diff --git a/app/controllers/api/v1/base_controller.rb b/app/controllers/api/v1/base_controller.rb
index 4c43813e9..96744578e 100644
--- a/app/controllers/api/v1/base_controller.rb
+++ b/app/controllers/api/v1/base_controller.rb
@@ -5,12 +5,12 @@ module Api
     class BaseController < ApiController
       rescue_from ActionController::ParameterMissing do |e|
         logger.error e.message
-        render json: {}, status: :bad_request
+        render jsonapi: {}, status: :bad_request
       end
 
       rescue_from ActiveRecord::RecordNotFound do |e|
         logger.error e.message
-        render json: {}, status: :not_found
+        render jsonapi: {}, status: :not_found
       end
     end
   end
diff --git a/app/controllers/api/v1/inventories_controller.rb b/app/controllers/api/v1/inventories_controller.rb
index 136801caa..e8c8ad6b4 100644
--- a/app/controllers/api/v1/inventories_controller.rb
+++ b/app/controllers/api/v1/inventories_controller.rb
@@ -9,18 +9,18 @@ module Api
       def index
         inventories =
           @team.repositories.page(params[:page]).per(params[:page_size])
-        render json: inventories, each_serializer: InventorySerializer
+        render jsonapi: inventories, each_serializer: InventorySerializer
       end
 
       def show
-        render json: @inventory, serializer: InventorySerializer
+        render jsonapi: @inventory, serializer: InventorySerializer
       end
 
       private
 
       def load_team
         @team = Team.find(params.require(:team_id))
-        return render json: {}, status: :forbidden unless can_read_team?(@team)
+        return render jsonapi: {}, status: :forbidden unless can_read_team?(@team)
       end
 
       def load_inventory
diff --git a/app/controllers/api/v1/inventory_items_controller.rb b/app/controllers/api/v1/inventory_items_controller.rb
index f22f1462f..0971c1d78 100644
--- a/app/controllers/api/v1/inventory_items_controller.rb
+++ b/app/controllers/api/v1/inventory_items_controller.rb
@@ -5,6 +5,7 @@ module Api
     class InventoryItemsController < BaseController
       before_action :load_team
       before_action :load_inventory
+      before_action :check_manage_permissions, only: %i(create)
 
       def index
         items =
@@ -12,23 +13,73 @@ module Api
                     .includes(repository_cells: :repository_column)
                     .includes(
                       repository_cells: Extends::REPOSITORY_SEARCH_INCLUDES
-                    ).page(params[:page])
-                    .per(params[:page_size])
-        render json: items,
+                    ).page(params.dig(:page, :number))
+                    .per(params.dig(:page, :size))
+        render jsonapi: items,
                each_serializer: InventoryItemSerializer,
                include: :inventory_cells
       end
 
+      def create
+        attributes = inventory_item_params.merge(
+          created_by: current_user,
+          last_modified_by: current_user
+        )
+        if inventory_cells_params.present?
+          inventory_cells_params
+            .each { |p| p.require(:attributes).require(%i(column_id value)) }
+          item = @inventory.repository_rows.new(attributes)
+          item.transaction do
+            item.save!
+            inventory_cells_params.each do |cell_params|
+              cell_attributes = cell_params[:attributes]
+              column =
+                @inventory.repository_columns.find(cell_attributes[:column_id])
+              RepositoryCell.create_with_value(
+                item, column, cell_attributes[:value], current_user
+              )
+            end
+          end
+        else
+          item = @inventory.repository_rows.create!(attributes)
+        end
+        render jsonapi: item,
+               serializer: InventoryItemSerializer,
+               include: :inventory_cells,
+               status: :created
+      end
+
       private
 
       def load_team
         @team = Team.find(params.require(:team_id))
-        return render json: {}, status: :forbidden unless can_read_team?(@team)
+        return render jsonapi: {}, status: :forbidden unless can_read_team?(@team)
       end
 
