
@@ -1,5 +1,43 @@
 "use strict";
 
-const m = require("mithril");
+import m from "mithril";
 
-m.render(document.body, "hello world");
+import layout from "./layout";
+import * as overviewPage from "./overview-page";
+import * as devicesPage from "./devices-page";
+import * as errorPage from "./error-page";
+
+let state;
+
+function pagify(pageName, page) {
+  const component = {
+    render: () => {
+      if (state && state.error) return m(errorPage.component, state);
+      else return m(layout, { page: pageName }, m(page.component, state));
+    }
+  };
+
+  if (page.init)
+    component.onmatch = args => {
+      return new Promise(resolve => {
+        page
+          .init(args)
+          .then(st => {
+            if (!st) return m.reoute.set("/");
+            state = st;
+            resolve();
+          })
+          .catch(err => {
+            state = { error: err.message };
+            resolve();
+          });
+      });
+    };
+
+  return component;
+}
+
+m.route(document.body, "/overview", {
+  "/overview": pagify("overview", overviewPage),
+  "/devices": pagify("devices", devicesPage)
+});
diff --git a/client/config.js b/client/config.js
new file mode 100644
index 0000000..20f5748
--- /dev/null
+++ b/client/config.js
@@ -0,0 +1,24 @@
+"use strict";
+
+export default {
+  pageSize: 10,
+  index: [
+    {
+      label: "Serial number",
+      parameter: "DeviceID.SerialNumber"
+    },
+    {
+      label: "Product class",
+      parameter: "DeviceID.ProductClass"
+    },
+    {
+      label: "Software version",
+      parameter: "InternetGatewayDevice.DeviceInfo.SoftwareVersion"
+    },
+    {
+      label: "MAC",
+      parameter:
+        "InternetGatewayDevice.WANDevice.1.WANConnectionDevice.1.WANIPConnection.1.MACAddress"
+    }
+  ]
+};
diff --git a/client/css/app.css b/client/css/app.css
new file mode 100644
index 0000000..5454683
--- /dev/null
+++ b/client/css/app.css
@@ -0,0 +1,202 @@
+@import "normalize.css";
+
+:root {
+  --base-font-size: 13px;
+  --base-line-height: 16px;
+
+  --color1: #ebe0bf;
+  --color2: #b9b098;
+  --color3: #f2ebd5;
+  --color4: #046380;
+  --color5: #002f2f;
+
+  --fade: 0.2s;
+}
+
+body,
+input,
+button,
+select,
+option,
+textarea {
+  font-family: sans-serif;
+  color: var(--color5);
+}
+
+a {
+  color: var(--color4);
+  cursor: pointer;
+  transition: background-color var(--fade), color var(--fade);
+  &:visited {
+    color: var(--color4);
+  }
+  &:hover {
+    color: white;
+    background-color: var(--color4);
+  }
+}
+
+strong,
+b {
+  font-weight: bold;
+}
+
+i {
+  font-style: italic;
+}
+
+#header {
+  background-color: #f2eddf;
+  border-bottom: 1px solid var(--color1);
+  overflow: visible;
+  position: relative;
+
+  & > nav {
+    display: inline-block;
+    overflow: visible;
+    position: absolute;
+    bottom: -1px;
+
+    & > ul {
+      font-weight: bold;
+      display: inline-block;
+      margin: 0 10px;
+      padding: 0;
+
+      & > li {
+        margin: 0 2px;
+        background-color: var(--color1);
+        display: inline-block;
+        border-top-left-radius: 6px;
+        border-top-right-radius: 6px;
+        transition: background-color var(--fade);
+        &.active,
+        &:hover {
+          background-color: white;
+        }
+
+        & > a,
+        & > a:visited,
+        & > a:hover {
+          display: inline-block;
+          min-width: 140px;
+          color: var(--color4);
+          text-decoration: none;
+          background: none;
+          padding: 8px;
+        }
+      }
+    }
+  }
+  & > .logo {
+    margin: 10px;
+    display: inline;
+    height: 56px;
+  }
+}
+
+#content {
+  margin: 10px;
+  min-height: 250px;
+}
+
+table.table {
+  border-spacing: 0;
+  text-align: left;
+
+  & th {
+    color: var(--color4);
+    font-weight: bold;
+    border-bottom: 2px solid var(--color4);
+    margin: 0;
+    padding: 0.2em 0.5em;
+  }
+
+  & td {
+    margin: 0;
+    padding: 0.2em 0.5em;
+    border-bottom: 1px dotted var(--color1);
+    & .action a {
+      visibility: hidden;
+    }
+  }
+
+  & tbody tr:hover td {
+    & .action {
+      visibility: visible;
+    }
+
+    transition: background-color var(--fade);
+    background-color: var(--color3);
+  }
+
+  & tfoot td > a {
+    margin-left: 1em;
+  }
+}
+
+h1 {
+  color: var(--color4);
+  font-size: 130%;
+  font-weight: bold;
+  margin-top: 1em;
