diff --git a/.gitignore b/.gitignore
index f25efcb..2e1814b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,4 +25,5 @@ test/
 
 node_modules/
 
-agent.md
\ No newline at end of file
+agent.md
+api-backend.md
\ No newline at end of file
diff --git a/src/views/Instances.vue b/src/views/Instances.vue
index 8cc8755..e12fd63 100644
--- a/src/views/Instances.vue
+++ b/src/views/Instances.vue
@@ -54,6 +54,109 @@
         <div v-if="filteredInstances.length === 0" class="empty-state">
             <p>No instances available</p>
         </div>
+
+        <div v-if="showAddModal" class="modal-overlay" @click="closeAddModal">
+            <div class="modal" @click.stop>
+                <h3>Add Instance</h3>
+                <form @submit.prevent="handleAddInstance" class="form">
+                    <div class="form-group">
+                        <label>Instance Name</label>
+                        <input 
+                            type="text" 
+                            v-model="formData.name" 
+                            required
+                        >
+                    </div>
+                    <div class="form-group">
+                        <label>Authentication Method</label>
+                        <select v-model="formData.auth_method" required>
+                            <option value="token">Token</option>
+                            <option value="oidc">OIDC</option>
+                        </select>
+                    </div>
+                    <div class="form-group">
+                        <label>Server Address</label>
+                        <input 
+                            type="text" 
+                            v-model="formData.serverAddr" 
+                            required
+                        >
+                    </div>
+                    <div class="form-group">
+                        <label>Server Port</label>
+                        <input 
+                            type="text" 
+                            v-model="formData.serverPort" 
+                            required
+                        >
+                    </div>
+                    <div class="form-group" v-if="formData.auth_method === 'token'">
+                        <label>Token</label>
+                        <input 
+                            type="text" 
+                            v-model="formData.token"
+                            required
+                        >
+                    </div>
+                    <div v-if="formData.auth_method === 'oidc'">
+                        <div class="form-group">
+                            <label>Client ID</label>
+                            <input 
+                                type="text" 
+                                v-model="formData.clientId"
+                                required
+                            >
+                        </div>
+                        <div class="form-group">
+                            <label>Client Secret</label>
+                            <input 
+                                type="text" 
+                                v-model="formData.clientSecret"
+                                required
+                            >
+                        </div>
+                        <div class="form-group">
+                            <label>Audience</label>
+                            <input 
+                                type="text" 
+                                v-model="formData.audience"
+                                required
+                            >
+                        </div>
+                        <div class="form-group">
+                            <label>Token Endpoint URL</label>
+                            <input 
+                                type="url" 
+                                v-model="formData.tokenEndpoint"
+                                required
+                            >
+                        </div>
+                    </div>
+                    <div class="form-group checkbox-group">
+                        <input 
+                            type="checkbox" 
+                            id="bootAtStart" 
+                            v-model="formData.bootAtStart"
+                        >
+                        <label for="bootAtStart">Boot at Start</label>
+                    </div>
+                    <div class="form-group">
+                        <label>Run User</label>
+                        <input 
+                            type="text" 
+                            v-model="formData.runUser"
+                            placeholder="Default: root"
+                        >
+                    </div>
+                    <div class="form-actions">
+                        <button type="button" class="cancel-btn" @click="closeAddModal">Cancel</button>
+                        <button type="submit" class="submit-btn" :disabled="loading">
+                            {{ loading ? 'Processing...' : 'Submit' }}
+                        </button>
+                    </div>
+                </form>
+            </div>
+        </div>
     </div>
 </template>
 
@@ -74,6 +177,21 @@ export default {
     setup(props) {
         const router = useRouter();
         const instances = ref([]);
+        const showAddModal = ref(false);
+        const loading = ref(false);
+        const formData = ref({
+            name: '',
+            auth_method: 'token',
+            serverAddr: '',
+            serverPort: '',
+            token: '',
+            clientId: '',
+            clientSecret: '',
+            audience: '',
+            tokenEndpoint: '',
+            bootAtStart: false,
+            runUser: ''
+        });
 
         const filteredInstances = computed(() => {
             if (!props.searchQuery) return instances.value;
@@ -118,6 +236,60 @@ export default {
             router.push(`/instances/${instanceName}`);
         };
 