       def load_inventory
         @inventory = @team.repositories.find(params.require(:inventory_id))
       end
+
+      def check_manage_permissions
+        unless can_manage_repository_rows?(@team)
+          render body: nil, status: :forbidden
+        end
+      end
+
+      def inventory_item_params
+        unless params.require(:data).require(:type) == 'inventory_items'
+          raise ActionController::BadRequest,
+                'Wrong object type within parameters'
+        end
+        params.require(:data).require(:attributes)
+        params.permit(data: { attributes: %i(name uid) })[:data]
+      end
+
+      # Partially implement sideposting draft
+      # https://github.com/json-api/json-api/pull/1197
+      def inventory_cells_params
+        params[:included]&.select { |el| el[:type] == 'inventory_cells' }
+      end
     end
   end
 end
diff --git a/app/controllers/api/v1/teams_controller.rb b/app/controllers/api/v1/teams_controller.rb
index fdf00d14e..2c8630098 100644
--- a/app/controllers/api/v1/teams_controller.rb
+++ b/app/controllers/api/v1/teams_controller.rb
@@ -5,18 +5,18 @@ module Api
 
       def index
         teams = current_user.teams.page(params[:page]).per(params[:page_size])
-        render json: teams, each_serializer: TeamSerializer
+        render jsonapi: teams, each_serializer: TeamSerializer
       end
 
       def show
-        render json: @team, serializer: TeamSerializer
+        render jsonapi: @team, serializer: TeamSerializer
       end
 
       private
 
       def load_team
         @team = Team.find(params.require(:id))
-        return render json: {}, status: :forbidden unless can_read_team?(@team)
+        return render jsonapi: {}, status: :forbidden unless can_read_team?(@team)
       end
     end
   end
diff --git a/app/models/repository_asset_value.rb b/app/models/repository_asset_value.rb
index c9f564eb1..7e58168af 100644
--- a/app/models/repository_asset_value.rb
+++ b/app/models/repository_asset_value.rb
@@ -22,4 +22,19 @@ class RepositoryAssetValue < ApplicationRecord
   def data
     asset.file_file_name
   end
+
+  def self.new_with_payload(payload, attributes)
+    value = new(attributes)
+    team = value.repository_cell.repository_column.repository.team
+    file = Paperclip.io_adapters.for(payload[:file_data])
+    file.original_filename = payload[:file_name]
+    value.asset = Asset.create!(
+      file: file,
+      created_by: value.created_by,
+      last_modified_by: value.created_by,
+      team: team
+    )
+    value.asset.post_process_file(team)
+    value
+  end
 end
diff --git a/app/models/repository_cell.rb b/app/models/repository_cell.rb
index ab2759573..3bd9ad3f5 100644
--- a/app/models/repository_cell.rb
+++ b/app/models/repository_cell.rb
@@ -31,12 +31,28 @@ class RepositoryCell < ActiveRecord::Base
              end),
              optional: true, foreign_key: :value_id
 
+  validates_inclusion_of :repository_column,
+                         in: (lambda do |cell|
+                           cell.repository_row.repository.repository_columns
+                         end)
   validates :repository_column, presence: true
   validate :repository_column_data_type
   validates :repository_row,
             uniqueness: { scope: :repository_column },
             unless: :importing
 
+  def self.create_with_value(row, column, data, user)
+    cell = new(repository_row: row, repository_column: column)
+    cell.transaction do
+      value_klass = column.data_type.constantize
+      value = value_klass.new_with_payload(data, repository_cell: cell,
+                                                 created_by: user,
+                                                 last_modified_by: user)
+      cell.value = value
+      value.save!
+    end
+  end
+
   private
 
