diff --git a/src/composables/auth/useCurrentUser.ts b/src/composables/auth/useCurrentUser.ts
index 3999aa9c1..cf89c1069 100644
--- a/src/composables/auth/useCurrentUser.ts
+++ b/src/composables/auth/useCurrentUser.ts
@@ -1,3 +1,4 @@
+import { whenever } from '@vueuse/core'
 import { computed } from 'vue'
 
 import { useFirebaseAuthActions } from '@/composables/auth/useFirebaseAuthActions'
@@ -6,6 +7,7 @@ import { useDialogService } from '@/services/dialogService'
 import { useApiKeyAuthStore } from '@/stores/apiKeyAuthStore'
 import { useCommandStore } from '@/stores/commandStore'
 import { useFirebaseAuthStore } from '@/stores/firebaseAuthStore'
+import type { AuthUserInfo } from '@/types/authTypes'
 
 export const useCurrentUser = () => {
   const authStore = useFirebaseAuthStore()
@@ -20,6 +22,27 @@ export const useCurrentUser = () => {
     () => !!isApiKeyLogin.value || firebaseUser.value !== null
   )
 
+  const resolvedUserInfo = computed<AuthUserInfo | null>(() => {
+    if (isApiKeyLogin.value && apiKeyStore.currentUser) {
+      return { id: apiKeyStore.currentUser.id }
+    }
+
+    if (firebaseUser.value) {
+      return { id: firebaseUser.value.uid }
+    }
+
+    return null
+  })
+
+  const onUserResolved = (callback: (user: AuthUserInfo) => void) => {
+    if (resolvedUserInfo.value) {
+      callback(resolvedUserInfo.value)
+    }
+
+    const stop = whenever(resolvedUserInfo, callback)
+    return () => stop()
+  }
+
   const userDisplayName = computed(() => {
     if (isApiKeyLogin.value) {
       return apiKeyStore.currentUser?.name
@@ -112,8 +135,10 @@ export const useCurrentUser = () => {
     userPhotoUrl,
     providerName,
     providerIcon,
+    resolvedUserInfo,
     handleSignOut,
     handleSignIn,
-    handleDeleteAccount
+    handleDeleteAccount,
+    onUserResolved
   }
 }
diff --git a/src/services/extensionService.ts b/src/services/extensionService.ts
index 457f566b9..26b67fba7 100644
--- a/src/services/extensionService.ts
+++ b/src/services/extensionService.ts
@@ -1,3 +1,4 @@
+import { useCurrentUser } from '@/composables/auth/useCurrentUser'
 import { useErrorHandling } from '@/composables/useErrorHandling'
 import { useSettingStore } from '@/platform/settings/settingStore'
 import { api } from '@/scripts/api'
@@ -72,6 +73,13 @@ export const useExtensionService = () => {
         }
       })()
     }
+
+    if (extension.onAuthUserResolved) {
+      const { onUserResolved } = useCurrentUser()
+      onUserResolved((user) => {
+        void extension.onAuthUserResolved?.(user, app)
+      })
+    }
   }
 
   /**
diff --git a/src/types/authTypes.ts b/src/types/authTypes.ts
index 07bb43dd6..5f3891bd5 100644
--- a/src/types/authTypes.ts
+++ b/src/types/authTypes.ts
@@ -7,3 +7,7 @@ export type ApiKeyAuthHeader = {
 }
 
 export type AuthHeader = LoggedInAuthHeader | ApiKeyAuthHeader
+
+export interface AuthUserInfo {
+  id: string
+}
diff --git a/src/types/comfy.ts b/src/types/comfy.ts
index 8cfb8fa61..53ce42ce8 100644
--- a/src/types/comfy.ts
+++ b/src/types/comfy.ts
@@ -7,6 +7,7 @@ import type { ComfyNodeDef } from '@/schemas/nodeDefSchema'
 import type { ComfyApp } from '@/scripts/app'
 import type { ComfyWidgetConstructor } from '@/scripts/widgets'
 import type { ComfyCommand } from '@/stores/commandStore'
+import type { AuthUserInfo } from '@/types/authTypes'
 import type { BottomPanelExtension } from '@/types/extensionTypes'
 
 type Widgets = Record<string, ComfyWidgetConstructor>
@@ -166,5 +167,12 @@ export interface ComfyExtension {
     missingNodeTypes: MissingNodeType[]
   ): Promise<void> | void
 
+  /**
+   * Fired whenever authentication resolves, providing the anonymized user id..
+   * Extensions can register at any time and will receive the latest value immediately.
+   * This is an experimental API and may be changed or removed in the future.
+   */
+  onAuthUserResolved?(user: AuthUserInfo, app: ComfyApp): Promise<void> | void
+
   [key: string]: any
 }