diff --git a/src/sentry/seer/entrypoints/slack/metrics.py b/src/sentry/seer/entrypoints/slack/metrics.py
index 313ea56743d5..cf1e41588af8 100644
--- a/src/sentry/seer/entrypoints/slack/metrics.py
+++ b/src/sentry/seer/entrypoints/slack/metrics.py
@@ -6,6 +6,7 @@
 class ProcessMentionHaltReason(StrEnum):
     IDENTITY_NOT_LINKED = "identity_not_linked"
     USER_NOT_ORG_MEMBER = "user_not_org_member"
+    OUT_OF_SEER_CREDITS = "out_of_seer_credits"
 
 
 class ProcessMentionFailureReason(StrEnum):
diff --git a/src/sentry/seer/entrypoints/slack/tasks.py b/src/sentry/seer/entrypoints/slack/tasks.py
index c9b4376816c7..1074d7751c9d 100644
--- a/src/sentry/seer/entrypoints/slack/tasks.py
+++ b/src/sentry/seer/entrypoints/slack/tasks.py
@@ -14,6 +14,7 @@
 from sentry.integrations.services.integration.service import integration_service
 from sentry.models.organization import Organization
 from sentry.notifications.platform.slack.provider import SlackRenderable
+from sentry.seer.credits import SeerFeature, SeerOperation, can_run_seer_operation
 from sentry.seer.entrypoints.metrics import (
     SlackEntrypointEventLifecycleMetric,
     SlackEntrypointInteractionType,
@@ -160,6 +161,19 @@ def process_mention_for_slack(
             )
             return
 
+        # Check credits before fetching context or starting a run.
+        if not can_run_seer_operation(
+            organization, SeerFeature.EXPLORER, SeerOperation.AGENT_CHAT_MESSAGE
+        ):
+            lifecycle.record_halt(ProcessMentionHaltReason.OUT_OF_SEER_CREDITS)
+            # The webhook set "is thinking..." before queueing this task; clear it.
+            entrypoint.install.set_thread_status(
+                channel_id=channel_id,
+                thread_ts=thread_ts or ts,
+                status="",
+            )
+            return
+
         prompt = extract_prompt(text, bot_user_id)
 
         linked_result = _resolve_linked_messages(
diff --git a/tests/sentry/seer/entrypoints/slack/test_tasks.py b/tests/sentry/seer/entrypoints/slack/test_tasks.py
index 2891851e0f72..97d1f137c0dc 100644
--- a/tests/sentry/seer/entrypoints/slack/test_tasks.py
+++ b/tests/sentry/seer/entrypoints/slack/test_tasks.py
@@ -8,6 +8,7 @@
 from django.test import override_settings
 
 from sentry.integrations.messaging.metrics import SeerSlackHaltReason
+from sentry.seer.credits import SeerFeature, SeerOperation
 from sentry.seer.entrypoints.slack.analytics import (
     SlackSeerAgentConversation,
     SlackSeerAgentFeedback,
@@ -401,6 +402,105 @@ def test_skips_analytics_when_trigger_agent_fails(
         assert_not_analytics_event(mock_record, SlackSeerAgentResponded)
 