+        const handleAddInstance = async () => {
+            loading.value = true;
+            try {
+                const instanceInfo = {
+                    name: formData.value.name,
+                    serverAddr: formData.value.serverAddr,
+                    serverPort: formData.value.serverPort,
+                    auth_method: formData.value.auth_method
+                };
+                
+                const additionalProperties = {};
+                if (formData.value.auth_method === 'token') {
+                    additionalProperties.auth_token = formData.value.token;
+                } else if (formData.value.auth_method === 'oidc') {
+                    additionalProperties.oidc_client_id = formData.value.clientId;
+                    additionalProperties.oidc_client_secret = formData.value.clientSecret;
+                    additionalProperties.oidc_audience = formData.value.audience;
+                    additionalProperties.oidc_token_endpoint = formData.value.tokenEndpoint;
+                }
+
+                await instanceApi.createInstance(
+                    instanceInfo,
+                    formData.value.bootAtStart,
+                    formData.value.runUser || 'root',
+                    additionalProperties
+                );
+                
+                showNotification('Instance created successfully', 'success');
+                closeAddModal();
+                await loadInstances();
+            } catch (error) {
+                showNotification(error.message || 'Failed to create instance', 'error');
+            } finally {
+                loading.value = false;
+            }
+        };
+
+        const closeAddModal = () => {
+            showAddModal.value = false;
+            formData.value = {
+                name: '',
+                auth_method: 'token',
+                serverAddr: '',
+                serverPort: '',
+                token: '',
+                clientId: '',
+                clientSecret: '',
+                audience: '',
+                tokenEndpoint: '',
+                bootAtStart: false,
+                runUser: ''
+            };
+        };
+
         onMounted(() => {
             loadInstances();
         });
@@ -129,7 +301,12 @@ export default {
             stopInstance,
             goToDetail,
             formatDate,
-            highlightText
+            highlightText,
+            showAddModal,
+            loading,
+            formData,
+            handleAddInstance,
+            closeAddModal
         };
     }
 };
@@ -138,6 +315,12 @@ export default {
 <style scoped>
 @import '../styles/common.css';
 
+.page-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
 .instances-page {
     padding: 24px;
 }
@@ -151,6 +334,9 @@ export default {
 .instance-card {
     cursor: pointer;
     transition: all 0.3s;
+    background-color: var(--card-bg);
+    padding: 16px;
+    border-radius: 8px;
 }
 
 .instance-card:hover {
@@ -158,6 +344,12 @@ export default {
     box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
 }
 
+.card-footer {
+    display: flex;
+    gap: 8px;
+    margin-top: 16px;
+}
+
 .instance-name {
     font-size: 18px;
     font-weight: 600;
@@ -165,4 +357,110 @@ export default {
     margin: 0;
     transition: color 0.3s;
 }
+
+.modal-overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(0, 0, 0, 0.5);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 1000;
+}
+
+.modal {
+    background: var(--card-bg);
+    border-radius: 8px;
+    padding: 24px;
+    width: 90%;
+    max-width: 500px;
+    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
+}
+
+.modal h3 {
+    margin-top: 0;
+    margin-bottom: 20px;
+    color: var(--text-color);
+}
+
+.form {
+    display: flex;
+    flex-direction: column;
+    gap: 16px;
+}
+
+.form-group {
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+.form-group label {
+    font-size: 14px;
+    font-weight: 500;
+    color: var(--text-color);
+}
+
+.form-group input,
+.form-group select {
+    padding: 10px;
+    border: 1px solid var(--border-color);
+    border-radius: 4px;
+    font-size: 14px;
+    background: var(--input-bg);
+    color: var(--text-color);
+}
+
+.form-group.checkbox-group {
+    flex-direction: row;
+    align-items: center;
+    gap: 8px;
+}
+
+.form-group.checkbox-group input {
+    width: auto;
+}
+
+.form-actions {
+    display: flex;
+    justify-content: flex-end;
+    gap: 12px;
+    margin-top: 8px;
+}
+
+.cancel-btn {
+    padding: 10px 20px;
+    border: 1px solid var(--border-color);
+    border-radius: 4px;
+    background: transparent;
+    color: var(--text-color);
+    cursor: pointer;
+    transition: all 0.3s;
+}
+
+.cancel-btn:hover {
+    background: var(--hover-bg);
+}
+
+.submit-btn {
+    padding: 10px 20px;
+    border: none;
+    border-radius: 4px;
+    background: var(--primary-color);
+    color: white;
+    cursor: pointer;
+    transition: all 0.3s;
+}
+
+.submit-btn:hover {
+    background: var(--primary-hover);
+}
+
+.submit-btn:disabled {
+    background: var(--disabled-bg);
+    cursor: not-allowed;
+}
 </style>
diff --git a/src/views/Sessions.vue b/src/views/Sessions.vue
index fe86f79..a6c6ef2 100644
--- a/src/views/Sessions.vue
+++ b/src/views/Sessions.vue
@@ -97,6 +97,9 @@ export default {
 
 .session-card {
     transition: background-color 0.3s;
+    background-color: var(--card-bg);
+    padding: 16px;
+    border-radius: 8px;
 }
 
 .session-icon {
diff --git a/src/views/Users.vue b/src/views/Users.vue
index 5a48ee1..c92c10f 100644
--- a/src/views/Users.vue
+++ b/src/views/Users.vue
@@ -3,7 +3,7 @@
         <div class="page-header">
             <h2>User Management</h2>
             <button class="add-btn" @click="showAddModal = true">
-                + Add User
+                <i class="fas fa-plus" aria-hidden="true"></i> Add User
             </button>
         </div>
         <div class="users-list">