diff --git a/api/controllers/common/human_input_v2_contracts.py b/api/controllers/common/human_input_v2_contracts.py
index b098adfb66d574..b3cbf70037a9d2 100644
--- a/api/controllers/common/human_input_v2_contracts.py
+++ b/api/controllers/common/human_input_v2_contracts.py
@@ -167,6 +167,9 @@ class ContactOption(ResponseModel):
     name: str = Field(description="Display name shown in the contact picker.")
     avatar_url: str | None = Field(default=None, description="Signed avatar URL if one is available.")
     email: str | None = Field(default=None, description="Current deliverable Email, when available.")
+    im_providers: list[IMProvider] = Field(
+        description="Distinct providers of effective IM bindings in the current workspace; not a delivery health check."
+    )
 
 
 class ExternalContactCreateResponse(ResponseModel):
diff --git a/api/controllers/console/human_input_v2/contact.py b/api/controllers/console/human_input_v2/contact.py
index 9f06e9aa3f9450..bcf96ac1b67555 100644
--- a/api/controllers/console/human_input_v2/contact.py
+++ b/api/controllers/console/human_input_v2/contact.py
@@ -356,13 +356,15 @@ def _contact_payload(view: ContactWithIMBindings) -> dict[str, object]:
     }
 
 
-def _contact_option_payload(contact: Contact) -> dict[str, object]:
+def _contact_option_payload(view: ContactWithIMBindings) -> dict[str, object]:
+    contact = view.contact
     return {
         "id": contact.id,
         "type": contact.type,
         "name": contact.name,
         "avatar_url": _contact_avatar_url(contact) or None,
         "email": contact.email,
+        "im_providers": list(dict.fromkeys(binding.provider for binding in view.im_bindings)),
     }
 
 
@@ -469,7 +471,8 @@ class WorkspaceContactOptionsApi(Resource):
         params=query_params_from_model(ContactOptionsQuery),
         description=(
             "List editor-safe Contact options for static recipient selection. "
-            "The projection omits IM bindings and management metadata; unavailable Contacts are omitted."
+            "The projection includes effective IM providers and omits binding details and management metadata; "
+            "unavailable Contacts are omitted."
         ),
     )
     @console_ns.response(200, "Success", console_ns.models[ListContactOptionsResponse.__name__])
@@ -920,6 +923,7 @@ class BatchGetContactOptionsAPI(Resource):
         params=query_params_from_model(BatchGetContactOptionsQuery),
         description=(
             "Resolve Contact IDs persisted in workflow recipient configuration. "
+            "Include effective IM providers for each Contact. "
             "Contacts unavailable in the current workspace are omitted."
         ),
     )
diff --git a/api/openapi/markdown/console-openapi.md b/api/openapi/markdown/console-openapi.md
index f27dcd00daf26c..51fbf07472a6e2 100644
--- a/api/openapi/markdown/console-openapi.md
+++ b/api/openapi/markdown/console-openapi.md
@@ -14928,7 +14928,7 @@ Update a plugin endpoint
 | default | Error | **application/json**: [ErrorResponse](#errorresponse)<br> |
 
 ### [GET] /workspaces/current/human-input/v2/contact-options
-List editor-safe Contact options for static recipient selection. The projection omits IM bindings and management metadata; unavailable Contacts are omitted.
+List editor-safe Contact options for static recipient selection. The projection includes effective IM providers and omits binding details and management metadata; unavailable Contacts are omitted.
 
 #### Parameters
 
@@ -14946,7 +14946,7 @@ List editor-safe Contact options for static recipient selection. The projection
 | default | Error | **application/json**: [ErrorResponse](#errorresponse)<br> |
 
 ### [GET] /workspaces/current/human-input/v2/contact-options/batch
-Resolve Contact IDs persisted in workflow recipient configuration. Contacts unavailable in the current workspace are omitted.
+Resolve Contact IDs persisted in workflow recipient configuration. Include effective IM providers for each Contact. Contacts unavailable in the current workspace are omitted.
 