+  margin-bottom: 0.5em;
+}
+
+h2 {
+  color: var(--color5);
+  font-weight: bold;
+  margin-top: 1em;
+  margin-bottom: 0.5em;
+}
+
+h3 {
+  color: var(--color5);
+  margin-top: 1em;
+  margin-bottom: 0.5em;
+}
+
+/* Remove button padding in FF */
+input::-moz-focus-inner {
+  border: 0;
+  padding: 0;
+}
+
+input[type="button"],
+button {
+  display: inline-block;
+  min-width: 6em;
+  position: relative;
+  top: 0px;
+  vertical-align: baseline;
+  margin: 0 0.1em;
+  outline: none;
+  cursor: pointer;
+  text-align: center;
+  text-decoration: none;
+  padding: 0.1em 0.6em;
+  border-top-left-radius: 1em;
+  border-bottom-right-radius: 1em;
+  border-top-right-radius: 0.2em;
+  border-bottom-left-radius: 0.2em;
+
+  color: var(--color4);
+  transition: background-color var(--fade), color var(--fade);
+
+  &:link,
+  &:visited {
+    color: var(--color4);
+    background-color: var(--color1);
+  }
+
+  &:hover,
+  &:active {
+    color: var(--color1);
+    background-color: var(--color4);
+  }
+
+  &:disabled {
+    background-color: var(--color1);
+    color: var(--color2);
+  }
+}
diff --git a/client/css/normalize.css b/client/css/normalize.css
new file mode 100644
index 0000000..04beed5
--- /dev/null
+++ b/client/css/normalize.css
@@ -0,0 +1,450 @@
+/*! normalize.css v7.0.0 | MIT License | github.com/necolas/normalize.css */
+
+/* Document
+   ========================================================================== */
+
+/**
+ * 1. Correct the line height in all browsers.
+ * 2. Prevent adjustments of font size after orientation changes in
+ *    IE on Windows Phone and in iOS.
+ */
+
+html {
+  line-height: 1.15; /* 1 */
+  -ms-text-size-adjust: 100%; /* 2 */
+  -webkit-text-size-adjust: 100%; /* 2 */
+}
+
+/* Sections
+   ========================================================================== */
+
+/**
+ * Remove the margin in all browsers (opinionated).
+ */
+
+body {
+  margin: 0;
+}
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+article,
+aside,
+footer,
+header,
+nav,
+section {
+  display: block;
+}
+
+/**
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
+ */
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+/* Grouping content
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in IE.
+ */
+
+figcaption,
+figure,
+main {
+  /* 1 */
+  display: block;
+}
+
+/**
+ * Add the correct margin in IE 8.
+ */
+
+figure {
+  margin: 1em 40px;
+}
+
+/**
+ * 1. Add the correct box sizing in Firefox.
+ * 2. Show the overflow in Edge and IE.
+ */
+
+hr {
+  box-sizing: content-box; /* 1 */
+  height: 0; /* 1 */
+  overflow: visible; /* 2 */
+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+pre {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+/* Text-level semantics
+   ========================================================================== */
+
+/**
+ * 1. Remove the gray background on active links in IE 10.
+ * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
+ */
+
+a {
+  background-color: transparent; /* 1 */
+  -webkit-text-decoration-skip: objects; /* 2 */
+}
+
+/**
+ * 1. Remove the bottom border in Chrome 57- and Firefox 39-.
+ * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
+ */
+
+abbr[title] {
+  border-bottom: none; /* 1 */
+  text-decoration: underline; /* 2 */
+  text-decoration: underline dotted; /* 2 */
+}
+
+/**
+ * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
+ */
+
+b,
+strong {
+  font-weight: inherit;
+}
+
+/**
+ * Add the correct font weight in Chrome, Edge, and Safari.
+ */
+
+b,
+strong {
+  font-weight: bolder;
+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+code,
+kbd,
+samp {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+/**
+ * Add the correct font style in Android 4.3-.
+ */
+
+dfn {
+  font-style: italic;
+}
+
+/**
+ * Add the correct background and color in IE 9-.
+ */
+
+mark {
+  background-color: #ff0;
+  color: #000;
+}
+
+/**
+ * Add the correct font size in all browsers.
+ */
+
+small {
+  font-size: 80%;
+}
+
+/**
+ * Prevent `sub` and `sup` elements from affecting the line height in
+ * all browsers.
+ */
+
+sub,
+sup {
+  font-size: 75%;
+  line-height: 0;
+  position: relative;
+  vertical-align: baseline;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+sup {
+  top: -0.5em;
+}
+
+/* Embedded content
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+audio,
+video {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
