diff --git a/src/App.css b/src/App.css
index ee5f81a..df74672 100644
--- a/src/App.css
+++ b/src/App.css
@@ -199,4 +199,97 @@ th {
 .badge.removed {
   color: #6b7280;
   background: #f3f4f6;
+}
+
+.error-banner {
+  background: #fee2e2;
+  color: #991b1b;
+  padding: 12px 16px;
+  border-radius: 12px;
+  margin-bottom: 18px;
+  font-weight: 700;
+}
+
+.modal-backdrop {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.45);
+  display: grid;
+  place-items: center;
+  z-index: 50;
+}
+
+.modal {
+  width: 520px;
+  background: white;
+  border-radius: 20px;
+  padding: 24px;
+  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.25);
+}
+
+.modal-header {
+  display: flex;
+  justify-content: space-between;
+  gap: 16px;
+  margin-bottom: 22px;
+}
+
+.modal-header h2 {
+  margin: 0;
+}
+
+.modal-header p {
+  margin: 4px 0 0;
+  color: #6b7280;
+}
+
+.icon-button {
+  border: 0;
+  background: #f3f4f6;
+  border-radius: 10px;
+  width: 36px;
+  height: 36px;
+  display: grid;
+  place-items: center;
+  cursor: pointer;
+}
+
+.router-form {
+  display: grid;
+  gap: 16px;
+}
+
+.router-form label {
+  display: grid;
+  gap: 7px;
+  font-size: 14px;
+  font-weight: 700;
+}
+
+.router-form input {
+  height: 42px;
+  border: 1px solid #d1d5db;
+  border-radius: 10px;
+  padding: 0 12px;
+  font: inherit;
+}
+
+.modal-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 12px;
+  margin-top: 8px;
+}
+
+.secondary {
+  border: 0;
+  border-radius: 12px;
+  padding: 12px 18px;
+  background: #f3f4f6;
+  cursor: pointer;
+}
+
+.primary:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
 }
\ No newline at end of file
diff --git a/src/App.tsx b/src/App.tsx
index 046b726..46b509d 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,5 +1,5 @@
-import { useEffect, useState } from "react";
-import { apiGet } from "./api";
+import { FormEvent, useEffect, useState } from "react";
+import { apiGet, apiPost } from "./api";
 import {
   LayoutDashboard,
   Router,
@@ -7,6 +7,7 @@ import {
   Activity,
   Server,
   Settings,
+  X,
 } from "lucide-react";
 import "./App.css";
 
@@ -19,19 +20,66 @@ type RouterItem = {
   status: string;
 };
 
+type CreateRouterRequest = {
+  name: string;
+  serialNumber: string;
+  lanIp: string;
+  lanSubnet: string;
+};
 
 function App() {
   const [page, setPage] = useState("dashboard");
   const [routers, setRouters] = useState<RouterItem[]>([]);
   const [loading, setLoading] = useState(false);
+  const [createOpen, setCreateOpen] = useState(false);
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const [form, setForm] = useState<CreateRouterRequest>({
+    name: "",
+    serialNumber: "",
+    lanIp: "",
+    lanSubnet: "",
+  });
 
   async function loadRouters() {
-    setLoading(true);
+    try {
+      setLoading(true);
+      setError(null);
 
-    const data = await apiGet<RouterItem[]>("/api/routers");
+      const data = await apiGet<RouterItem[]>("/api/routers");
+      setRouters(data);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to load routers");
+    } finally {
+      setLoading(false);
+    }
+  }
 