 
+class ProcessMentionSeerCreditsTest(TestCase):
+    def setUp(self) -> None:
+        super().setUp()
+        self.mock_entrypoint = MagicMock()
+        self.mock_entrypoint.thread_ts = "1234567890.123456"
+        self.mock_entrypoint.install.get_thread_history.return_value = []
+
+    def _run_task(
+        self, *, user_id: int, mock_agent_cls: MagicMock, mock_resolve_user: MagicMock
+    ) -> None:
+        mock_resolve_user.return_value = MagicMock(id=user_id, username="alice")
+        mock_agent_cls.return_value = self.mock_entrypoint
+        process_mention_for_slack(**{**TASK_KWARGS, "organization_id": self.organization.id})
+
+    @patch("sentry.integrations.utils.metrics.EventLifecycle.record_event")
+    @patch("sentry.seer.entrypoints.slack.tasks.can_run_seer_operation", return_value=False)
+    @patch("sentry.seer.entrypoints.slack.tasks.SeerAgentOperator")
+    @patch("sentry.seer.entrypoints.slack.tasks.SlackAgentEntrypoint")
+    @patch("sentry.seer.entrypoints.slack.tasks._resolve_user")
+    def test_out_of_credits_halts_without_running(
+        self,
+        mock_resolve_user: MagicMock,
+        mock_agent_cls: MagicMock,
+        mock_operator_cls: MagicMock,
+        mock_can_run: MagicMock,
+        mock_record: MagicMock,
+    ) -> None:
+        mock_operator_cls.has_access.return_value = True
+
+        self._run_task(
+            user_id=self.user.id, mock_agent_cls=mock_agent_cls, mock_resolve_user=mock_resolve_user
+        )
+
+        mock_can_run.assert_called_once_with(
+            self.organization, SeerFeature.EXPLORER, SeerOperation.AGENT_CHAT_MESSAGE
+        )
+        mock_operator_cls.assert_not_called()
+        self.mock_entrypoint.install.get_thread_history.assert_not_called()
+        self.mock_entrypoint.install.set_thread_status.assert_called_once_with(
+            channel_id="C1234567890",
+            thread_ts="1234567890.123456",
+            status="",
+        )
+        assert_halt_metric(mock_record, ProcessMentionHaltReason.OUT_OF_SEER_CREDITS)
+
+    @patch("sentry.seer.credits.seer_credit.backend.check_seer_credits")
+    @patch("sentry.seer.entrypoints.slack.tasks.SeerAgentOperator")
+    @patch("sentry.seer.entrypoints.slack.tasks.SlackAgentEntrypoint")
+    @patch("sentry.seer.entrypoints.slack.tasks._resolve_user")
+    def test_credit_check_flag_on_with_enough_credits_runs(
+        self,
+        mock_resolve_user: MagicMock,
+        mock_agent_cls: MagicMock,
+        mock_operator_cls: MagicMock,
+        mock_check: MagicMock,
+    ) -> None:
+        mock_operator_cls.has_access.return_value = True
+        mock_operator_cls.return_value.trigger_agent.return_value = None
+        mock_check.return_value = MagicMock(has_enough_credits=True)
+
+        with self.feature(
+            ["organizations:seer-credit-checks", "organizations:token-billed-seer-enabled"]
+        ):
+            self._run_task(
+                user_id=self.user.id,
+                mock_agent_cls=mock_agent_cls,
+                mock_resolve_user=mock_resolve_user,
+            )
+
+        mock_check.assert_called_once()
+        mock_operator_cls.return_value.trigger_agent.assert_called_once()
+
+    @patch("sentry.seer.credits.seer_credit.backend.check_seer_credits")
+    @patch("sentry.seer.entrypoints.slack.tasks.SeerAgentOperator")
+    @patch("sentry.seer.entrypoints.slack.tasks.SlackAgentEntrypoint")
+    @patch("sentry.seer.entrypoints.slack.tasks._resolve_user")
+    def test_credit_check_flag_on_without_enough_credits_halts(
+        self,
+        mock_resolve_user: MagicMock,
+        mock_agent_cls: MagicMock,
+        mock_operator_cls: MagicMock,
+        mock_check: MagicMock,
+    ) -> None:
+        mock_operator_cls.has_access.return_value = True
+        mock_check.return_value = MagicMock(has_enough_credits=False)
+
+        with self.feature(
+            ["organizations:seer-credit-checks", "organizations:token-billed-seer-enabled"]
+        ):
+            self._run_task(
+                user_id=self.user.id,
+                mock_agent_cls=mock_agent_cls,
+                mock_resolve_user=mock_resolve_user,
+            )
+
+        mock_check.assert_called_once()
+        mock_operator_cls.assert_not_called()
+
+
 class LinkedMessagesContextTest(TestCase):
     """Tests for the Slack-permalink → on_page_context wiring."""