diff --git a/api/controllers/openapi/__init__.py b/api/controllers/openapi/__init__.py
index 63b30846e1..baa481785d 100644
--- a/api/controllers/openapi/__init__.py
+++ b/api/controllers/openapi/__init__.py
@@ -20,6 +20,7 @@ from . import (
     account,
     app_info,
     apps,
+    apps_permitted,
     chat_messages,
     completion_messages,
     index,
@@ -33,6 +34,7 @@ __all__ = [
     "account",
     "app_info",
     "apps",
+    "apps_permitted",
     "chat_messages",
     "completion_messages",
     "index",
diff --git a/api/controllers/openapi/_models.py b/api/controllers/openapi/_models.py
index ee361531e9..8ff218b536 100644
--- a/api/controllers/openapi/_models.py
+++ b/api/controllers/openapi/_models.py
@@ -45,6 +45,8 @@ class AppListRow(BaseModel):
     tags: list[dict[str, str]] = []
     updated_at: str | None = None
     created_by_name: str | None = None
+    workspace_id: str | None = None
+    workspace_name: str | None = None
 
 
 class AppInfoResponse(BaseModel):
diff --git a/api/controllers/openapi/apps.py b/api/controllers/openapi/apps.py
index 6396d162fe..6e7167db6b 100644
--- a/api/controllers/openapi/apps.py
+++ b/api/controllers/openapi/apps.py
@@ -41,7 +41,7 @@ from libs.oauth_bearer import (
     require_workspace_member,
     validate_bearer,
 )
-from models import App
+from models import App, Tenant
 from models.model import AppMode, Tag, TagBinding
 
 # Shared decorator stack for `apps:read`-scoped endpoints. List order is
@@ -185,6 +185,8 @@ class AppListApi(Resource):
         workspace_id = query.workspace_id
         require_workspace_member(ctx, workspace_id)
 
