diff --git a/src/sentry/api/urls.py b/src/sentry/api/urls.py
index b4c2c8944b3954..638b9a47d9bf2f 100644
--- a/src/sentry/api/urls.py
+++ b/src/sentry/api/urls.py
@@ -554,6 +554,7 @@
 from sentry.seer.endpoints.organization_seer_workflows import OrganizationSeerWorkflowsEndpoint
 from sentry.seer.endpoints.project_seer_night_shift import ProjectSeerNightShiftEndpoint
 from sentry.seer.endpoints.project_seer_preferences import ProjectSeerPreferencesEndpoint
+from sentry.seer.endpoints.project_seer_settings import ProjectSeerSettingsEndpoint
 from sentry.seer.endpoints.search_agent_start import SearchAgentStartEndpoint
 from sentry.seer.endpoints.search_agent_state import SearchAgentStateEndpoint
 from sentry.seer.endpoints.seer_rpc import SeerRpcServiceEndpoint
@@ -3372,6 +3373,11 @@ def create_group_urls(name_prefix: str) -> list[URLPattern | URLResolver]:
         name="sentry-api-0-project-tempest-credentials-details",
     ),
     # Seer
+    re_path(
+        r"^(?P<organization_id_or_slug>[^/]+)/(?P<project_id_or_slug>[^/]+)/seer/settings/$",
+        ProjectSeerSettingsEndpoint.as_view(),
+        name="sentry-api-0-project-seer-settings",
+    ),
     re_path(
         r"^(?P<organization_id_or_slug>[^/]+)/(?P<project_id_or_slug>[^/]+)/seer/preferences/$",
         ProjectSeerPreferencesEndpoint.as_view(),
diff --git a/src/sentry/projectoptions/defaults.py b/src/sentry/projectoptions/defaults.py
index a5c0cd0cfce0b4..637634d96b4c71 100644
--- a/src/sentry/projectoptions/defaults.py
+++ b/src/sentry/projectoptions/defaults.py
@@ -208,6 +208,7 @@
     "sentry:seer_automation_handoff_integration_id",
     "sentry:seer_automation_handoff_auto_create_pr",
     "sentry:autofix_automation_tuning",
+    "sentry:seer_scanner_automation",
 ]
 
 # Boolean to enable/disable preprod size analysis for this project.
diff --git a/src/sentry/seer/endpoints/project_seer_settings.py b/src/sentry/seer/endpoints/project_seer_settings.py
new file mode 100644
index 00000000000000..a499a57cfdd4cb
--- /dev/null
+++ b/src/sentry/seer/endpoints/project_seer_settings.py
@@ -0,0 +1,160 @@
+from __future__ import annotations
+
+from typing import TypedDict
+
+from rest_framework import serializers
+from rest_framework.request import Request
+from rest_framework.response import Response
+
+from sentry import audit_log
+from sentry.api.api_owners import ApiOwner
+from sentry.api.api_publish_status import ApiPublishStatus
+from sentry.api.base import cell_silo_endpoint
+from sentry.api.bases.project import ProjectEndpoint, ProjectEventPermission
+from sentry.constants import ObjectStatus
+from sentry.integrations.services.integration import integration_service
+from sentry.models.project import Project
+from sentry.seer.autofix.constants import AutofixAutomationTuningSettings
+from sentry.seer.autofix.utils import (
+    AutofixStoppingPoint,
+    AutomationCodingAgent,
+    build_automation_handoff,
+    get_valid_automated_run_stopping_points,
+    update_seer_project_settings,
+)
+from sentry.seer.models.project_repository import SeerProjectRepository
+from sentry.seer.models.seer_api_models import SeerAutomationHandoffConfiguration
+
+
+class SeerProjectSettings(TypedDict):
+    automation_tuning: str
+    handoff: SeerAutomationHandoffConfiguration | None
+    repos_count: int
+    scanner_automation: bool
+    stopping_point: str
+
+
+class SeerProjectSettingsResponse(TypedDict):
+    projectId: str
+    projectSlug: str
+    agent: str
+    integrationId: str | None
+    stoppingPoint: str
+    scannerAutomation: bool
+    reposCount: int
+
+
+def _get_project_settings(project: Project) -> SeerProjectSettings:
+    return SeerProjectSettings(
+        automation_tuning=project.get_option("sentry:autofix_automation_tuning"),
+        scanner_automation=project.get_option("sentry:seer_scanner_automation"),
+        stopping_point=project.get_option("sentry:seer_automated_run_stopping_point"),
+        handoff=build_automation_handoff(project.get_option),
+        repos_count=SeerProjectRepository.objects.filter(
+            project=project, repository__status=ObjectStatus.ACTIVE
+        ).count(),
+    )
+
+
+def _serialize(project: Project, settings: SeerProjectSettings) -> SeerProjectSettingsResponse:
+    # Automation tuning is a high-level toggle (OFF / LOW / MEDIUM / HIGH) that
+    # controls whether Seer runs automatically at all. When it's OFF, report
+    # stopping point as "off" regardless of the stored value so the UI reports
+    # disabled automation instead of an active stopping point.