+/**
+ * Remove the border on images inside links in IE 10-.
+ */
+
+img {
+  border-style: none;
+}
+
+/**
+ * Hide the overflow in IE.
+ */
+
+svg:not(:root) {
+  overflow: hidden;
+}
+
+/* Forms
+   ========================================================================== */
+
+/**
+ * 1. Change the font styles in all browsers (opinionated).
+ * 2. Remove the margin in Firefox and Safari.
+ */
+
+button,
+input,
+optgroup,
+select,
+textarea {
+  font-family: sans-serif; /* 1 */
+  font-size: 100%; /* 1 */
+  line-height: 1.15; /* 1 */
+  margin: 0; /* 2 */
+}
+
+/**
+ * Show the overflow in IE.
+ * 1. Show the overflow in Edge.
+ */
+
+button,
+input {
+  /* 1 */
+  overflow: visible;
+}
+
+/**
+ * Remove the inheritance of text transform in Edge, Firefox, and IE.
+ * 1. Remove the inheritance of text transform in Firefox.
+ */
+
+button,
+select {
+  /* 1 */
+  text-transform: none;
+}
+
+/**
+ * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
+ *    controls in Android 4.
+ * 2. Correct the inability to style clickable types in iOS and Safari.
+ */
+
+button,
+html [type="button"],
+/* 1 */ [type="reset"],
+[type="submit"] {
+  -webkit-appearance: button; /* 2 */
+}
+
+/**
+ * Remove the inner border and padding in Firefox.
+ */
+
+button::-moz-focus-inner,
+[type="button"]::-moz-focus-inner,
+[type="reset"]::-moz-focus-inner,
+[type="submit"]::-moz-focus-inner {
+  border-style: none;
+  padding: 0;
+}
+
+/**
+ * Restore the focus styles unset by the previous rule.
+ */
+
+button:-moz-focusring,
+[type="button"]:-moz-focusring,
+[type="reset"]:-moz-focusring,
+[type="submit"]:-moz-focusring {
+  outline: 1px dotted ButtonText;
+}
+
+/**
+ * Correct the padding in Firefox.
+ */
+
+fieldset {
+  padding: 0.35em 0.75em 0.625em;
+}
+
+/**
+ * 1. Correct the text wrapping in Edge and IE.
+ * 2. Correct the color inheritance from `fieldset` elements in IE.
+ * 3. Remove the padding so developers are not caught out when they zero out
+ *    `fieldset` elements in all browsers.
+ */
+
+legend {
+  box-sizing: border-box; /* 1 */
+  color: inherit; /* 2 */
+  display: table; /* 1 */
+  max-width: 100%; /* 1 */
+  padding: 0; /* 3 */
+  white-space: normal; /* 1 */
+}
+
+/**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+
+progress {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
+/**
+ * Remove the default vertical scrollbar in IE.
+ */
+
+textarea {
+  overflow: auto;
+}
+
+/**
+ * 1. Add the correct box sizing in IE 10-.
+ * 2. Remove the padding in IE 10-.
+ */
+
+[type="checkbox"],
+[type="radio"] {
+  box-sizing: border-box; /* 1 */
+  padding: 0; /* 2 */
+}
+
+/**
+ * Correct the cursor style of increment and decrement buttons in Chrome.
+ */
+
+[type="number"]::-webkit-inner-spin-button,
+[type="number"]::-webkit-outer-spin-button {
+  height: auto;
+}
+
+/**
+ * 1. Correct the odd appearance in Chrome and Safari.
+ * 2. Correct the outline style in Safari.
+ */
+
+[type="search"] {
+  -webkit-appearance: textfield; /* 1 */
+  outline-offset: -2px; /* 2 */
+}
+
+/**
+ * Remove the inner padding and cancel buttons in Chrome and Safari on macOS.
+ */
+
+[type="search"]::-webkit-search-cancel-button,
+[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+/**
+ * 1. Correct the inability to style clickable types in iOS and Safari.
+ * 2. Change font properties to `inherit` in Safari.
+ */
+
+::-webkit-file-upload-button {
+  -webkit-appearance: button; /* 1 */
+  font: inherit; /* 2 */
+}
+
+/* Interactive
+   ========================================================================== */
+
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+
+details,
+/* 1 */ menu {
+  display: block;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Scripting
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+canvas {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+template {
+  display: none;
+}
+
+/* Hidden
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 10-.
+ */
+
+[hidden] {
+  display: none;
+}
diff --git a/client/devices-page.js b/client/devices-page.js
new file mode 100644
index 0000000..ad6223d
--- /dev/null
+++ b/client/devices-page.js
@@ -0,0 +1,115 @@
+"use strict";
+
+import m from "mithril";
+
+import config from "./config";
+
+function load(filter, limit) {
+  return new Promise((resolve, reject) => {
+    m
+      .request({
+        url: "/api/devices/",