 #### Parameters
 
@@ -23641,6 +23641,7 @@ Least-privilege contact projection returned to workflow editors.
 | avatar_url | string | Signed avatar URL if one is available. | No |
 | email | string | Current deliverable Email, when available. | No |
 | id | string | Unique contact identifier persisted in workflow recipient configuration. | Yes |
+| im_providers | [ [IMProvider](#improvider) ] | Distinct providers of effective IM bindings in the current workspace; not a delivery health check. | Yes |
 | name | string | Display name shown in the contact picker. | Yes |
 | type | [HumanInputContactType](#humaninputcontacttype) | Resolved contact type in the current workspace scope. | Yes |
 
diff --git a/api/services/human_input_v2/contact_service.py b/api/services/human_input_v2/contact_service.py
index 5a2f84b81bee2d..3d92ae8407dd89 100644
--- a/api/services/human_input_v2/contact_service.py
+++ b/api/services/human_input_v2/contact_service.py
@@ -106,20 +106,21 @@ def list_contact_options(
         page: int,
         limit: int,
         keyword: str,
-    ) -> Page[Contact]:
-        return self._contacts.list_contact(
+    ) -> Page[ContactWithIMBindings]:
+        contact_page = self._contacts.list_contact(
             tenant_id,
             page,
             limit,
             ContactQuery(keyword=keyword),
         )
+        return Page(self._with_bindings(tenant_id, contact_page.items), contact_page.page, contact_page.limit)
 
     def get_contact_options(
         self,
         tenant_id: TenantId,
         contact_ids: Sequence[ContactId],
-    ) -> Sequence[Contact]:
-        return self._contacts.get_contacts_by_ids(tenant_id, contact_ids)
+    ) -> tuple[ContactWithIMBindings, ...]:
+        return self._with_bindings(tenant_id, self._contacts.get_contacts_by_ids(tenant_id, contact_ids))
 
     def create_external_contact(
         self,
diff --git a/api/tests/unit_tests/controllers/console/human_input_v2/test_contact.py b/api/tests/unit_tests/controllers/console/human_input_v2/test_contact.py
index 604ad9bfbc2436..4be06966e5037c 100644
--- a/api/tests/unit_tests/controllers/console/human_input_v2/test_contact.py
+++ b/api/tests/unit_tests/controllers/console/human_input_v2/test_contact.py
@@ -143,7 +143,14 @@ def test_editing_roles_can_select_contacts(
     options = client.get(f"{_BASE_URL}/contact-options")
     assert options.status_code == 200
     assert options.get_json()["data"] == [
-        {"id": contact_id, "type": "external", "name": "Reviewer", "email": "contact@example.com", "avatar_url": None}
+        {
+            "id": contact_id,
+            "type": "external",
+            "name": "Reviewer",
+            "email": "contact@example.com",
+            "avatar_url": None,
+            "im_providers": [],
+        }
     ]
 
     resolved = client.get(f"{_BASE_URL}/contact-options/batch", query_string={"contact_ids": contact_id})
diff --git a/api/tests/unit_tests/controllers/console/workspace/test_im_contact_sync_api.py b/api/tests/unit_tests/controllers/console/workspace/test_im_contact_sync_api.py
index 65d4e38d4052fc..3d60c4c6c796ac 100644
--- a/api/tests/unit_tests/controllers/console/workspace/test_im_contact_sync_api.py
+++ b/api/tests/unit_tests/controllers/console/workspace/test_im_contact_sync_api.py
@@ -766,20 +766,22 @@ def list_contact_options(
         page: int,
         limit: int,
         keyword: str,
-    ) -> Page[Contact]:
+    ) -> Page[ContactWithIMBindings]:
         assert tenant_id == TenantId("workspace-1")
         assert (page, limit, keyword) == (1, 20, "")
-        return Page((self.view.contact,), page, limit)
+        return Page((self.view,), page, limit)
 
     def get_contacts(self, tenant_id: TenantId, contact_ids: list[ContactId]) -> tuple[ContactWithIMBindings, ...]:
         assert tenant_id == TenantId("workspace-1")
         assert contact_ids == [self.view.contact.id]
         return (self.view,)
 
