diff --git a/ui/src/api/queries/commands.ts b/ui/src/api/queries/commands.ts
index dc5d2eb9..cefa610f 100644
--- a/ui/src/api/queries/commands.ts
+++ b/ui/src/api/queries/commands.ts
@@ -31,6 +31,9 @@ export interface ApplicationConfig {
   tapVersion: number
   routeRecording: Record<string, boolean>
   compressSuccess: boolean
+  sensitiveKeys?: string[]
+  globalSensitiveKeys?: string[]
+  mergedSensitiveKeys?: string[]
 }
 
 /** Authenticated fetch using the JWT from auth store. Paths are relative to apiBaseUrl. */
@@ -58,8 +61,13 @@ export function useApplicationConfig(application: string | undefined) {
     queryKey: ['applicationConfig', application],
     queryFn: async () => {
       const res = await authFetch(`/config/${application}`)
-      if (!res.ok) throw new Error('Failed to fetch config')
-      return res.json() as Promise<ApplicationConfig>
+      if (!res.ok) throw new Error(`Failed to fetch config: ${res.status}`)
+      const data = await res.json()
+      // Server returns AppConfigResponse: { config, globalSensitiveKeys, mergedSensitiveKeys }
+      const cfg = data.config ?? data
+      cfg.globalSensitiveKeys = data.globalSensitiveKeys ?? null
+      cfg.mergedSensitiveKeys = data.mergedSensitiveKeys ?? null
+      return cfg as ApplicationConfig
     },
     enabled: !!application,
   })
diff --git a/ui/src/pages/Admin/AppConfigDetailPage.module.css b/ui/src/pages/Admin/AppConfigDetailPage.module.css
index b5a2bde9..01e550fd 100644
--- a/ui/src/pages/Admin/AppConfigDetailPage.module.css
+++ b/ui/src/pages/Admin/AppConfigDetailPage.module.css
@@ -100,3 +100,23 @@
   color: var(--text-primary);
   margin-bottom: 16px;
 }
+
+.sensitiveKeysRow {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-xs);
+}
+
+.pillList {
+  display: flex;
+  flex-wrap: wrap;
+  gap: var(--space-xs);
+  min-height: 28px;
+  align-items: center;
+}
+
+.sensitiveKeyInput {
+  display: flex;
+  gap: var(--space-sm);
+  max-width: 400px;
+}
diff --git a/ui/src/pages/Admin/AppConfigDetailPage.tsx b/ui/src/pages/Admin/AppConfigDetailPage.tsx
index b6c814a1..d552c6c9 100644
--- a/ui/src/pages/Admin/AppConfigDetailPage.tsx
+++ b/ui/src/pages/Admin/AppConfigDetailPage.tsx
@@ -2,7 +2,7 @@ import { useEffect, useState, useMemo } from 'react';
 import { useParams, useNavigate } from 'react-router';
 import { ArrowLeft, Pencil, X } from 'lucide-react';
 import {
-  Button, SectionHeader, MonoText, Badge, DataTable, Spinner, Toggle, Select, Label, useToast,
+  Button, SectionHeader, MonoText, Badge, DataTable, Spinner, Toggle, Select, Label, Tag, useToast,
 } from '@cameleer/design-system';
 import type { Column } from '@cameleer/design-system';
 import { useApplicationConfig, useUpdateApplicationConfig } from '../../api/queries/commands';
@@ -85,6 +85,8 @@ export default function AppConfigDetailPage() {
   const [form, setForm] = useState<Partial<ApplicationConfig> | null>(null);
   const [tracedDraft, setTracedDraft] = useState<Record<string, string>>({});
   const [routeRecordingDraft, setRouteRecordingDraft] = useState<Record<string, boolean>>({});
+  const [sensitiveKeysDraft, setSensitiveKeysDraft] = useState<string[]>([]);
+  const [sensitiveKeyInput, setSensitiveKeyInput] = useState('');
 
   // Find routes for this application from the catalog
   const appRoutes: CatalogRoute[] = useMemo(() => {
@@ -106,6 +108,7 @@ export default function AppConfigDetailPage() {
       });
       setTracedDraft({ ...config.tracedProcessors });
       setRouteRecordingDraft({ ...config.routeRecording });
+      setSensitiveKeysDraft([...(config.sensitiveKeys ?? [])]);
     }
   }, [config]);
 