+        tenant_name = db.session.execute(sa.select(Tenant.name).where(Tenant.id == workspace_id)).scalar_one_or_none()
+
         page = query.page
         limit = query.limit
         mode = query.mode.value if query.mode else None
@@ -228,6 +230,8 @@ class AppListApi(Resource):
                 tags=[{"name": t.name} for t in r.tags],
                 updated_at=r.updated_at.isoformat() if r.updated_at else None,
                 created_by_name=getattr(r, "author_name", None),
+                workspace_id=str(workspace_id),
+                workspace_name=tenant_name,
             )
             for r in rows
         ]
diff --git a/api/controllers/openapi/apps_permitted.py b/api/controllers/openapi/apps_permitted.py
new file mode 100644
index 0000000000..74fa1147b7
--- /dev/null
+++ b/api/controllers/openapi/apps_permitted.py
@@ -0,0 +1,109 @@
+"""GET /openapi/v1/apps/permitted — external-subject app discovery (EE only)."""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from flask import g, request
+from flask_restx import Resource
+from pydantic import BaseModel, ConfigDict, Field, ValidationError
+from werkzeug.exceptions import UnprocessableEntity
+
+from controllers.openapi import openapi_ns
+from controllers.openapi._models import (
+    MAX_PAGE_LIMIT,
+    AppListRow,
+    PaginationEnvelope,
+)
+from extensions.ext_database import db
+from libs.device_flow_security import enterprise_only
+from libs.oauth_bearer import (
+    ACCEPT_USER_EXT_SSO,
+    Scope,
+    require_scope,
+    validate_bearer,
+)
+from models import App, Tenant
+from models.model import AppMode
+from services.enterprise.app_permitted_service import list_permitted_apps
+
+
+class AppPermittedListQuery(BaseModel):
+    """Query-param validator for `GET /openapi/v1/apps/permitted`.
+
+    Strict — `extra='forbid'` rejects `workspace_id`, `tag`, and any other
+    param not explicitly allowed for this surface. Returns 422 on violation.
+    """
+
+    model_config = ConfigDict(extra="forbid")
+
+    page: int = Field(1, ge=1)
+    limit: int = Field(20, ge=1, le=MAX_PAGE_LIMIT)
+    mode: AppMode | None = None
+    name: str | None = Field(None, max_length=200)
+
+
+@openapi_ns.route("/apps/permitted")
+class AppListPermittedApi(Resource):
+    method_decorators = [
+        require_scope(Scope.APPS_READ_PERMITTED),
+        validate_bearer(accept=ACCEPT_USER_EXT_SSO),
+        enterprise_only,
+    ]
+
+    def get(self):
+        try:
+            query = AppPermittedListQuery.model_validate(request.args.to_dict(flat=True))
+        except ValidationError as exc:
+            raise UnprocessableEntity(exc.json())
+
+        ctx = g.auth_ctx
+        page_result = list_permitted_apps(
+            subject_email=ctx.subject_email or "",
+            subject_issuer=ctx.subject_issuer or "",
+            page=query.page,
+            limit=query.limit,
+            mode=query.mode.value if query.mode else None,
+            name=query.name,
+        )
+
+        if not page_result.data:
+            env = PaginationEnvelope[AppListRow].build(
+                page=query.page, limit=query.limit, total=page_result.total, items=[]
+            )
+            return env.model_dump(mode="json"), 200
+
+        app_ids = [r.app_id for r in page_result.data]
+        apps_by_id = {
+            str(a.id): a for a in db.session.execute(sa.select(App).where(App.id.in_(app_ids))).scalars().all()
+        }
+        tenant_ids = list({a.tenant_id for a in apps_by_id.values()})
+        tenants_by_id = {
+            str(t.id): t for t in db.session.execute(sa.select(Tenant).where(Tenant.id.in_(tenant_ids))).scalars().all()
+        }
+
+        items: list[AppListRow] = []
+        for r in page_result.data:
+            app = apps_by_id.get(r.app_id)
+            if not app or app.status != "normal":
+                # Allow-list referenced an app that no longer exists or was archived;
+                # filter it out rather than emit a partial row.
+                continue
+            tenant = tenants_by_id.get(str(app.tenant_id))
+            items.append(
+                AppListRow(
+                    id=str(app.id),
+                    name=app.name,
+                    description=app.description,
+                    mode=app.mode,
+                    tags=[],  # tags are tenant-scoped; not surfaced cross-tenant
+                    updated_at=app.updated_at.isoformat() if app.updated_at else None,
+                    created_by_name=None,  # cross-tenant author leak prevention
+                    workspace_id=str(app.tenant_id),
+                    workspace_name=tenant.name if tenant else None,
+                )
+            )
+
+        env = PaginationEnvelope[AppListRow].build(
+            page=query.page, limit=query.limit, total=page_result.total, items=items
+        )
+        return env.model_dump(mode="json"), 200
diff --git a/api/libs/oauth_bearer.py b/api/libs/oauth_bearer.py
index 24e7028b2a..ecea39ea12 100644
--- a/api/libs/oauth_bearer.py
+++ b/api/libs/oauth_bearer.py
@@ -47,11 +47,12 @@ class Scope(StrEnum):
 
     `FULL` is the catch-all carried by `dfoa_` account tokens — it satisfies
     any per-route `require_scope`. `dfoe_` tokens carry the per-feature scopes
-    (`APPS_RUN` today).
+    (`APPS_RUN`, `APPS_READ_PERMITTED`).
     """
 
     FULL = "full"
     APPS_READ = "apps:read"
+    APPS_READ_PERMITTED = "apps:read:permitted"
     APPS_RUN = "apps:run"
 
 
@@ -63,6 +64,7 @@ class Accepts(StrEnum):
 
 
 ACCEPT_USER_ANY: frozenset[Accepts] = frozenset({Accepts.USER_ACCOUNT, Accepts.USER_EXT_SSO})
+ACCEPT_USER_EXT_SSO: frozenset[Accepts] = frozenset({Accepts.USER_EXT_SSO})
 