-    def get_contact_options(self, tenant_id: TenantId, contact_ids: list[ContactId]) -> tuple[Contact, ...]:
+    def get_contact_options(
+        self, tenant_id: TenantId, contact_ids: list[ContactId]
+    ) -> tuple[ContactWithIMBindings, ...]:
         assert tenant_id == TenantId("workspace-1")
         assert contact_ids == [self.view.contact.id]
-        return (self.view.contact,)
+        return (self.view,)
 
 
 def test_contact_read_handlers_preserve_current_and_editor_safe_projections(
@@ -818,10 +820,37 @@ def test_contact_read_handlers_preserve_current_and_editor_safe_projections(
     assert options["data"][0]["id"] == contact_id
     assert batch["data"][0]["id"] == contact_id
     assert batch_options["data"][0]["id"] == contact_id
+    assert options["data"][0]["im_providers"] == ["feishu"]
+    assert batch_options["data"] == options["data"]
     assert "im_bindings" not in options["data"][0]
     assert "email" not in batch["data"][0]
 
 
+@pytest.mark.parametrize("provider", list(IMProvider))
+def test_contact_options_return_distinct_effective_im_providers(
+    app: Flask, monkeypatch: pytest.MonkeyPatch, provider: IMProvider
+) -> None:
+    service = _ContactService()
+    binding = replace(service.view.im_bindings[0], provider=provider)
+    service.view = replace(service.view, im_bindings=(binding, binding))
+    monkeypatch.setattr(_CONTROLLER_MODULE, "_contact_service", lambda _session, _tenant_id: service)
+
+    with app.test_request_context(method="GET"):
+        options = unwrap(WorkspaceContactOptionsApi.get)(WorkspaceContactOptionsApi(), object(), "workspace-1")
+    with app.test_request_context(method="GET", query_string=[("contact_ids", str(service.view.contact.id))]):
+        batch = unwrap(BatchGetContactOptionsAPI.get)(BatchGetContactOptionsAPI(), object(), "workspace-1")
+
+    assert options["data"] == batch["data"]
+    assert options["data"][0] == {
+        "id": str(service.view.contact.id),
+        "type": "workspace",
+        "name": "Reviewer",
+        "avatar_url": None,
+        "email": "reviewer@example.com",
+        "im_providers": [provider.value],
+    }
+
+
 @pytest.mark.parametrize("scope", [IMBindingScope.WORKSPACE, None])
 def test_contact_detail_returns_workspace_binding_or_empty_details(
     app: Flask, monkeypatch: pytest.MonkeyPatch, scope: IMBindingScope | None
diff --git a/api/tests/unit_tests/services/human_input_v2/test_contact_capability_boundaries.py b/api/tests/unit_tests/services/human_input_v2/test_contact_capability_boundaries.py
index 778d6b30e64af6..538b256bb2708e 100644
--- a/api/tests/unit_tests/services/human_input_v2/test_contact_capability_boundaries.py
+++ b/api/tests/unit_tests/services/human_input_v2/test_contact_capability_boundaries.py
@@ -187,9 +187,10 @@ def test_tenant_scoped_core_service_needs_only_contact_and_binding_read_ports()
     assert tuple(item.contact for item in contacts_with_bindings) == (contact,)
     assert selected is not None
     assert selected.contact == contact
-    assert tuple(options) == (contact,)
+    assert tuple(option.contact for option in options) == (contact,)
+    assert all(not option.im_bindings for option in options)
     assert contact_port.tenant_calls == [_TENANT_ID, _TENANT_ID, _TENANT_ID]
-    assert binding_port.calls == [(_TENANT_ID, (contact.id,)), (_TENANT_ID, (contact.id,))]
+    assert binding_port.calls == [(_TENANT_ID, (contact.id,)), (_TENANT_ID, (contact.id,)), (_TENANT_ID, (contact.id,))]
 