@@ -122,6 +125,7 @@ export default function AppConfigDetailPage() {
     });
     setTracedDraft({ ...config.tracedProcessors });
     setRouteRecordingDraft({ ...config.routeRecording });
+    setSensitiveKeysDraft([...(config.sensitiveKeys ?? [])]);
     setEditing(true);
   }
 
@@ -148,6 +152,7 @@ export default function AppConfigDetailPage() {
       ...form,
       tracedProcessors: tracedDraft,
       routeRecording: routeRecordingDraft,
+      sensitiveKeys: sensitiveKeysDraft.length > 0 ? sensitiveKeysDraft : undefined,
     } as ApplicationConfig;
     updateConfig.mutate({ config: updated, environment: selectedEnv }, {
       onSuccess: (saved: ConfigUpdateResponse) => {
@@ -468,6 +473,76 @@ export default function AppConfigDetailPage() {
           </span>
         )}
       </div>
+
+      {/* ── Sensitive Keys ──────────────────────────────────────────────────── */}
+      <div className={sectionStyles.section}>
+        <SectionHeader>Sensitive Keys</SectionHeader>
+        {config.globalSensitiveKeys && config.globalSensitiveKeys.length > 0 ? (
+          <span className={styles.sectionSummary}>
+            {config.globalSensitiveKeys.length} global (enforced) &middot; {(editing ? sensitiveKeysDraft : config.sensitiveKeys ?? []).length} app-specific
+          </span>
+        ) : (
+          <span className={styles.sectionSummary}>
+            No global sensitive keys configured. Agents use their built-in defaults.
+          </span>
+        )}
+
+        {/* Global keys — read-only pills */}
+        {config.globalSensitiveKeys && config.globalSensitiveKeys.length > 0 && (
+          <div className={styles.sensitiveKeysRow}>
+            <Label>Global (enforced)</Label>
+            <div className={styles.pillList}>
+              {config.globalSensitiveKeys.map((key) => (
+                <Badge key={key} label={key} color="auto" variant="filled" />
+              ))}
+            </div>
+          </div>
+        )}
+
+        {/* Per-app keys — editable */}
+        <div className={styles.sensitiveKeysRow}>
+          <Label>Application-specific</Label>
+          <div className={styles.pillList}>
+            {(editing ? sensitiveKeysDraft : config.sensitiveKeys ?? []).map((key, i) => (
+              editing ? (
+                <Tag key={`${key}-${i}`} label={key} onRemove={() => setSensitiveKeysDraft((prev) => prev.filter((_, idx) => idx !== i))} />
+              ) : (
+                <Badge key={key} label={key} color="primary" variant="filled" />
+              )
+            ))}
+            {(editing ? sensitiveKeysDraft : config.sensitiveKeys ?? []).length === 0 && (
+              <span className={styles.hint}>None</span>
+            )}
+          </div>
+          {editing && (
+            <div className={styles.sensitiveKeyInput}>
+              <input
+                className={styles.numberInput}
+                style={{ flex: 1 }}
+                value={sensitiveKeyInput}
+                onChange={(e) => setSensitiveKeyInput(e.target.value)}
+                onKeyDown={(e) => {
+                  if (e.key === 'Enter') {
+                    e.preventDefault();
+                    const trimmed = sensitiveKeyInput.trim();
+                    if (trimmed && !sensitiveKeysDraft.some((k) => k.toLowerCase() === trimmed.toLowerCase())) {
+                      setSensitiveKeysDraft((prev) => [...prev, trimmed]);
+                      setSensitiveKeyInput('');
+                    }
+                  }
+                }}
+                placeholder="Add key or glob pattern"
+              />
+            </div>
+          )}
+        </div>
+
+        {config.globalSensitiveKeys && config.globalSensitiveKeys.length > 0 && (
+          <span className={styles.hint}>
+            Global keys are enforced by your administrator and cannot be removed per-app.
+          </span>
+        )}
+      </div>
     </div>
   );
 }