diff --git a/api-ref/source/v3/group-type-specs.inc b/api-ref/source/v3/group-type-specs.inc
new file mode 100644
index 00000000000..b284ffcfbfd
--- /dev/null
+++ b/api-ref/source/v3/group-type-specs.inc
@@ -0,0 +1,191 @@
+.. -*- rst -*-
+
+Group type specs
+================
+
+Create group specs for a group type
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. rest_method::  POST /v3/{project_id}/group_types/{group_type_id}/group_specs
+
+Create group specs for a group type, if the specification key already exists in group specs,
+this API will update the specification as well.
+
+
+Normal response codes: 202
+Error response codes: badRequest(400), forbidden(403), itemNotFound(404)
+
+
+Request
+-------
+
+.. rest_parameters:: parameters.yaml
+
+   - group_specs: group_specs_2
+   - group_type_id: group_type_id_1
+   - project_id: project_id_path
+
+Request Example
+---------------
+
+.. literalinclude:: ./samples/group-type-specs-create-request.json
+   :language: javascript
+
+
+
+Response Parameters
+-------------------
+
+.. rest_parameters:: parameters.yaml
+
+   - group_specs: group_specs_2
+
+
+Response Example
+----------------
+
+.. literalinclude:: ./samples/group-type-specs-create-response.json
+   :language: javascript
+
+
+List type specs
+================
+
+List group specs for a group type
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. rest_method::  GET /v3/{project_id}/group_types/{group_type_id}/group_specs
+
+List all the group specs for a group type,
+
+
+Normal response codes: 200
+Error response codes: itemNotFound(404), forbidden(403)
+
+
+Request
+-------
+
+.. rest_parameters:: parameters.yaml
+
+   - group_type_id: group_type_id_1
+   - project_id: project_id_path
+
+
+Response Parameters
+-------------------
+
+.. rest_parameters:: parameters.yaml
+
+   - group_specs: group_specs_2
+
+
+Response Example
+----------------
+
+.. literalinclude:: ./samples/group-type-specs-list-response.json
+   :language: javascript
+
+
+Show type spec
+==============
+
+Show one specific group spec for a group type
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. rest_method::  GET /v3/{project_id}/group_types/{group_type_id}/group_specs/{spec_id}
+
+Show a group spec for a group type,
+
+
+Normal response codes: 200
+Error response codes: itemNotFound(404), forbidden(403)
+
+
+Request
+-------
+
+.. rest_parameters:: parameters.yaml
+
+   - group_type_id: group_type_id_1
+   - project_id: project_id_path
+   - spec_id: spec_id
+
+
+Response Parameters
+-------------------
+
+.. rest_parameters:: parameters.yaml
+
+   - spec: spec_value
+
+Response Example
+----------------
+
+.. literalinclude:: ./samples/group-type-specs-show-response.json
+   :language: javascript
+
+
+Update type spec
+================
+
+Update one specific group spec for a group type
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. rest_method::  PUT /v3/{project_id}/group_types/{group_type_id}/group_specs/{spec_id}
+
+Update a group spec for a group type,
+
+
+Normal response codes: 202
+Error response codes: itemNotFound(404), forbidden(403)
+
+
+Request
+-------
+
+.. rest_parameters:: parameters.yaml
+
+   - group_type_id: group_type_id_1
+   - project_id: project_id_path
+   - spec_id: spec_id
+   - spec: spec_value
+
+
+Response Parameters
+-------------------
+
+.. rest_parameters:: parameters.yaml
+
+   - spec: spec_value
+
+Response Example
+----------------
+
+.. literalinclude:: ./samples/group-type-specs-update-response.json
+   :language: javascript
+
+
+Delete type spec
+================
+
+Delete one specific group spec for a group type
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. rest_method::  DELETE /v3/{project_id}/group_types/{group_type_id}/group_specs/{spec_id}
+
+Delete a group spec for a group type,
+
+
+Normal response codes: 202
+Error response codes: itemNotFound(404), forbidden(403)
+
+
+Request
+-------
+
+.. rest_parameters:: parameters.yaml
+
+   - group_type_id: group_type_id_1
+   - project_id: project_id_path
+   - spec_id: spec_id
diff --git a/api-ref/source/v3/group-types.inc b/api-ref/source/v3/group-types.inc
index 21c3c037c09..6cebbac96d2 100644
--- a/api-ref/source/v3/group-types.inc
+++ b/api-ref/source/v3/group-types.inc
@@ -52,55 +52,6 @@ Response Example
    :language: javascript
 
 
-Create group specs for a group type
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. rest_method::  POST /v3/{project_id}/group_types/{group_type_id}/group_specs
-
-Create group specs for a group type.