 
 def test_candidate_id_round_trips_unchanged_through_the_enterprise_service_port() -> None:
diff --git a/api/tests/unit_tests/services/human_input_v2/test_contact_service.py b/api/tests/unit_tests/services/human_input_v2/test_contact_service.py
new file mode 100644
index 00000000000000..9606e32b2feb30
--- /dev/null
+++ b/api/tests/unit_tests/services/human_input_v2/test_contact_service.py
@@ -0,0 +1,50 @@
+"""Contact option queries include the current effective IM bindings."""
+
+from datetime import datetime
+from unittest.mock import create_autospec
+
+from core.human_input_v2.entities import IMBindingScope, IMProvider
+from core.human_input_v2.shared import ContactId, IMBindingId, IMIdentityId, TenantId
+from repositories.human_input_v2.contact import (
+    Contact,
+    ContactIMBindingRepository,
+    ContactRepository,
+    ContactType,
+    IMBinding,
+    Page,
+)
+from services.human_input_v2.contact_service import ContactManagementService
+
+
+def test_contact_options_include_effective_bindings_for_listed_and_resolved_contacts() -> None:
+    tenant_id = TenantId("workspace-1")
+    contact = Contact(
+        id=ContactId("contact-1"),
+        type=ContactType.WORKSPACE,
+        name="Reviewer",
+        email="reviewer@example.com",
+        avatar_file_id=None,
+        created_at=datetime(2026, 11, 1),
+    )
+    binding = IMBinding(
+        id=IMBindingId("binding-1"),
+        scope=IMBindingScope.WORKSPACE,
+        contact_id=contact.id,
+        identity_id=IMIdentityId("identity-1"),
+        provider=IMProvider.FEISHU,
+    )
+    contacts = create_autospec(ContactRepository, instance=True)
+    contacts.list_contact.return_value = Page((contact,), page=2, limit=10)
+    contacts.get_contacts_by_ids.return_value = (contact,)
+    bindings = create_autospec(ContactIMBindingRepository, instance=True)
+    bindings.get_im_bindings.return_value = (binding,)
+    service = ContactManagementService(contacts, bindings, None)
+
+    page = service.list_contact_options(tenant_id, page=2, limit=10, keyword="reviewer")
+    resolved = service.get_contact_options(tenant_id, (contact.id,))
+
+    assert (page.page, page.limit) == (2, 10)
+    assert len(page.items) == 1
+    assert page.items[0].contact == contact
+    assert page.items[0].im_bindings == (binding,)
+    assert resolved == page.items
diff --git a/packages/contracts/generated/api/console/workspaces/orpc.gen.ts b/packages/contracts/generated/api/console/workspaces/orpc.gen.ts
index 7b02b27bf37a24..af91c5ea9faee4 100644
--- a/packages/contracts/generated/api/console/workspaces/orpc.gen.ts
+++ b/packages/contracts/generated/api/console/workspaces/orpc.gen.ts
@@ -1474,12 +1474,12 @@ export const channels = {
 }
 
 /**
- * Resolve Contact IDs persisted in workflow recipient configuration. Contacts unavailable in the current workspace are omitted.
+ * Resolve Contact IDs persisted in workflow recipient configuration. Include effective IM providers for each Contact. Contacts unavailable in the current workspace are omitted.
  */
 export const get16 = oc
   .route({
     description:
-      'Resolve Contact IDs persisted in workflow recipient configuration. Contacts unavailable in the current workspace are omitted.',
+      'Resolve Contact IDs persisted in workflow recipient configuration. Include effective IM providers for each Contact. Contacts unavailable in the current workspace are omitted.',
     inputStructure: 'detailed',
     method: 'GET',
     operationId: 'getWorkspacesCurrentHumanInputV2ContactOptionsBatch',
@@ -1494,12 +1494,12 @@ export const batch = {
 }
 
