diff --git a/spec/requests/api/private_messages_spec.rb b/spec/requests/api/private_messages_spec.rb
new file mode 100644
index 00000000000..11d19744723
--- /dev/null
+++ b/spec/requests/api/private_messages_spec.rb
@@ -0,0 +1,224 @@
+# frozen_string_literal: true
+require 'swagger_helper'
+
+describe 'private messages' do
+
+  let(:admin) { Fabricate(:admin) }
+
+  before do
+    Jobs.run_immediately!
+    sign_in(admin)
+  end
+
+  path '/topics/private-messages/{username}.json' do
+
+    get 'Get a list of private messages for a user' do
+      tags 'Private Messages'
+      parameter name: :username, in: :path, schema: { type: :string }
+
+      produces 'application/json'
+      response '200', 'private messages' do
+        schema type: :object, properties: {
+          users: {
+            type: :array,
+            items: {
+              type: :object,
+              properties: {
+                id: { type: :integer },
+                username: { type: :string },
+                name: { type: :string },
+                avatar_template: { type: :string },
+              }
+            },
+          },
+          primary_groups: {
+            type: :array,
+            items: {
+            },
+          },
+          topic_list: {
+            type: :object,
+            properties: {
+              can_create_topic: { type: :boolean },
+              draft: { type: :string, nullable: true },
+              draft_key: { type: :string },
+              draft_sequence: { type: :integer },
+              per_page: { type: :integer },
+              topics: {
+                type: :array,
+                items: {
+                  type: :object,
+                  properties: {
+                    id: { type: :integer },
+                    title: { type: :string },
+                    fancy_title: { type: :string },
+                    slug: { type: :string },
+                    posts_count: { type: :integer },
+                    reply_count: { type: :integer },
+                    highest_post_number: { type: :integer },
+                    image_url: { type: :string, nullable: true },
+                    created_at: { type: :string },
+                    last_posted_at: { type: :string },
+                    bumped: { type: :boolean },
+                    bumped_at: { type: :string },
+                    archetype: { type: :string },
+                    unseen: { type: :boolean },
+                    last_read_post_number: { type: :integer },
+                    unread: { type: :integer },
+                    new_posts: { type: :integer },
+                    pinned: { type: :boolean },
+                    unpinned: { type: :string, nullable: true },
+                    visible: { type: :boolean },
+                    closed: { type: :boolean },
+                    archived: { type: :boolean },
+                    notification_level: { type: :integer },
+                    bookmarked: { type: :boolean },
+                    liked: { type: :boolean },
+                    views: { type: :integer },
+                    like_count: { type: :integer },
+                    has_summary: { type: :boolean },
+                    last_poster_username: { type: :string },
+                    category_id: { type: :string, nullable: true },
+                    pinned_globally: { type: :boolean },
+                    featured_link: { type: :string, nullable: true },
+                    allowed_user_count: { type: :integer },
+                    posters: {
+                      type: :array,
+                      items: {
+                        type: :object,
+                        properties: {
+                          extras: { type: :string },
+                          description: { type: :string },
+                          user_id: { type: :integer },
+                          primary_group_id: { type: :string, nullable: true },
+                        }
+                      },
+                    },
+                    participants: {
+                      type: :array,
+                      items: {
+                        type: :object,
+                        properties: {
+                          extras: { type: :string },
+                          description: { type: :string, nullable: true },
+                          user_id: { type: :integer },
+                          primary_group_id: { type: :string, nullable: true },
+                        }
+                      },
+                    },
+                  }
+                },
+              },
+            }
+          },
+        }
+
+        let(:username) { Fabricate(:user).username }
+        run_test!
+      end
+    end
+
+  end
+
+  path '/topics/private-messages-sent/{username}.json' do
+
+    get 'Get a list of private messages sent for a user' do
+      tags 'Private Messages'
+      parameter name: :username, in: :path, schema: { type: :string }
+
+      produces 'application/json'
+      response '200', 'private messages' do
+        schema type: :object, properties: {
+          users: {
+            type: :array,
+            items: {
+              type: :object,
+              properties: {
+                id: { type: :integer },
+                username: { type: :string },
+                name: { type: :string, nullable: true },
+                avatar_template: { type: :string },
+              }
+            },
+          },
+          primary_groups: {
+            type: :array,
+            items: {
+            },
+          },
+          topic_list: {
+            type: :object,
+            properties: {
+              can_create_topic: { type: :boolean },
+              draft: { type: :string, nullable: true },
+              draft_key: { type: :string },
+              draft_sequence: { type: :integer },
+              per_page: { type: :integer },
+              topics: {
+                type: :array,
+                items: {
+                  type: :object,
+                  properties: {
+                    id: { type: :integer },
+                    title: { type: :string },
+                    fancy_title: { type: :string },
+                    slug: { type: :string },
+                    posts_count: { type: :integer },
+                    reply_count: { type: :integer },
+                    highest_post_number: { type: :integer },
+                    image_url: { type: :string, nullable: true },
+                    created_at: { type: :string },
+                    last_posted_at: { type: :string },
+                    bumped: { type: :boolean },
+                    bumped_at: { type: :string },
+                    archetype: { type: :string },
+                    unseen: { type: :boolean },
+                    last_read_post_number: { type: :integer },
+                    unread: { type: :integer },
+                    new_posts: { type: :integer },
+                    pinned: { type: :boolean },
+                    unpinned: { type: :string, nullable: true },
+                    visible: { type: :boolean },
+                    closed: { type: :boolean },
+                    archived: { type: :boolean },
+                    notification_level: { type: :integer },
+                    bookmarked: { type: :boolean },
+                    liked: { type: :boolean },
+                    views: { type: :integer },
+                    like_count: { type: :integer },
+                    has_summary: { type: :boolean },
+                    last_poster_username: { type: :string },
+                    category_id: { type: :string, nullable: true },
+                    pinned_globally: { type: :boolean },
+                    featured_link: { type: :string, nullable: true },
+                    allowed_user_count: { type: :integer },
+                    posters: {
+                      type: :array,
+                      items: {
+                        type: :object,
+                        properties: {
+                          extras: { type: :string },
+                          description: { type: :string },
+                          user_id: { type: :integer },
+                          primary_group_id: { type: :string, nullable: true },
+                        }
+                      },
+                    },
+                    participants: {
+                      type: :array,
+                      items: {
+                      },
+                    },
+                  }
+                },
+              },
+            }
+          },
+        }
+
+        let(:username) { Fabricate(:user).username }
+        run_test!
+      end
+    end
+  end
+end