   def repository_column_data_type
diff --git a/app/models/repository_date_value.rb b/app/models/repository_date_value.rb
index ed1609d83..232d914eb 100644
--- a/app/models/repository_date_value.rb
+++ b/app/models/repository_date_value.rb
@@ -17,4 +17,10 @@ class RepositoryDateValue < ApplicationRecord
   def formatted
     data
   end
+
+  def self.new_with_payload(payload, attributes)
+    value = new(attributes)
+    value.data = payload
+    value
+  end
 end
diff --git a/app/models/repository_list_value.rb b/app/models/repository_list_value.rb
index c53856809..72d61390c 100644
--- a/app/models/repository_list_value.rb
+++ b/app/models/repository_list_value.rb
@@ -20,4 +20,13 @@ class RepositoryListValue < ApplicationRecord
     return nil unless repository_list_item
     repository_list_item.data
   end
+
+  def self.new_with_payload(payload, attributes)
+    value = new(attributes)
+    value.repository_list_item = value.repository_cell
+                                      .repository_column
+                                      .repository_list_items
+                                      .find(payload)
+    value
+  end
 end
diff --git a/app/models/repository_text_value.rb b/app/models/repository_text_value.rb
index 194e809dd..c3524aad4 100644
--- a/app/models/repository_text_value.rb
+++ b/app/models/repository_text_value.rb
@@ -18,4 +18,10 @@ class RepositoryTextValue < ApplicationRecord
   def formatted
     data
   end
+
+  def self.new_with_payload(payload, attributes)
+    value = new(attributes)
+    value.data = payload
+    value
+  end
 end
diff --git a/app/serializers/api/v1/inventory_cell_serializer.rb b/app/serializers/api/v1/inventory_cell_serializer.rb
index ff478c9d9..b615f456c 100644
--- a/app/serializers/api/v1/inventory_cell_serializer.rb
+++ b/app/serializers/api/v1/inventory_cell_serializer.rb
@@ -4,16 +4,16 @@ module Api
   module V1
     class InventoryCellSerializer < ActiveModel::Serializer
       type :inventory_cells
-      attributes :id, :data_type, :data
+      attributes :id, :value_type, :value
       attribute :repository_column_id, key: :column_id
 
-      def data_type
+      def value_type
         type_id = RepositoryColumn
                   .data_types[object.repository_column.data_type]
         I18n.t("api.v1.inventory_data_types.t#{type_id}")
       end
 
-      def data
+      def value
         value =
           case object.value_type
           when 'RepositoryTextValue'
@@ -23,7 +23,7 @@ module Api
           when 'RepositoryListValue'
             object.repository_list_value
           when 'RepositoryAssetValue'
-            object.repository_list_value
+            object.repository_asset_value
           end
         ActiveModelSerializers::SerializableResource.new(
           value,
diff --git a/app/serializers/api/v1/inventory_item_serializer.rb b/app/serializers/api/v1/inventory_item_serializer.rb
index 05a1b3d90..3df5dc3f8 100644
--- a/app/serializers/api/v1/inventory_item_serializer.rb
+++ b/app/serializers/api/v1/inventory_item_serializer.rb
@@ -4,7 +4,7 @@ module Api
   module V1
     class InventoryItemSerializer < ActiveModel::Serializer
       type :inventory_items
-      attributes :id, :name
+      attributes :name
       has_many :repository_cells, key: :inventory_cells,
                                   serializer: InventoryCellSerializer,
                                   class_name: 'RepositoryCell'
diff --git a/app/serializers/api/v1/repository_list_value_serializer.rb b/app/serializers/api/v1/repository_list_value_serializer.rb
index 6360b529d..a073ca300 100644
--- a/app/serializers/api/v1/repository_list_value_serializer.rb
+++ b/app/serializers/api/v1/repository_list_value_serializer.rb
@@ -3,8 +3,8 @@
 module Api
   module V1
     class RepositoryListValueSerializer < ActiveModel::Serializer
-      attribute :formatted, key: :value
       attribute :repository_list_item_id, key: :inventory_list_item_id
+      attribute :formatted, key: :inventory_list_item_name
     end
   end
 end
diff --git a/app/serializers/api/v1/repository_text_value_serializer.rb b/app/serializers/api/v1/repository_text_value_serializer.rb
index ea1a51da0..62dab6b2b 100644
--- a/app/serializers/api/v1/repository_text_value_serializer.rb
+++ b/app/serializers/api/v1/repository_text_value_serializer.rb
@@ -3,7 +3,7 @@
 module Api
   module V1
     class RepositoryTextValueSerializer < ActiveModel::Serializer
-      attribute :formatted, key: :value
+      attribute :formatted, key: :text
     end
   end
 end
diff --git a/config/initializers/active_model_serializer.rb b/config/initializers/active_model_serializer.rb
index 692906d54..0258f46a7 100644
--- a/config/initializers/active_model_serializer.rb
+++ b/config/initializers/active_model_serializer.rb
@@ -1,4 +1,6 @@
 # frozen_string_literal: true
 