+    stopping_point = (
+        "off"
+        if settings["automation_tuning"] == AutofixAutomationTuningSettings.OFF
+        else settings["stopping_point"]
+    )
+
+    handoff = settings["handoff"]
+    if handoff is None:
+        # No configured external handoff means use Seer agent.
+        agent: str = "seer"
+        integration_id: str | None = None
+    else:
+        agent = handoff.target
+        integration_id = str(handoff.integration_id)
+
+    return SeerProjectSettingsResponse(
+        projectId=str(project.id),
+        projectSlug=project.slug,
+        agent=agent,
+        integrationId=integration_id,
+        stoppingPoint=stopping_point,
+        scannerAutomation=settings["scanner_automation"],
+        reposCount=settings["repos_count"],
+    )
+
+
+def serialize_project(project: Project) -> SeerProjectSettingsResponse:
+    return _serialize(project, _get_project_settings(project))
+
+
+class ProjectSettingsUpdateSerializer(serializers.Serializer):
+    agent = serializers.ChoiceField(choices=[*AutomationCodingAgent], required=False)
+    integrationId = serializers.IntegerField(required=False)
+    stoppingPoint = serializers.ChoiceField(choices=["off", *AutofixStoppingPoint], required=False)
+    scannerAutomation = serializers.BooleanField(required=False)
+
+    def validate_stoppingPoint(self, value: str) -> str:
+        if value == "off":
+            return value
+
+        organization = self.context["organization"]
+        if value not in get_valid_automated_run_stopping_points(organization):
+            raise serializers.ValidationError(f'"{value}" is not a valid choice.')
+        return value
+
+    def validate_integrationId(self, value: int) -> int:
+        organization = self.context["organization"]
+        org_integrations = integration_service.get_organization_integrations(
+            organization_id=organization.id, integration_id=value
+        )
+        if not org_integrations:
+            raise serializers.ValidationError(f"{value} is not a valid integration.")
+        return value
+
+    def validate(self, data):
+        if "agent" in data and data["agent"] != "seer" and "integrationId" not in data:
+            raise serializers.ValidationError(
+                {"integrationId": "Required when agent is an external coding agent."}
+            )
+
+        has_update = any(k in data for k in ("agent", "stoppingPoint", "scannerAutomation"))
+        if not has_update:
+            raise serializers.ValidationError("At least one update field must be provided.")
+
+        return data
+
+
+@cell_silo_endpoint
+class ProjectSeerSettingsEndpoint(ProjectEndpoint):
+    owner = ApiOwner.ML_AI
+    publish_status = {
+        "GET": ApiPublishStatus.EXPERIMENTAL,
+        "PUT": ApiPublishStatus.EXPERIMENTAL,
+    }
+    permission_classes = (ProjectEventPermission,)
+
+    def get(self, request: Request, project: Project) -> Response:
+        return Response(serialize_project(project))
+
+    def put(self, request: Request, project: Project) -> Response:
+        serializer = ProjectSettingsUpdateSerializer(
+            data=request.data, context={"organization": project.organization}
+        )
+        if not serializer.is_valid():
+            return Response(serializer.errors, status=400)
+
+        update_seer_project_settings(project, serializer.validated_data)
+
+        self.create_audit_entry(
+            request=request,
+            organization=project.organization,
+            target_object=project.id,
+            event=audit_log.get_event_id("AUTOFIX_SETTINGS_EDIT"),
+            data={"project_id": project.id},
+        )
+
+        return Response(serialize_project(project))
diff --git a/static/app/utils/api/knownSentryApiUrls.generated.ts b/static/app/utils/api/knownSentryApiUrls.generated.ts
index 9158d3bc68fd84..7d437f26e1fa71 100644
--- a/static/app/utils/api/knownSentryApiUrls.generated.ts
+++ b/static/app/utils/api/knownSentryApiUrls.generated.ts
@@ -723,6 +723,7 @@ export type KnownSentryApiUrls =
   | '/projects/$organizationIdOrSlug/$projectIdOrSlug/rules/preview/'
