diff --git a/api-ref/source/baremetal-api-v1-node-management.inc b/api-ref/source/baremetal-api-v1-node-management.inc
index 0d543a669a..96f3e833a7 100644
--- a/api-ref/source/baremetal-api-v1-node-management.inc
+++ b/api-ref/source/baremetal-api-v1-node-management.inc
@@ -66,6 +66,7 @@ the Node's driver does not support that interface.
 
 .. rest_parameters:: parameters.yaml
 
+  - bios: v_bios
   - boot: v_boot
   - console: v_console
   - deploy: v_deploy
diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 2db02f8532..5129333f02 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -1844,6 +1844,12 @@ uuid:
   type: string
 
 # variables returned from node-validate
+v_bios:
+  description: |
+    Status of the "bios" interface
+  in: body
+  required: true
+  type: object
 v_boot:
   description: |
     Status of the "boot" interface
diff --git a/releasenotes/notes/bios-interface-api-ref-validate-ddb95461adb0e478.yaml b/releasenotes/notes/bios-interface-api-ref-validate-ddb95461adb0e478.yaml
new file mode 100644
index 0000000000..93a6dd8228
--- /dev/null
+++ b/releasenotes/notes/bios-interface-api-ref-validate-ddb95461adb0e478.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    The bios_interface is returned in the node validate API but it's not in the
+    api-ref documentation. This change adds it to the documentation.