+require 'active_model_serializers/register_jsonapi_renderer'
+
 ActiveModelSerializers.config.adapter = :json_api
 ActiveModelSerializers.config.key_transform = :unaltered
diff --git a/config/initializers/api.rb b/config/initializers/api.rb
index cad116bbf..8510bec09 100644
--- a/config/initializers/api.rb
+++ b/config/initializers/api.rb
@@ -10,6 +10,7 @@ Api.configure do |config|
   end
 
   config.core_api_v1_preview = true if ENV['CORE_API_V1_PREVIEW']
+  Paperclip::DataUriAdapter.register if ENV['CORE_API_V1_PREVIEW']
 
   vars = ENV.select { |name, _| name =~ /^[[:alnum:]]*_AZURE_AD_APP_ID/ }
   vars.each do |name, value|
diff --git a/config/initializers/mime_types.rb b/config/initializers/mime_types.rb
index 72b582a0a..dc1899682 100644
--- a/config/initializers/mime_types.rb
+++ b/config/initializers/mime_types.rb
@@ -2,4 +2,3 @@
 
 # Add new mime types for use in respond_to blocks:
 # Mime::Type.register "text/richtext", :rtf
-Mime::Type.register 'application/vnd.api+json', :json
diff --git a/config/routes.rb b/config/routes.rb
index a3a1d412f..5c3819723 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -545,11 +545,15 @@ Rails.application.routes.draw do
           resources :teams, only: %i(index show) do
             resources :inventories, only: %i(index show) do
               get 'columns', to: 'inventory_columns#index'
-              get 'items', to: 'inventory_items#index'
+              resources :inventory_items,
+                        only: %i(index create),
+                        path: 'items',
+                        as: :items
             end
           end
           resources :users, only: %i(show) do
-            resources :user_identities, only: %i(index create show update destroy)
+            resources :user_identities,
+                      only: %i(index create show update destroy)
           end
         end
       end
diff --git a/spec/factories/repository_rows.rb b/spec/factories/repository_rows.rb
index c4d83a5f4..b5a113f2f 100644
--- a/spec/factories/repository_rows.rb
+++ b/spec/factories/repository_rows.rb
@@ -2,6 +2,7 @@ FactoryBot.define do
   factory :repository_row do
     name 'Custom row'
     created_by { User.first || association(:user) }
+    repository { Repository.first || create(:repository) }
     last_modified_by { User.first || association(:user) }
   end
 end
diff --git a/spec/requests/api/v1/inventory_items_controller_spec.rb b/spec/requests/api/v1/inventory_items_controller_spec.rb
index 80e28fc80..5da4f1cae 100644
--- a/spec/requests/api/v1/inventory_items_controller_spec.rb
+++ b/spec/requests/api/v1/inventory_items_controller_spec.rb
@@ -75,7 +75,7 @@ RSpec.describe 'Api::V1::InventoryItemsController', type: :request do
       get api_v1_team_inventory_items_path(
         team_id: @teams.first.id,
         inventory_id: @teams.first.repositories.first.id
-      ), params: { page_size: 100 }, headers: @valid_headers
+      ), params: { page: { size: 100 } }, headers: @valid_headers
       expect { hash_body = json }.not_to raise_exception
       expect(hash_body[:data]).to match(
         ActiveModelSerializers::SerializableResource