diff --git a/nexus/external-api/output/nexus_tags.txt b/nexus/external-api/output/nexus_tags.txt
index 82430ad2e0..a979a9804b 100644
--- a/nexus/external-api/output/nexus_tags.txt
+++ b/nexus/external-api/output/nexus_tags.txt
@@ -30,6 +30,7 @@ probe_create                             POST     /experimental/v1/probes
 probe_delete                             DELETE   /experimental/v1/probes/{probe}
 probe_list                               GET      /experimental/v1/probes
 probe_view                               GET      /experimental/v1/probes/{probe}
+timeseries_query                         POST     /v1/timeseries/query
 
 API operations found with tag "images"
 OPERATION ID                             METHOD   URL PATH
@@ -73,7 +74,6 @@ login_saml                               POST     /login/{silo_name}/saml/{provi
 API operations found with tag "metrics"
 OPERATION ID                             METHOD   URL PATH
 silo_metric                              GET      /v1/metrics/{metric_name}
-timeseries_query                         POST     /v1/timeseries/query
 
 API operations found with tag "policy"
 OPERATION ID                             METHOD   URL PATH
diff --git a/nexus/external-api/src/lib.rs b/nexus/external-api/src/lib.rs
index c62e1b7d27..d04bc1eb34 100644
--- a/nexus/external-api/src/lib.rs
+++ b/nexus/external-api/src/lib.rs
@@ -2567,6 +2567,10 @@ pub trait NexusExternalApi {
         body: TypedBody<params::TimeseriesQuery>,
     ) -> Result<HttpResponseOk<views::OxqlQueryResult>, HttpError>;
 
+    // TODO: list endpoint for project-scoped schemas is blocked on
+    // https://github.com/oxidecomputer/omicron/issues/5942: the authz scope for
+    // each schema is not stored in Clickhouse yet.
+
     /// Run project-scoped timeseries query
     ///
     /// Queries are written in OxQL. Project must be specified by name or ID in
@@ -2575,7 +2579,7 @@ pub trait NexusExternalApi {
     #[endpoint {
         method = POST,
         path = "/v1/timeseries/query",
-        tags = ["metrics"],
+        tags = ["hidden"],
     }]
     async fn timeseries_query(
         rqctx: RequestContext<Self::Context>,
diff --git a/openapi/nexus.json b/openapi/nexus.json
index f8195bc964..7926ef697a 100644
--- a/openapi/nexus.json
+++ b/openapi/nexus.json
@@ -8893,7 +8893,7 @@
     "/v1/timeseries/query": {
       "post": {
         "tags": [
-          "metrics"
+          "hidden"
         ],
         "summary": "Run project-scoped timeseries query",
         "description": "Queries are written in OxQL. Project must be specified by name or ID in URL query parameter. The OxQL query will only return timeseries data from the specified project.",