+        data: { filter: JSON.stringify(filter), limit: limit }
+      })
+      .then(res => {
+        resolve(res);
+      })
+      .catch(err => {
+        err.message = err.message || "Unknown error";
+        reject(err);
+      });
+  });
+}
+
+function count(filter, limit) {
+  return new Promise((resolve, reject) => {
+    function extract(xhr) {
+      return +xhr.getResponseHeader("x-total-count");
+    }
+    m
+      .request({
+        method: "HEAD",
+        url: "/api/devices/",
+        data: { filter: JSON.stringify(filter), limit: limit },
+        extract: extract
+      })
+      .then(res => {
+        resolve(res);
+      })
+      .catch(err => {
+        err.message = err.message || "Unknown error";
+        reject(err);
+      });
+  });
+}
+
+function init(args) {
+  return new Promise((resolve, reject) => {
+    Promise.all([count(args.filter), load(args.filter, config.pageSize)])
+      .then(res => {
+        resolve({ filter: args.filter, total: res[0], devices: res[1] });
+      })
+      .catch(reject);
+  });
+}
+
+function renderTable(devices, parameters, total, showMoreCallback) {
+  let labels = [];
+  for (let param of parameters) labels.push(m("th", param.label));
+
+  let rows = [];
+  for (let device of devices)
+    rows.push(
+      m(
+        "tr",
+        parameters.map(p => {
+          if (!device[p.parameter] || !device[p.parameter].value)
+            return m("td.na");
+          if (!device[p.parameter].value[0] === "") return m("td.blank");
+          return m("td", device[p.parameter].value[0]);
+        })
+      )
+    );
+
+  let footerElements = [`${devices.length}/${total}`];
+
+  if (devices.length < total)
+    footerElements.push(m("a", { onclick: showMoreCallback }, "Show more"));
+
+  let tfoot = m(
+    "tfoot",
+    m("tr", m("td", { colspan: labels.length }, footerElements))
+  );
+
+  return m("table.table", [
+    m("thead", m("tr", labels)),
+    m("tbody", rows),
+    tfoot
+  ]);
+}
+
+const component = {
+  view: vnode => {
+    document.title = "Devices - GenieACS";
+    function showMore() {
+      const lastDevice = vnode.attrs.devices[vnode.attrs.devices.length - 1];
+      let f = Object.assign({}, vnode.attrs.filter, {
+        "DeviceID.ID>": lastDevice["DeviceID.ID"].value[0]
+      });
+      load(f, config.pageSize).then(res => {
+        vnode.attrs.devices = vnode.attrs.devices.concat(res);
+      });
+    }
+    return [
+      m("h1", "Listing devices"),
+      renderTable(
+        vnode.attrs.devices,
+        config.index,
+        vnode.attrs.total,
+        showMore
+      )
+    ];
+  }
+};
+
+export { init, component };
diff --git a/client/error-page.js b/client/error-page.js
new file mode 100644
index 0000000..4398d87
--- /dev/null
+++ b/client/error-page.js
@@ -0,0 +1,10 @@
+"use strict";
+
+const component = {
+  view: function(vnode) {
+    document.title = "Error! - GenieACS";
+    return vnode.attrs.error;
+  }
+};
+
+export { component };
diff --git a/client/layout.js b/client/layout.js
new file mode 100644
index 0000000..bacab47
--- /dev/null
+++ b/client/layout.js
@@ -0,0 +1,19 @@
+"use strict";
+
+import m from "mithril";
+
+import menu from "./menu";
+
+const layout = {
+  view: vnode => {
+    return [
+      m("#header", [
+        m("img.logo", { src: "logo.svg" }),
+        m(menu, { page: vnode.attrs.page })
+      ]),
+      m("#content", [vnode.children])
+    ];
+  }
+};
+
+export default layout;
diff --git a/client/menu.js b/client/menu.js
new file mode 100644
index 0000000..d7c32bb
--- /dev/null
+++ b/client/menu.js
@@ -0,0 +1,27 @@
+"use strict";
+
+import m from "mithril";
+
+const menu = {
+  view: vnode => {
+    const active = { [vnode.attrs.page]: "active" };
+
+    return m(
+      "nav",
+      m("ul", [
+        m(
+          "li",
+          { class: active["overview"] },
+          m("a", { href: "#!/overview" }, "Overview")
+        ),
+        m(
+          "li",
+          { class: active["devices"] },
+          m("a", { href: "#!/devices" }, "Devices")
+        )
+      ])
+    );
+  }
+};
+
+export default menu;
diff --git a/client/overview-page.js b/client/overview-page.js
new file mode 100644
index 0000000..35c091f
--- /dev/null
+++ b/client/overview-page.js
@@ -0,0 +1,22 @@
+"use strict";
+
+import m from "mithril";
+
+const init = function() {
+  return new Promise(resolve => {
+    resolve({ message: "Hello world!" });