   | '/projects/$organizationIdOrSlug/$projectIdOrSlug/seer/night-shift/'
   | '/projects/$organizationIdOrSlug/$projectIdOrSlug/seer/preferences/'
+  | '/projects/$organizationIdOrSlug/$projectIdOrSlug/seer/settings/'
   | '/projects/$organizationIdOrSlug/$projectIdOrSlug/stacktrace-coverage/'
   | '/projects/$organizationIdOrSlug/$projectIdOrSlug/stacktrace-link/'
   | '/projects/$organizationIdOrSlug/$projectIdOrSlug/stacktrace-source-context/'
diff --git a/tests/sentry/seer/endpoints/test_project_seer_settings.py b/tests/sentry/seer/endpoints/test_project_seer_settings.py
new file mode 100644
index 00000000000000..135d00443c19ac
--- /dev/null
+++ b/tests/sentry/seer/endpoints/test_project_seer_settings.py
@@ -0,0 +1,195 @@
+from django.urls import reverse
+
+from sentry.constants import ObjectStatus
+from sentry.seer.autofix.constants import AutofixAutomationTuningSettings
+from sentry.seer.models import AutofixHandoffPoint
+from sentry.seer.models.project_repository import SeerProjectRepository
+from sentry.testutils.cases import APITestCase
+
+
+class ProjectSeerSettingsEndpointTest(APITestCase):
+    endpoint = "sentry-api-0-project-seer-settings"
+
+    def setUp(self) -> None:
+        super().setUp()
+        self.login_as(user=self.user)
+        self.project = self.create_project(organization=self.organization)
+        self.url = reverse(
+            self.endpoint,
+            kwargs={
+                "organization_id_or_slug": self.organization.slug,
+                "project_id_or_slug": self.project.slug,
+            },
+        )
+
+    def test_get_returns_defaults(self) -> None:
+        """A project with no options set should return defaults."""
+        response = self.client.get(self.url)
+
+        assert response.status_code == 200
+        assert response.data == {
+            "projectId": str(self.project.id),
+            "projectSlug": self.project.slug,
+            "agent": "seer",
+            "integrationId": None,
+            "stoppingPoint": "off",
+            "scannerAutomation": True,
+            "reposCount": 0,
+        }
+
+    def test_get_returns_configured_project_options(self) -> None:
+        """A project with explicit options should reflect them in the response."""
+        self.project.update_option(
+            "sentry:autofix_automation_tuning", AutofixAutomationTuningSettings.MEDIUM
+        )
+        self.project.update_option("sentry:seer_automated_run_stopping_point", "open_pr")
+        self.project.update_option("sentry:seer_scanner_automation", False)
+
+        response = self.client.get(self.url)
+
+        assert response.status_code == 200
+        assert response.data["stoppingPoint"] == "open_pr"
+        assert response.data["scannerAutomation"] is False
+
+    def test_get_returns_external_agent_with_integration_id(self) -> None:
+        """A project with an external handoff should return the agent alias and integration ID."""
+        self.project.update_option(
+            "sentry:seer_automation_handoff_target", "cursor_background_agent"
+        )
+        self.project.update_option(
+            "sentry:seer_automation_handoff_point", AutofixHandoffPoint.ROOT_CAUSE
+        )
+        self.project.update_option("sentry:seer_automation_handoff_integration_id", 42)
+
+        response = self.client.get(self.url)
+
+        assert response.status_code == 200
+        assert response.data["agent"] == "cursor_background_agent"
+        assert response.data["integrationId"] == "42"
+
+    def test_get_stopping_point_off_when_tuning_off(self) -> None:
+        """stoppingPoint should be 'off' when tuning is OFF."""
+        self.project.update_option(
+            "sentry:autofix_automation_tuning", AutofixAutomationTuningSettings.OFF
+        )
+        self.project.update_option("sentry:seer_automated_run_stopping_point", "open_pr")
+
+        response = self.client.get(self.url)
+
+        assert response.status_code == 200
+        assert response.data["stoppingPoint"] == "off"
+
+    def test_get_stopping_point_when_tuning_on(self) -> None:
+        """When tuning is not OFF, stoppingPoint should reflect the stored value."""
