diff --git a/api.go b/api.go
index f7d9001f4..3d65dba70 100644
--- a/api.go
+++ b/api.go
@@ -127,6 +127,17 @@ func NewAPI(opts ...apiOption) (*API, error) {
 	return api, nil
 }
 
+// Setter for API options.
+func (api *API) SetAPIOpetions(opts ...apiOption) error {
+	for _, opt := range opts {
+		err := opt(api)
+		if err != nil {
+			return errors.Wrap(err, "applying option")
+		}
+	}
+	return nil
+}
+
 // validAPIMethods specifies the api methods that are valid for each
 // cluster state.
 var validAPIMethods = map[disco.ClusterState]map[apiMethod]struct{}{
diff --git a/server/handler_test.go b/server/handler_test.go
index ea6c74e4f..e7212892d 100644
--- a/server/handler_test.go
+++ b/server/handler_test.go
@@ -32,7 +32,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/molecula/featurebase/v2"
+	pilosa "github.com/molecula/featurebase/v2"
 	"github.com/molecula/featurebase/v2/boltdb"
 	"github.com/molecula/featurebase/v2/encoding/proto"
 	"github.com/molecula/featurebase/v2/http"
@@ -344,6 +344,30 @@ func TestHandler_Endpoints(t *testing.T) {
 		}
 	})
 
+	t.Run("SchemaDetailsOff", func(t *testing.T) {
+		cmd.API.SetAPIOpetions(pilosa.OptAPISchemaDetailsOn(false))
+		defer cmd.API.SetAPIOpetions(pilosa.OptAPISchemaDetailsOn(true))
+		w := httptest.NewRecorder()
+		h.ServeHTTP(w, test.MustNewHTTPRequest("GET", "/schema/details", nil))
+		if w.Code != gohttp.StatusOK {
+			t.Fatalf("unexpected status code: %d", w.Code)
+		}
+
+		var bodySchema pilosa.Schema
+		if err := json.Unmarshal(w.Body.Bytes(),
+			&bodySchema); err != nil {
+			t.Fatalf("unexpected unmarshalling error: %v", err)
+		}
+
+		for _, i := range bodySchema.Indexes {
+			for _, f := range i.Fields {
+				if f.Cardinality != nil {
+					t.Fatalf("expected nil cardinality, got: %v", *f.Cardinality)
+				}
+			}
+		}
+	})
+
 	t.Run("Import", func(t *testing.T) {
 		indexInfo, err := cmd.API.Schema(context.Background(), false)
 		if err != nil {