+  });
+};
+
+const component = {
+  view: vnode => {
+    document.title = "Overview - GenieACS";
+    return m(
+      "a",
+      { href: "#!/devices/202BC1-BM632w-000000" },
+      vnode.attrs.message
+    );
+  }
+};
+
+export { init, component };
diff --git a/package.json b/package.json
index 75fa1d6..e7cc313 100644
--- a/package.json
+++ b/package.json
@@ -4,9 +4,9 @@
   "description": "",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "lint": "eslint --fix server/*.js client/*.js",
-    "build": "webpack",
-    "start": "npm run lint;npm run build;node server/server"
+    "lint": "eslint --fix server/*.js client/*.js;prettier --write server/*.js client/*.js client/css/*.css",
+    "build": "npm run lint;webpack;postcss -c postcss.config.js client/css/app.css -o public/app.css",
+    "start": "node server/server"
   },
   "author": "Zaid Abdulla <zaid@genieacs.com>",
   "dependencies": {
@@ -17,8 +17,11 @@
     "mithril": "^1.1.5"
   },
   "devDependencies": {
+    "cssnano": "^3.10.0",
     "eslint": "^4.12.1",
-    "eslint-plugin-prettier": "^2.3.1",
+    "postcss-cli": "^4.1.1",
+    "postcss-cssnext": "^3.0.2",
+    "postcss-import": "^11.0.0",
     "prettier": "^1.8.2",
     "webpack": "^3.9.1"
   }
diff --git a/postcss.config.js b/postcss.config.js
new file mode 100644
index 0000000..91a9f0d
--- /dev/null
+++ b/postcss.config.js
@@ -0,0 +1,7 @@
+module.exports = {
+  plugins: [
+    require("postcss-import"),
+    require("postcss-cssnext")({warnForDuplicates: false}),
+    require("cssnano")
+  ]
+}
diff --git a/public/favicon.png b/public/favicon.png
new file mode 100644
index 0000000..1f16570
Binary files /dev/null and b/public/favicon.png differ
diff --git a/public/index.html b/public/index.html
index 772daa5..cc4fe7c 100644
--- a/public/index.html
+++ b/public/index.html
@@ -1,5 +1,8 @@
 <html>
   <head>
+    <title>GenieACS</title>
+    <link rel="shortcut icon" type="image/png" href="favicon.png" />
+    <link rel="stylesheet" href="app.css">
   </head>
   <body>
     <script src="app.js"></script>
diff --git a/public/logo.svg b/public/logo.svg
new file mode 100644
index 0000000..2352be8
--- /dev/null
+++ b/public/logo.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="310" height="64" viewBox="0 0 82.020832 16.933334"><defs><linearGradient id="b"><stop offset="0" stop-color="#737373"/><stop offset="1" stop-color="#4b4b4b"/></linearGradient><linearGradient id="a"><stop offset="0" stop-color="#b72f5f"/><stop offset="1" stop-color="#872346"/></linearGradient><linearGradient xlink:href="#a" id="c" gradientUnits="userSpaceOnUse" gradientTransform="translate(173.233 -461.003) scale(.21343)" x1="16.045" y1="132.803" x2="16.045" y2="-81.164"/><linearGradient xlink:href="#a" id="d" gradientUnits="userSpaceOnUse" x1="46.459" y1="281.163" x2="46.459" y2="296.66" gradientTransform="translate(1.09 16.9) scale(.94143)"/><linearGradient xlink:href="#b" id="e" gradientUnits="userSpaceOnUse" gradientTransform="translate(11.105 -994.648) scale(3.55816)" x1="46.459" y1="281.163" x2="46.459" y2="296.66"/></defs><path d="M173.233-461.003l1.953-3.714c-.868-1.509-2.042-2.814-3.522-3.917-2.419-1.43-4.386-1.199-5.901.694 2.931 1.323 5.421 3.635 7.47 6.937m-7.577 11.151a6.095 6.095 0 0 0 .673-3.49 23.76 23.76 0 0 0-1.473-6.285 20.998 20.998 0 0 1-1.206-4.855 6.766 6.766 0 0 1 .48-3.426c.463-1.117 1.298-2.074 2.508-2.87-1.302-.392-2.44-.499-3.415-.32-1.707.326-2.82 1.354-3.34 3.083a10.152 10.152 0 0 0-.267 5.08 33.38 33.38 0 0 0 1.238 4.674 32.993 32.993 0 0 1 1.227 4.856c.107.626.118 1.277.032 1.953a4.72 4.72 0 0 1-.779 2.006 4.498 4.498 0 0 1-1.707 1.44c.697.129 1.387.235 2.07.32a4.124 4.124 0 0 0 2.07-.351c.84-.37 1.47-.975 1.89-1.815m22.463 5.123l.63-.62-5.25-4.77 1.579-1.579 4.77 5.25.619-.629-5.24-4.77 1.483-1.483 4.77 5.24.63-.62-5.25-4.77 1.58-1.58 5.015 5.016 1.067-1.045-4.503-4.504h.01l-5.87-5.859-3.563-1.462-5.102 3.831-.02.022-.022-.022.01-.02 3.394-4.526-1.131-.458-4.973 4.973 1.26 3.073 4.652-3.49.01-.01.033.02-.01.012-3.95 5.26.64 1.57 4.814 4.802h-.01l5.559 5.549 1.057-1.046-5.027-5.026 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\ No newline at end of file
diff --git a/server/api-functions.js b/server/api-functions.js
index 706a63b..131dfe1 100644
--- a/server/api-functions.js
+++ b/server/api-functions.js
@@ -6,6 +6,7 @@ const url = require("url");
 const querystring = require("querystring");
 