+        self.project.update_option(
+            "sentry:autofix_automation_tuning", AutofixAutomationTuningSettings.MEDIUM
+        )
+        self.project.update_option("sentry:seer_automated_run_stopping_point", "root_cause")
+
+        response = self.client.get(self.url)
+
+        assert response.status_code == 200
+        assert response.data["stoppingPoint"] == "root_cause"
+
+    def test_get_repos_count(self) -> None:
+        """reposCount should reflect active SeerProjectRepository rows."""
+        repo1 = self.create_repo(project=self.project, name="owner/repo-1")
+        repo2 = self.create_repo(project=self.project, name="owner/repo-2")
+        SeerProjectRepository.objects.create(project=self.project, repository=repo1)
+        SeerProjectRepository.objects.create(project=self.project, repository=repo2)
+
+        response = self.client.get(self.url)
+
+        assert response.status_code == 200
+        assert response.data["reposCount"] == 2
+
+    def test_get_repos_count_excludes_inactive_repos(self) -> None:
+        """Repos with non-active status should not be counted."""
+        active_repo = self.create_repo(project=self.project, name="owner/active")
+        disabled_repo = self.create_repo(project=self.project, name="owner/deleted")
+        disabled_repo.status = ObjectStatus.DISABLED
+        disabled_repo.save()
+        SeerProjectRepository.objects.create(project=self.project, repository=active_repo)
+        SeerProjectRepository.objects.create(project=self.project, repository=disabled_repo)
+
+        response = self.client.get(self.url)
+
+        assert response.status_code == 200
+        assert response.data["reposCount"] == 1
+
+    def test_put_returns_updated_settings(self) -> None:
+        """PUT response should contain the full updated settings object."""
+        response = self.client.put(
+            self.url, data={"agent": "seer", "stoppingPoint": "code_changes"}, format="json"
+        )
+
+        assert response.status_code == 200
+        assert response.data["projectId"] == str(self.project.id)
+        assert response.data["projectSlug"] == self.project.slug
+        assert response.data["agent"] == "seer"
+        assert response.data["stoppingPoint"] == "code_changes"
+        assert "scannerAutomation" in response.data
+        assert "reposCount" in response.data
+
+    def test_put_requires_at_least_one_update_field(self) -> None:
+        """Sending no update fields should return 400."""
+        response = self.client.put(self.url, data={}, format="json")
+        assert response.status_code == 400
+
+    def test_put_requires_integration_id_for_external_agent(self) -> None:
+        """External agent without integrationId should return 400."""
+        response = self.client.put(
+            self.url, data={"agent": "cursor_background_agent"}, format="json"
+        )
+        assert response.status_code == 400
+
+    def test_put_rejects_integration_id_from_other_org(self) -> None:
+        """An integration ID that doesn't belong to this org should return 400."""
+        other_org = self.create_organization()
+        integration = self.create_integration(
+            organization=other_org, external_id="other", provider="github"
+        )
+
+        response = self.client.put(
+            self.url,
+            data={"agent": "cursor_background_agent", "integrationId": integration.id},
+            format="json",
+        )
+        assert response.status_code == 400
+
+    def test_put_seer_agent_does_not_require_integration_id(self) -> None:
+        """agent=seer should not require integrationId."""
+        response = self.client.put(self.url, data={"agent": "seer"}, format="json")
+        assert response.status_code == 200
+
+    def test_put_rejects_invalid_agent(self) -> None:
+        """An unrecognized agent value should return 400."""
+        response = self.client.put(self.url, data={"agent": "invalid"}, format="json")
+        assert response.status_code == 400
+
+    def test_put_rejects_invalid_stopping_point(self) -> None:
+        """An unrecognized stoppingPoint value should return 400."""
+        response = self.client.put(self.url, data={"stoppingPoint": "invalid"}, format="json")
+        assert response.status_code == 400
+
+    def test_put_creates_audit_log_entry(self) -> None:
+        """PUT should create an audit log entry with the project ID."""
+        from sentry.models.auditlogentry import AuditLogEntry
+        from sentry.silo.base import SiloMode
+        from sentry.testutils.outbox import outbox_runner
+        from sentry.testutils.silo import assume_test_silo_mode
+
+        with outbox_runner():
+            self.client.put(
+                self.url,
+                data={"scannerAutomation": False},
+                format="json",
+            )
+
+        with assume_test_silo_mode(SiloMode.CONTROL):
+            entry = AuditLogEntry.objects.filter(
+                organization_id=self.organization.id,
+            ).first()
+
+            assert entry is not None
+            assert entry.data["project_id"] == self.project.id