diff --git a/openapi/components/paths.yaml b/openapi/components/paths.yaml
index a33ea607..ad50f1a5 100644
--- a/openapi/components/paths.yaml
+++ b/openapi/components/paths.yaml
@@ -170,6 +170,8 @@
   $ref: "./paths/groups.yaml#/paths/~1groups~1{groupId}~1posts"
 "/groups/{groupId}/posts/{notificationId}":
   $ref: "./paths/groups.yaml#/paths/~1groups~1{groupId}~1posts~1{notificationId}"
+"/groups/{groupId}/representation":
+  $ref: "./paths/groups.yaml#/paths/~1groups~1{groupId}~1representation"
 "/groups/{groupId}/requests":
   $ref: "./paths/groups.yaml#/paths/~1groups~1{groupId}~1requests"
 "/groups/{groupId}/requests/{userId}":
diff --git a/openapi/components/paths/groups.yaml b/openapi/components/paths/groups.yaml
index 5c01690d..5bdfbc4e 100644
--- a/openapi/components/paths/groups.yaml
+++ b/openapi/components/paths/groups.yaml
@@ -880,6 +880,39 @@ paths:
           $ref: ../responses/groups/GroupNotMemberError.yaml
       security:
         - authCookie: []
+  '/groups/{groupId}/representation':
+    parameters:
+      - $ref: ../parameters.yaml#/groupId
+    put:
+      summary: Update Group Representation
+      description: |-
+        Updates whether the user is representing the group.
+
+        When `isRepresenting` is set to `true`, this flag will be set to `false` for all other groups
+      operationId: updateGroupRepresentation
+      tags:
+        - groups
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                isRepresenting:
+                  type: boolean
+                  description: Whether the user is representing the group.
+              required:
+                - isRepresenting
+      responses:
+        '200':
+          $ref: ../responses/groups/UpdateGroupRepresentationSuccess.yaml
+        '401':
+          $ref: ../responses/MissingCredentialsError.yaml
+        '403':
+          $ref: ../responses/groups/GroupNotMemberError.yaml
+      security:
+        - authCookie: []
   '/groups/{groupId}/instances':
     parameters:
       - $ref: ../parameters.yaml#/groupId
diff --git a/openapi/components/responses/groups/UpdateGroupRepresentationSuccess.yaml b/openapi/components/responses/groups/UpdateGroupRepresentationSuccess.yaml
new file mode 100644
index 00000000..f22c1960
--- /dev/null
+++ b/openapi/components/responses/groups/UpdateGroupRepresentationSuccess.yaml
@@ -0,0 +1,11 @@
+description: Successful response after updating group representation.
+content:
+  application/json:
+    schema:
+      $ref: ../../schemas/Success.yaml
+    examples:
+      Updated Group Representation:
+        value:
+          success:
+            message: Group representation updated!
+            status_code: 200