-
-
-Normal response codes: 202
-Error response codes: badRequest(400), forbidden(403), itemNotFound(404)
-
-
-Request
--------
-
-.. rest_parameters:: parameters.yaml
-
-   - group_specs: group_specs
-   - group_type: group_type
-   - group_type_id: group_type_id
-   - project_id: project_id_path
-
-Request Example
----------------
-
-.. literalinclude:: ./samples/group-type-specs-create-request.json
-   :language: javascript
-
-
-
-Response Parameters
--------------------
-
-.. rest_parameters:: parameters.yaml
-
-   - is_public: is_public
-   - group_specs: group_specs
-   - description: description
-   - group_type: group_type
-   - name: name
-
-
-Response Example
-----------------
-
-.. literalinclude:: ./samples/group-type-show-response.json
-   :language: javascript
-
-
 Show group type details
 ~~~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/api-ref/source/v3/index.rst b/api-ref/source/v3/index.rst
index 37ad9b33810..a4b524bb48c 100644
--- a/api-ref/source/v3/index.rst
+++ b/api-ref/source/v3/index.rst
@@ -39,6 +39,7 @@ Block Storage API V3 (CURRENT)
 .. include:: groups.inc
 .. include:: group-snapshots.inc
 .. include:: group-types.inc
+.. include:: group-type-specs.inc
 .. include:: hosts.inc
 .. include:: limits.inc
 .. include:: messages.inc
diff --git a/api-ref/source/v3/parameters.yaml b/api-ref/source/v3/parameters.yaml
index eda41dda7d4..1da9078f282 100644
--- a/api-ref/source/v3/parameters.yaml
+++ b/api-ref/source/v3/parameters.yaml
@@ -80,6 +80,12 @@ group_type_id:
   in: path
   required: false
   type: string
+group_type_id_1:
+  description: |
+    The UUID for an existing group type.
+  in: path
+  required: true
+  type: string
 hostname:
   description: |
     The name of the host that hosts the storage back
@@ -357,6 +363,12 @@ sort_key_group_snapshot:
   required: false
   type: string
   min_version: 3.29
+spec_id:
+  description: |
+    The id (key) of the group specification.
+  in: query
+  required: true
+  type: string
 status_query:
   description: |
     Filters results by a status. Default=None.
@@ -898,6 +910,13 @@ group_specs:
   in: body
   required: false
   type: object
+group_specs_2:
+  description: |
+    A set of key and value pairs that contains the
+    specifications for a group type.
+  in: body
+  required: true
+  type: object
 group_type:
   description: |
     A ``group_type`` object.
@@ -1977,6 +1996,12 @@ source_volid_1:
   in: body
   required: true
   type: string
+spec_value:
+  description: |
+    The value of the group specification corresponding to the specified key.
+  in: body
+  required: true
+  type: string
 specs:
   description: |
     A ``specs`` object.
diff --git a/api-ref/source/v3/samples/group-type-specs-create-request.json b/api-ref/source/v3/samples/group-type-specs-create-request.json
index f4324aba0cc..03b7282d955 100644
--- a/api-ref/source/v3/samples/group-type-specs-create-request.json
+++ b/api-ref/source/v3/samples/group-type-specs-create-request.json
@@ -1,6 +1,6 @@
 {
     "group_specs": {
         "key1": "value1",
-        "key2": "value2",
+        "key2": "value2"
     }
 }
diff --git a/api-ref/source/v3/samples/group-type-specs-create-response.json b/api-ref/source/v3/samples/group-type-specs-create-response.json
new file mode 100644
index 00000000000..03b7282d955
--- /dev/null
+++ b/api-ref/source/v3/samples/group-type-specs-create-response.json
@@ -0,0 +1,6 @@
+{
+    "group_specs": {
+        "key1": "value1",
+        "key2": "value2"
+    }
+}
diff --git a/api-ref/source/v3/samples/group-type-specs-list-response.json b/api-ref/source/v3/samples/group-type-specs-list-response.json
new file mode 100644
index 00000000000..03b7282d955
--- /dev/null
+++ b/api-ref/source/v3/samples/group-type-specs-list-response.json
@@ -0,0 +1,6 @@
+{
+    "group_specs": {
+        "key1": "value1",
+        "key2": "value2"
+    }
+}
diff --git a/api-ref/source/v3/samples/group-type-specs-show-response.json b/api-ref/source/v3/samples/group-type-specs-show-response.json
new file mode 100644
index 00000000000..513df0922ff
--- /dev/null
+++ b/api-ref/source/v3/samples/group-type-specs-show-response.json
@@ -0,0 +1,3 @@
+{
+    "key1": "value1"
+}
diff --git a/api-ref/source/v3/samples/group-type-specs-update-response.json b/api-ref/source/v3/samples/group-type-specs-update-response.json
new file mode 100644
index 00000000000..513df0922ff
--- /dev/null
+++ b/api-ref/source/v3/samples/group-type-specs-update-response.json
@@ -0,0 +1,3 @@
+{
+    "key1": "value1"
+}