diff --git a/neode-ui/src/views/appSession/appSessionConfig.ts b/neode-ui/src/views/appSession/appSessionConfig.ts
index 6929150a..675996c3 100644
--- a/neode-ui/src/views/appSession/appSessionConfig.ts
+++ b/neode-ui/src/views/appSession/appSessionConfig.ts
@@ -34,6 +34,9 @@ export const APP_PORTS: Record<string, number> = {
   'bitcoin-knots': 8334,
   'bitcoin-core':  8334,
   'bitcoin-ui':    8334,
+  'cuprate':       18091,
+  'cuprate-ui':    18091,
+  'archy-cuprate-ui': 18091,
   'electrumx':     50002,
   'electrs':       50002,
   'archy-electrs-ui': 50002,
@@ -153,6 +156,15 @@ export function resolveAppUrl(id: string, routeQueryPath?: string, runtimeUrl?:
     return appOrigin(8334, id)
   }
 
+  // Cuprate UI is the same companion shape on :18091. The cuprate app itself
+  // publishes only the restricted RPC (18090) — a raw JSON endpoint, not a
+  // page — so cuprate launches must land on the companion, never on the
+  // runtimeUrl a running cuprate reports.
+  if (id === 'cuprate' || id === 'cuprate-ui' || id === 'archy-cuprate-ui') {
+    if (import.meta.env.DEV) return '/app/cuprate-ui/'
+    return appOrigin(18091, id)
+  }
+
   if (runtimeUrl && id !== 'netbird') {
     let base = runtimeUrl.replace(/localhost/i, window.location.hostname)
     // The backend reports runtime URLs as http:// because that is how the app
diff --git a/neode-ui/src/views/appSession/generatedAppSessionConfig.ts b/neode-ui/src/views/appSession/generatedAppSessionConfig.ts
index 590bb7a0..7051f1b4 100644
--- a/neode-ui/src/views/appSession/generatedAppSessionConfig.ts
+++ b/neode-ui/src/views/appSession/generatedAppSessionConfig.ts
@@ -9,6 +9,7 @@ export const GENERATED_APP_PORTS: Record<string, number> = {
   "bitcoin-ui": 8334,
   "botfights": 9100,
   "btcpay-server": 23000,
+  "cuprate-ui": 18091,
   "electrs-ui": 50002,
   "electrumx": 50002,
   "fedimint": 8175,
@@ -54,6 +55,7 @@ export const GENERATED_APP_TITLES: Record<string, string> = {
   "btcpay-server": "BTCPay Server",
   "core-lightning": "Core Lightning (CLN)",
   "cuprate": "Cuprate",
+  "cuprate-ui": "Cuprate UI",
   "electrs-ui": "Electrs UI",
   "electrumx": "ElectrumX",
   "fedimint": "Fedimint Guardian",
diff --git a/neode-ui/src/views/discover/curatedApps.ts b/neode-ui/src/views/discover/curatedApps.ts
index a1aa650e..88ba0885 100644
--- a/neode-ui/src/views/discover/curatedApps.ts
+++ b/neode-ui/src/views/discover/curatedApps.ts
@@ -123,6 +123,8 @@ const CATALOG_APP_ID_ALIASES: Record<string, string> = {
   'archy-lnd-ui': 'lnd-ui',
   'bitcoin-knots': 'bitcoin-ui',
   'bitcoin-core': 'bitcoin-ui',
+  'cuprate': 'cuprate-ui',
+  'archy-cuprate-ui': 'cuprate-ui',
   'fedimintd': 'fedimint',
   'immich_server': 'immich',
 }
diff --git a/neode-ui/vite.config.ts b/neode-ui/vite.config.ts
index cacae92d..33864499 100644
--- a/neode-ui/vite.config.ts
+++ b/neode-ui/vite.config.ts
@@ -173,6 +173,11 @@ export default defineConfig({
         changeOrigin: true,
         secure: false,
       },
+      '/app/cuprate-ui': {
+        target: process.env.BACKEND_URL || 'http://localhost:5959',
+        changeOrigin: true,
+        secure: false,
+      },
       // Demo mock app UIs (electrumx, lnd, fedimint) + generic notice page.
       '/app/electrumx': { target: process.env.BACKEND_URL || 'http://localhost:5959', changeOrigin: true, secure: false },
       '/app/electrs': { target: process.env.BACKEND_URL || 'http://localhost:5959', changeOrigin: true, secure: false },