-    setRouters(data);
-    setLoading(false);
+  async function createRouter(event: FormEvent) {
+    event.preventDefault();
+
+    try {
+      setSaving(true);
+      setError(null);
+
+      await apiPost<RouterItem, CreateRouterRequest>("/api/routers", form);
+
+      setCreateOpen(false);
+      setForm({
+        name: "",
+        serialNumber: "",
+        lanIp: "",
+        lanSubnet: "",
+      });
+
+      await loadRouters();
+      setPage("routers");
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to create router");
+    } finally {
+      setSaving(false);
+    }
   }
 
   useEffect(() => {
@@ -77,6 +125,8 @@ function App() {
       </aside>
 
       <main className="content">
+        {error && <div className="error-banner">{error}</div>}
+
         {page === "dashboard" && (
           <>
             <div className="page-header">
@@ -103,7 +153,9 @@ function App() {
                 <h1>Routers</h1>
                 <p>Manage routers and OpenVPN provisioning</p>
               </div>
-              <button className="primary">+ New Router</button>
+              <button className="primary" onClick={() => setCreateOpen(true)}>
+                + New Router
+              </button>
             </div>
 
             <div className="panel">
@@ -143,6 +195,72 @@ function App() {
           </>
         )}
       </main>
+
+      {createOpen && (
+        <div className="modal-backdrop">
+          <div className="modal">
+            <div className="modal-header">
+              <div>
+                <h2>New Router</h2>
+                <p>Create a router before allocating VPN details.</p>
+              </div>
+              <button className="icon-button" onClick={() => setCreateOpen(false)}>
+                <X size={18} />
+              </button>
+            </div>
+
+            <form onSubmit={createRouter} className="router-form">
+              <label>
+                Router Name
+                <input
+                  required
+                  value={form.name}
+                  onChange={(e) => setForm({ ...form, name: e.target.value })}
+                  placeholder="Ex: Loja Braga"
+                />
+              </label>
+
+              <label>
+                Serial Number
+                <input
+                  value={form.serialNumber}
+                  onChange={(e) => setForm({ ...form, serialNumber: e.target.value })}
+                  placeholder="Ex: LR-001"
+                />
+              </label>
+
+              <label>
+                LAN IP
+                <input
+                  required
+                  value={form.lanIp}
+                  onChange={(e) => setForm({ ...form, lanIp: e.target.value })}
+                  placeholder="Ex: 192.168.60.1"
+                />
+              </label>
+
+              <label>
+                LAN Subnet
+                <input
+                  required
+                  value={form.lanSubnet}
+                  onChange={(e) => setForm({ ...form, lanSubnet: e.target.value })}
+                  placeholder="Ex: 192.168.60.0/24"
+                />
+              </label>
+
+              <div className="modal-actions">
+                <button type="button" className="secondary" onClick={() => setCreateOpen(false)}>
+                  Cancel
+                </button>
+                <button type="submit" className="primary" disabled={saving}>
+                  {saving ? "Saving..." : "Save Router"}
+                </button>
+              </div>
+            </form>
+          </div>
+        </div>
+      )}
     </div>
   );
 }
diff --git a/src/api.ts b/src/api.ts
index e0b54b8..cc1ceba 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -2,6 +2,9 @@ const API_BASE = import.meta.env.VITE_API_BASE;
 const API_KEY = import.meta.env.VITE_API_KEY;
 
 export async function apiGet<T>(path: string): Promise<T> {
+  console.log("API_BASE:", API_BASE);
+  console.log("Calling:", `${API_BASE}${path}`);
+
   const response = await fetch(`${API_BASE}${path}`, {
     headers: {
       "X-API-Key": API_KEY,
@@ -12,5 +15,26 @@ export async function apiGet<T>(path: string): Promise<T> {
     throw new Error(`API error ${response.status}`);
   }
 
+  return response.json();
+}
+
+export async function apiPost<TResponse, TBody>(
+  path: string,
+  body: TBody
+): Promise<TResponse> {
+  const response = await fetch(`${API_BASE}${path}`, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+      "X-API-Key": API_KEY,
+    },
+    body: JSON.stringify(body),
+  });
+
+  if (!response.ok) {
+    const error = await response.json().catch(() => null);
+    throw new Error(error?.error || `API error ${response.status}`);
+  }
+
   return response.json();
 }
\ No newline at end of file