 const config = require("./config");
+const device = require("./device");
 
 const commaAscii = ",".charCodeAt(0);
 const newLineAscii = "\n".charCodeAt(0);
@@ -19,6 +20,7 @@ function filtersToQuery(filters) {
     for (let [k, v] of Object.entries(filter)) {
       let [param, op] = k.split(/([^a-zA-Z0-9\-_.].*)/, 2);
       if (!op || op === "=") q[param] = v;
+      else if (op === ">") q[param] = { $gt: v };
       else throw new Error(`Operator "${op}" not recognized`);
     }
     queries.push(q);
@@ -28,22 +30,63 @@ function filtersToQuery(filters) {
   else return { $or: queries };
 }
 
+function count(resource, filters, limit) {
+  return new Promise((resolve, reject) => {
+    let qs = {};
+    if (filters) {
+      let q = filtersToQuery(filters);
+      if (resource === "devices") q = device.transposeQuery(q);
+      qs.query = JSON.stringify(q);
+    }
+
+    if (limit) qs.limit = limit;
+
+    let options = url.parse(
+      `${config.GENIEACS_NBI}${resource}?${querystring.stringify(qs)}`
+    );
+
+    options.method = "HEAD";
+
+    let _http = options.protocol === "https:" ? https : http;
+
+    _http
+      .request(options, res => {
+        if (res.statusCode !== 200) {
+          reject(new Error(`Unexpected status code ${res.statusCode}`));
+          res.resume();
+          return;
+        }
+        resolve(+res.headers["total"]);
+      })
+      .end();
+  });
+}
+
 function query(resource, filters, limit, callback) {
   return new Promise((resolve, reject) => {
     let ret;
     if (!callback) ret = [];
-    let q = {};
-    if (filters) q.query = JSON.stringify(filtersToQuery(filters));
+    let qs = {};
+    if (filters) {
+      let q = filtersToQuery(filters);
+      if (resource === "devices") q = device.transposeQuery(q);
+      qs.query = JSON.stringify(q);
+    }
 
