diff --git a/Gemfile b/Gemfile
index b8aa689be..4fe2bcb56 100644
--- a/Gemfile
+++ b/Gemfile
@@ -139,3 +139,5 @@ gem 'protected_attributes'
 gem 'message_format'
 
 gem 'openlab_ruby'
+
+gem 'has_secure_token'
diff --git a/Gemfile.lock b/Gemfile.lock
index 5b49a40db..62a082fab 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -164,6 +164,8 @@ GEM
       activerecord (>= 4.0.0)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
+    has_secure_token (1.0.0)
+      activerecord (>= 3.0)
     hashdiff (0.3.0)
     hashie (3.4.2)
     highline (1.7.1)
@@ -452,6 +454,7 @@ DEPENDENCIES
   foreman
   forgery
   friendly_id (~> 5.1.0)
+  has_secure_token
   jbuilder (~> 2.0)
   jquery-rails
   kaminari
diff --git a/app/models/open_api.rb b/app/models/open_api.rb
new file mode 100644
index 000000000..1e18b02f2
--- /dev/null
+++ b/app/models/open_api.rb
@@ -0,0 +1,5 @@
+module OpenAPI
+  def self.table_name_prefix
+    'open_api_'
+  end
+end
diff --git a/app/models/open_api/calls_count_tracing.rb b/app/models/open_api/calls_count_tracing.rb
new file mode 100644
index 000000000..c460e06f4
--- /dev/null
+++ b/app/models/open_api/calls_count_tracing.rb
@@ -0,0 +1,4 @@
+class OpenAPI::CallsCountTracing < ActiveRecord::Base
+  belongs_to :client, foreign_key: :open_api_client_id
+  validates :client, :at, presence: true
+end
diff --git a/app/models/open_api/client.rb b/app/models/open_api/client.rb
new file mode 100644
index 000000000..05d248335
--- /dev/null
+++ b/app/models/open_api/client.rb
@@ -0,0 +1,9 @@
+class OpenAPI::Client < ActiveRecord::Base
+  has_many :calls_count_tracings, foreign_key: :open_api_client_id, dependent: :destroy
+  has_secure_token
+  validates :name, presence: true
+
+  def increment_calls_count
+    update_column(:calls_count, calls_count+1)
+  end
+end
diff --git a/app/models/open_api/parameter_error.rb b/app/models/open_api/parameter_error.rb
new file mode 100644
index 000000000..fd758af24
--- /dev/null
+++ b/app/models/open_api/parameter_error.rb
@@ -0,0 +1 @@
+class OpenAPI::ParameterError < StandardError; end
diff --git a/app/workers/open_api_trace_calls_count_worker.rb b/app/workers/open_api_trace_calls_count_worker.rb
new file mode 100644
index 000000000..1120ddb8b
--- /dev/null
+++ b/app/workers/open_api_trace_calls_count_worker.rb
@@ -0,0 +1,10 @@
+class OpenAPITraceCallsCountWorker < ActiveJob::Base
+  include Sidekiq::Worker
+  sidekiq_options queue: 'default', retry: true
+
+  def perform
+    OpenAPI::Client.find_each do |client|
+      OpenAPI::CallsCountTracing.create!(client: client, calls_count: client.calls_count, at: DateTime.now)
+    end
+  end
+end
diff --git a/config/schedule.yml b/config/schedule.yml
index 09e819987..32ecc8fcb 100644
--- a/config/schedule.yml
+++ b/config/schedule.yml
@@ -14,3 +14,7 @@ generate_statistic:
   cron: "0 1 * * *"
   class: "StatisticWorker"
   queue: default
+
+open_api_trace_calls_count:
+  cron: "0 4 * * 0" # every sunday at 4am
+  class: "OpenAPITraceCallsCountWorker"
diff --git a/db/migrate/20160504085703_create_open_api_clients.rb b/db/migrate/20160504085703_create_open_api_clients.rb
new file mode 100644
index 000000000..fd070547d
--- /dev/null
+++ b/db/migrate/20160504085703_create_open_api_clients.rb
@@ -0,0 +1,10 @@
+class CreateOpenAPIClients < ActiveRecord::Migration
+  def change
+    create_table :open_api_clients do |t|
+      t.string :name
+      t.integer :calls_count, default: 0
+      t.string :token
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/migrate/20160504085905_create_open_api_calls_count_tracings.rb b/db/migrate/20160504085905_create_open_api_calls_count_tracings.rb
new file mode 100644
index 000000000..35e213930
--- /dev/null
+++ b/db/migrate/20160504085905_create_open_api_calls_count_tracings.rb
@@ -0,0 +1,10 @@
+class CreateOpenAPICallsCountTracings < ActiveRecord::Migration
+  def change
+    create_table :open_api_calls_count_tracings do |t|
+      t.belongs_to :open_api_client, foreign_key: true, index: true
+      t.integer :calls_count, null: false
+      t.datetime :at, null: false
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index f346c4f84..67ee62ce5 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160119131623) do
+ActiveRecord::Schema.define(version: 20160504085905) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -267,6 +267,24 @@ ActiveRecord::Schema.define(version: 20160119131623) do
 
   add_index "offer_days", ["subscription_id"], name: "index_offer_days_on_subscription_id", using: :btree
 
+  create_table "open_api_calls_count_tracings", force: :cascade do |t|
+    t.integer  "open_api_client_id"
+    t.integer  "calls_count",        null: false
+    t.datetime "at",                 null: false
+    t.datetime "created_at",         null: false
+    t.datetime "updated_at",         null: false
+  end
+
+  add_index "open_api_calls_count_tracings", ["open_api_client_id"], name: "index_open_api_calls_count_tracings_on_open_api_client_id", using: :btree
+
+  create_table "open_api_clients", force: :cascade do |t|
+    t.string   "name"
+    t.integer  "calls_count", default: 0
+    t.string   "token"
+    t.datetime "created_at",              null: false
+    t.datetime "updated_at",              null: false
+  end
+
   create_table "plans", force: :cascade do |t|
     t.string   "name"
     t.integer  "amount"
@@ -643,6 +661,7 @@ ActiveRecord::Schema.define(version: 20160119131623) do
   add_foreign_key "availability_tags", "availabilities"
   add_foreign_key "availability_tags", "tags"
   add_foreign_key "o_auth2_mappings", "o_auth2_providers"
+  add_foreign_key "open_api_calls_count_tracings", "open_api_clients"
   add_foreign_key "prices", "groups"
   add_foreign_key "prices", "plans"
   add_foreign_key "user_tags", "tags"