 /**
- * List editor-safe Contact options for static recipient selection. The projection omits IM bindings and management metadata; unavailable Contacts are omitted.
+ * List editor-safe Contact options for static recipient selection. The projection includes effective IM providers and omits binding details and management metadata; unavailable Contacts are omitted.
  */
 export const get17 = oc
   .route({
     description:
-      'List editor-safe Contact options for static recipient selection. The projection omits IM bindings and management metadata; unavailable Contacts are omitted.',
+      'List editor-safe Contact options for static recipient selection. The projection includes effective IM providers and omits binding details and management metadata; unavailable Contacts are omitted.',
     inputStructure: 'detailed',
     method: 'GET',
     operationId: 'getWorkspacesCurrentHumanInputV2ContactOptions',
diff --git a/packages/contracts/generated/api/console/workspaces/types.gen.ts b/packages/contracts/generated/api/console/workspaces/types.gen.ts
index 792a2f9d2a3d98..338045b3a9fe78 100644
--- a/packages/contracts/generated/api/console/workspaces/types.gen.ts
+++ b/packages/contracts/generated/api/console/workspaces/types.gen.ts
@@ -1916,6 +1916,7 @@ export type ContactOption = {
   avatar_url?: string | null
   email?: string | null
   id: string
+  im_providers: Array<ImProvider>
   name: string
   type: HumanInputContactType
 }
diff --git a/packages/contracts/generated/api/console/workspaces/zod.gen.ts b/packages/contracts/generated/api/console/workspaces/zod.gen.ts
index 627fb4f003491b..651986b0612bf9 100644
--- a/packages/contracts/generated/api/console/workspaces/zod.gen.ts
+++ b/packages/contracts/generated/api/console/workspaces/zod.gen.ts
@@ -2946,6 +2946,7 @@ export const zContactOption = z.object({
   avatar_url: z.string().nullish(),
   email: z.string().nullish(),
   id: z.string(),
+  im_providers: z.array(zImProvider),
   name: z.string(),
   type: zHumanInputContactType,
 })
diff --git a/web/app/components/workflow/nodes/human-input-v2/__tests__/contact-provider.spec.ts b/web/app/components/workflow/nodes/human-input-v2/__tests__/contact-provider.spec.ts
index 7f6819e9042312..a1232f2f4be13f 100644
--- a/web/app/components/workflow/nodes/human-input-v2/__tests__/contact-provider.spec.ts
+++ b/web/app/components/workflow/nodes/human-input-v2/__tests__/contact-provider.spec.ts
@@ -34,7 +34,14 @@ vi.mock('@/service/console', async () => {
 
 const firstPage: ListContactOptionsResponse = {
   data: [
-    { id: 'contact-1', name: 'First contact', email: null, avatar_url: null, type: 'platform' },
+    {
+      id: 'contact-1',
+      name: 'First contact',
+      email: null,
+      avatar_url: null,
+      type: 'platform',
+      im_providers: [],
+    },
   ],
   page: 1,
   limit: 20,
@@ -50,7 +57,13 @@ describe('Contact recipient API provider', () => {
     api.search.mockResolvedValueOnce(firstPage).mockResolvedValueOnce({
       ...firstPage,
       data: [
-        { id: 'contact-21', name: 'Last contact', email: 'last@example.com', type: 'external' },
+        {
+          id: 'contact-21',
+          name: 'Last contact',
+          email: 'last@example.com',
+          type: 'external',
+          im_providers: [],
+        },
       ],
       page: 2,
     })