-    if (limit) q.limit = limit;
+    if (limit) qs.limit = limit;
 
     let options = url.parse(
-      `${config.GENIEACS_NBI}${resource}?${querystring.stringify(q)}`
+      `${config.GENIEACS_NBI}${resource}?${querystring.stringify(qs)}`
     );
 
     let _http = options.protocol === "https:" ? https : http;
 
     _http.get(options, res => {
+      if (res.statusCode !== 200) {
+        reject(new Error(`Unexpected status code ${res.statusCode}`));
+        res.resume();
+        return;
+      }
       let chunks = [];
       let bytes = 0;
       res.on("data", chunk => {
@@ -69,6 +112,7 @@ function query(resource, filters, limit, callback) {
 
           if (buf.length > 1) {
             let obj = JSON.parse(buf);
+            if (resource === "devices") obj = device.transpose(obj);
             if (ret) ret.push(obj);
             else callback(obj);
           }
@@ -89,6 +133,8 @@ function query(resource, filters, limit, callback) {
         }
         if (buf.length > 1) {
           let obj = JSON.parse(buf);
+          if (resource === "devices") obj = device.transpose(obj);
+
           if (ret) ret.push(obj);
           else callback(obj);
         }
@@ -104,3 +150,4 @@ function query(resource, filters, limit, callback) {
 }
 
 exports.query = query;
+exports.count = count;
diff --git a/server/api.js b/server/api.js
index cd09895..d7e3381 100644
--- a/server/api.js
+++ b/server/api.js
@@ -16,35 +16,35 @@ const resources = {
 
 for (let [resource, update] of Object.entries(resources)) {
   router.head(`/${resource}`, async ctx => {
-    let filters, limit;
-    if (ctx.request.query.query)
-      if (Array.isArray(ctx.request.query.query))
-        filters = ctx.request.query.query.map(q => JSON.parse(q));
+    let filter, limit;
+    if (ctx.request.query.filter)
+      if (Array.isArray(ctx.request.query.filter))
+        filter = ctx.request.query.query.map(q => JSON.parse(q));
       else {
-        filters = JSON.parse(ctx.request.query.query);
-        if (!Array.isArray(filters)) filters = [filters];
+        filter = JSON.parse(ctx.request.query.filter);
+        if (!Array.isArray(filter)) filter = [filter];
       }
 
     if (ctx.request.query.limit) limit = +ctx.request.query.limit;
 
-    let res = await apiFunctions.query(resource, filters, limit);
-    ctx.set("X-Total-Count", res.length);
+    let count = await apiFunctions.count(resource, filter, limit);
+    ctx.set("X-Total-Count", count);
     ctx.body = "";
   });
 
   router.get(`/${resource}`, async ctx => {
-    let filters, limit;
-    if (ctx.request.query.query)
-      if (Array.isArray(ctx.request.query.query))
-        filters = ctx.request.query.query.map(q => JSON.parse(q));
+    let filter, limit;
+    if (ctx.request.query.filter)
+      if (Array.isArray(ctx.request.query.filter))
+        filter = ctx.request.query.query.map(q => JSON.parse(q));
       else {
-        filters = JSON.parse(ctx.request.query.query);
-        if (!Array.isArray(filters)) filters = [filters];
+        filter = JSON.parse(ctx.request.query.filter);
+        if (!Array.isArray(filter)) filter = [filter];
       }
 
     if (ctx.request.query.limit) limit = +ctx.request.query.limit;
 