 _SUBJECT_TO_ACCEPT: dict[SubjectType, Accepts] = {
     SubjectType.ACCOUNT: Accepts.USER_ACCOUNT,
@@ -591,7 +593,7 @@ def build_registry(session_factory, redis_client) -> TokenKindRegistry:
             TokenKind(
                 prefix="dfoe_",
                 subject_type=SubjectType.EXTERNAL_SSO,
-                scopes=frozenset({Scope.APPS_RUN}),
+                scopes=frozenset({Scope.APPS_RUN, Scope.APPS_READ_PERMITTED}),
                 source="oauth_external_sso",
                 resolver=oauth.for_external_sso(),
             ),
diff --git a/api/services/enterprise/app_permitted_service.py b/api/services/enterprise/app_permitted_service.py
new file mode 100644
index 0000000000..d3bc1ad371
--- /dev/null
+++ b/api/services/enterprise/app_permitted_service.py
@@ -0,0 +1,44 @@
+"""Enterprise inner-API client for the /apps/permitted route.
+
+Wraps `POST /inner/api/webapp/permitted-apps` (defined in ee-2). Until
+ee-2 ships the endpoint, every call surfaces 503 from the dify-api side.
+This isolates the wire-up so the route + scope + query model can ship
+ahead of the cross-repo dependency.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from werkzeug.exceptions import ServiceUnavailable
+
+
+@dataclass(frozen=True, slots=True)
+class PermittedAppRow:
+    app_id: str
+    tenant_id: str
+
+
+@dataclass(frozen=True, slots=True)
+class PermittedAppsPage:
+    data: list[PermittedAppRow]
+    total: int
+    has_more: bool
+
+
+def list_permitted_apps(
+    *,
+    subject_email: str,
+    subject_issuer: str,
+    page: int,
+    limit: int,
+    mode: str | None = None,
+    name: str | None = None,
+) -> PermittedAppsPage:
+    """Cross-tenant allow-list query for `dfoe_` discovery.
+
+    TODO(ee-2): wire to `POST /inner/api/webapp/permitted-apps`. Until then
+    every call returns 503 to keep CLI-side work unblocked behind a stable
+    server contract.
+    """
+    raise ServiceUnavailable("permitted_apps_unavailable")
diff --git a/api/tests/unit_tests/controllers/openapi/test_apps_permitted_query.py b/api/tests/unit_tests/controllers/openapi/test_apps_permitted_query.py
new file mode 100644
index 0000000000..9c6306d284
--- /dev/null
+++ b/api/tests/unit_tests/controllers/openapi/test_apps_permitted_query.py
@@ -0,0 +1,44 @@
+"""Unit tests for AppPermittedListQuery — the /apps/permitted query validator.
+
+Strict ConfigDict(extra='forbid'): cross-tenant tag/workspace_id are
+unresolvable, so the model must reject them as 422 instead of silently
+dropping them. Mode/name/page/limit have the same shape as AppListQuery.
+"""
+
+from __future__ import annotations
+
+import pytest
+from pydantic import ValidationError
+
+from controllers.openapi.apps_permitted import AppPermittedListQuery
+
+
+def test_query_defaults_match_apps_list():
+    q = AppPermittedListQuery.model_validate({})
+    assert q.page == 1
+    assert q.limit == 20
+    assert q.mode is None
+    assert q.name is None
+
+
+def test_query_rejects_workspace_id():
+    """workspace_id is meaningless for /permitted (cross-tenant); rejecting it
+    forces CLI authors to drop the param rather than send it silently."""
+    with pytest.raises(ValidationError):
+        AppPermittedListQuery.model_validate({"workspace_id": "ws-1"})
+
+
+def test_query_rejects_tag():
+    """Tags are tenant-scoped; cross-tenant tag resolution is undefined."""
+    with pytest.raises(ValidationError):
+        AppPermittedListQuery.model_validate({"tag": "prod"})
+
+
+def test_query_validates_mode_against_app_mode():
+    with pytest.raises(ValidationError):
+        AppPermittedListQuery.model_validate({"mode": "not-a-mode"})
+
+
+def test_query_clamps_limit_at_max():
+    with pytest.raises(ValidationError):
+        AppPermittedListQuery.model_validate({"limit": 500})
diff --git a/api/tests/unit_tests/libs/test_oauth_bearer.py b/api/tests/unit_tests/libs/test_oauth_bearer.py
new file mode 100644
index 0000000000..da93c88fc8
--- /dev/null
+++ b/api/tests/unit_tests/libs/test_oauth_bearer.py
@@ -0,0 +1,19 @@
+"""Unit tests for the openapi bearer-scope catalog and TokenKind registry."""
+
+from __future__ import annotations
+
+from unittest.mock import MagicMock
+
+
+def test_apps_read_permitted_scope_present():
+    from libs.oauth_bearer import Scope
+
+    assert Scope.APPS_READ_PERMITTED.value == "apps:read:permitted"
+
+
+def test_dfoe_token_kind_carries_apps_read_permitted():
+    from libs.oauth_bearer import Scope, build_registry
+
+    registry = build_registry(MagicMock(), MagicMock())
+    dfoe = next(k for k in registry.kinds() if k.prefix == "dfoe_")
+    assert Scope.APPS_READ_PERMITTED in dfoe.scopes