diff --git a/asap-tools/experiments/constants.py b/asap-tools/experiments/constants.py
index ded60da9..1cd434c6 100644
--- a/asap-tools/experiments/constants.py
+++ b/asap-tools/experiments/constants.py
@@ -56,6 +56,8 @@
 PROMETHEUS_REMOTE_WRITE_RECEIVER_FLAG = "--web.enable-remote-write-receiver"
 HTTP_READINESS_CURL_TIMEOUT_SECONDS = 5
 QUERY_ENGINE_RUNTIME_INFO_ENDPOINT = "/api/v1/status/runtimeinfo"
+# The ClickHouse adapter's runtime-info endpoint; it serves no Prometheus API.
+QUERY_ENGINE_CLICKHOUSE_RUNTIME_INFO_ENDPOINT = "/clickhouse/ping"
 # Query engine spill files live in this subdirectory of its output dir, which
 # the container mounts, so host and container paths agree. Results syncs skip it.
 QUERY_ENGINE_SPILL_SUBDIR = "spill"
diff --git a/asap-tools/experiments/experiment_utils/services/query_engine.py b/asap-tools/experiments/experiment_utils/services/query_engine.py
index 29db40a8..46b79564 100644
--- a/asap-tools/experiments/experiment_utils/services/query_engine.py
+++ b/asap-tools/experiments/experiment_utils/services/query_engine.py
@@ -77,6 +77,14 @@ def get_http_port(self) -> int:
         return 8088
 
 
+def runtime_info_endpoint(backend_type: str) -> str:
+    """The readiness endpoint of the engine's query adapter for `backend_type`:
+    the ClickHouse adapter serves no Prometheus API."""
+    if backend_type == "clickhouse":
+        return constants.QUERY_ENGINE_CLICKHOUSE_RUNTIME_INFO_ENDPOINT
+    return constants.QUERY_ENGINE_RUNTIME_INFO_ENDPOINT
+
+
 class QueryEngineRustService(BaseQueryEngineService):
     """Service for managing the Rust query engine process."""
 
@@ -100,6 +108,8 @@ def __init__(
         self.remote_spill_dir: Optional[str] = None
         self.local_spill_report: Optional[str] = None
         self.http_port: Optional[int] = None
+        # The started backend's adapter's; set by start().
+        self.runtime_info_endpoint = constants.QUERY_ENGINE_RUNTIME_INFO_ENDPOINT
 
     # ------------------------------------------------------------------
     # Config-file helpers (used by both bare-metal and containerized paths)
@@ -272,6 +282,7 @@ def start(
             remote_write_port: Port the precompute engine listens on for Prometheus remote
                                write; should match streaming.remote_write.base_port (default 8080)
         """
+        self.runtime_info_endpoint = runtime_info_endpoint(backend_config["type"])
         if spill:
             self.remote_spill_dir = os.path.join(
                 experiment_output_dir, "query_engine_output", SPILL_SUBDIR
@@ -652,7 +663,7 @@ def _is_runtime_info_ready(self) -> bool:
         cmd = (
             f"curl -fsS --max-time {constants.HTTP_READINESS_CURL_TIMEOUT_SECONDS} "
             f"http://127.0.0.1:{self.get_http_port()}"
-            f"{constants.QUERY_ENGINE_RUNTIME_INFO_ENDPOINT} >/dev/null"
+            f"{self.runtime_info_endpoint} >/dev/null"
         )
         result = self.provider.execute_command(
             node_idx=self.node_offset,
diff --git a/asap-tools/experiments/tests/test_victoriametrics_readiness.py b/asap-tools/experiments/tests/test_victoriametrics_readiness.py
index 0a43fb2b..8ca17141 100644
--- a/asap-tools/experiments/tests/test_victoriametrics_readiness.py
+++ b/asap-tools/experiments/tests/test_victoriametrics_readiness.py
@@ -7,7 +7,10 @@
 from constants import BASELINE_EXPERIMENT_NAME, SKETCHDB_EXPERIMENT_NAME
 from experiment_utils.services.base import DockerServiceBase
 from experiment_utils.services.docker_victoriametrics import get_remote_write_urls
-from experiment_utils.services.query_engine import QueryEngineRustService
+from experiment_utils.services.query_engine import (
+    QueryEngineRustService,
+    runtime_info_endpoint,
+)
 
 
 class RemoteWriteConfigurationTest(unittest.TestCase):
@@ -84,6 +87,24 @@ def test_query_engine_requires_runtime_info_endpoint(self):
             provider.execute_command.call_args_list[1].kwargs["cmd"],
         )
 
+    def test_clickhouse_backed_query_engine_probes_its_adapters_endpoint(self):
+        # It serves /clickhouse/ping and 404s on the Prometheus runtime-info
+        # path, so probing that one never saw it ready.
+        provider = Mock()
+        provider.execute_command.return_value = subprocess.CompletedProcess(
+            args="curl", returncode=0, stdout="", stderr=""
+        )
+        service = QueryEngineRustService(provider, use_container=False, node_offset=0)
+        service.runtime_info_endpoint = runtime_info_endpoint("clickhouse")
+
+        self.assertTrue(service._is_runtime_info_ready())
+        self.assertIn(
+            "/clickhouse/ping", provider.execute_command.call_args.kwargs["cmd"]
+        )
+        self.assertEqual(
+            runtime_info_endpoint("prometheus"), "/api/v1/status/runtimeinfo"
+        )
+
 
 if __name__ == "__main__":
     unittest.main()