-    ctx.body = await apiFunctions.query(resource, filters, limit);
+    ctx.body = await apiFunctions.query(resource, filter, limit);
   });
 
   router.head(`/${resource}/:id`, async (ctx, next) => {
diff --git a/server/device.js b/server/device.js
new file mode 100644
index 0000000..aefea8f
--- /dev/null
+++ b/server/device.js
@@ -0,0 +1,152 @@
+"use strict";
+
+function recursive(input, root, output, timestamp) {
+  for (let [name, tree] of Object.entries(input)) {
+    if (root.length === 0)
+      if (name === "_lastInform") {
+        output["Events.Inform"] = {
+          value: [timestamp, "xsd:dateTime"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+      } else if (name === "_registered") {
+        output["Events.Registered"] = {
+          value: [timestamp, "xsd:dateTime"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+      } else if (name === "_lastBoot") {
+        output["Events.1_BOOT"] = {
+          value: [timestamp, "xsd:dateTime"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+      } else if (name === "_lastBootstrap") {
+        output["Events.0_BOOTSTRAP"] = {
+          value: [timestamp, "xsd:dateTime"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+      } else if (name === "_id") {
+        output["DeviceID.ID"] = {
+          value: [tree, "xsd:string"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+      } else if (name === "_deviceId") {
+        output["DeviceID.Manufacturer"] = {
+          value: [tree["_Manufacturer"], "xsd:string"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+        output["DeviceID.OUI"] = {
+          value: [tree["_OUI"], "xsd:string"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+        output["DeviceID.ProductClass"] = {
+          value: [tree["_ProductClass"], "xsd:string"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+        output["DeviceID.SerialNumber"] = {
+          value: [tree["_SerialNumber"], "xsd:string"],
+          valueTimestamp: timestamp,
+          writable: false,
+          writableTimestamp: timestamp,
+          object: false,
+          objectTimestamp: timestamp
+        };
+      } else if (name === "_tags") {
+        output["Tags"] = {
+          writable: true,
+          writableTimestamp: timestamp,
+          object: true,
+          objectTimestamp: timestamp
+        };
+
+        for (let t of tree)
+          output[`Tags.${t}`] = {
+            value: [true, "xsd:boolean"],
+            valueTimestamp: timestamp,
+            writable: false,
+            writableTimestamp: timestamp,
+            object: false,
+            objectTimestamp: timestamp
+          };
+      }
+
+    if (name.startsWith("_")) continue;
+
+    let childrenTimestamp = timestamp;
+
+    if (root.length === 0) childrenTimestamp = input["_timestamp"] || 1;
+    else if (input["_timestamp"] > timestamp)
+      childrenTimestamp = input["_timestamp"];
+
+    const attrs = {};
+    if (tree["_value"]) {
+      attrs["value"] = [tree["_value"], tree["_type"]];
+      attrs["valueTimestamp"] = childrenTimestamp;
+      attrs["object"] = false;
+      attrs["objectTimestamp"] = childrenTimestamp;
+    } else if (tree["_object"]) {
+      attrs["object"] = tree["_object"];
+      attrs["objectTimestamp"] = childrenTimestamp;
+    }
+
+    if (tree["_writable"]) {
+      attrs["writable"] = tree["_writable"];
+      attrs["writableTimestamp"] = childrenTimestamp;
+    }
+
+    let r = root.concat(name);
+    output[r.join(".")] = attrs;
+
+    if (attrs["object"]) recursive(tree, r, output, childrenTimestamp);
+  }
+}
+
+function transpose(device) {
+  const newDevice = {};
+  const timestamp = new Date(device["_lastInform"] || 1).getTime();
+  recursive(device, [], newDevice, timestamp);
+  return newDevice;
+}
+
+function transposeQuery(query) {
+  const newQuery = {};
+
+  for (let [key, val] of Object.entries(query))
+    if (key.startsWith("$")) newQuery[key] = transposeQuery(val);
+    else if (key === "DeviceID.ID") newQuery["_id"] = val;
+
+  return newQuery;
+}
+
+exports.transpose = transpose;
+exports.transposeQuery = transposeQuery;