diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..e0e606c
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,100 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    activemodel (6.1.7)
+      activesupport (= 6.1.7)
+    activerecord (6.1.7)
+      activemodel (= 6.1.7)
+      activesupport (= 6.1.7)
+    activesupport (6.1.7)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
+    coderay (1.1.3)
+    concurrent-ruby (1.1.10)
+    database_cleaner (2.0.1)
+      database_cleaner-active_record (~> 2.0.0)
+    database_cleaner-active_record (2.0.1)
+      activerecord (>= 5.a)
+      database_cleaner-core (~> 2.0.0)
+    database_cleaner-core (2.0.1)
+    diff-lcs (1.5.0)
+    faker (2.23.0)
+      i18n (>= 1.8.11, < 2)
+    ffi (1.15.5)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
+    listen (3.7.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    method_source (1.0.0)
+    minitest (5.16.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
+    pry (0.14.1)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    rack (2.2.4)
+    rack-contrib (2.3.0)
+      rack (~> 2.0)
+    rack-protection (2.2.2)
+      rack
+    rack-test (1.1.0)
+      rack (>= 1.0, < 3)
+    rake (13.0.6)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
+    require_all (3.0.0)
+    rerun (0.13.1)
+      listen (~> 3.0)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.0)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.0)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.2)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.2)
+      tilt (~> 2.0)
+    sinatra-activerecord (2.0.26)
+      activerecord (>= 4.1)
+      sinatra (>= 1.0)
+    sqlite3 (1.5.3-x86_64-linux)
+    tilt (2.0.11)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
+    zeitwerk (2.6.5)
+
+PLATFORMS
+  x86_64-linux
+
+DEPENDENCIES
+  activerecord (~> 6.1)
+  database_cleaner
+  faker (~> 2.18)
+  pry
+  rack-contrib (~> 2.3)
+  rack-test (~> 1.1)
+  rake
+  require_all
+  rerun
+  rspec
+  sinatra (~> 2.1)
+  sinatra-activerecord
+  sqlite3 (~> 1.4)
+
+BUNDLED WITH
+   2.3.19
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index cf1fcf2..f795a69 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,5 +1,55 @@
 class ApplicationController < Sinatra::Base
-    get '/' do # this is the root route of the application (the homepage) but you can have as many routes as you want
-        {hello: "Just a starting code 😃"}.to_json
+    set :default_content_type, "application/json"
+    before do
+        response.headers["Access-Control-Allow-Origin"]="*"
     end
+
+    options "*" do
+        response.headers["Access-Control-Allow-Methods"]="GET,POST,PUT,PATCH,DELETE,OPTIONS"
+    end
+
+    # to get all buyers
+        get "/buyers" do
+            Buyer.all.to_json
+        end
+
+    # to get all sellers
+        get "/sellers" do
+            Seller.all.to_json
+        end
+
+
+# POST IN buyers
+        post "/buyers" do
+            buyers=Buyer.create(
+                name: params[:name],
+                email: params[:email],
+                password: params[:password]
+            )
+            buyers.to_json
+        end
+
+# DELETE IN Buyers
+        delete "/buyers/:id" do
+            buyers = Buyer.find(params[:id])
+            buyers.destroy
+            {message: "Buyer '#{buyers.name}' has been deleted."}.to_json
+        end
+
+# POST in sellers
+        post "/sellers" do
+            sellers=Seller.create(
+                name: params[:name],
+                email: params[:email],
+                password: params[:password]
+            )
+            sellers.to_json
+        end
+# DELETE IN SELLERS
+    delete "/sellers/:id" do
+        sellers=Seller.find(params[:id])
+        sellers.destroy
+        {message: "seller '#{sellers.name}' has been deleted."}.to_json
+    end     
+        
 end
\ No newline at end of file
diff --git a/app/models/buyer.rb b/app/models/buyer.rb
new file mode 100644
index 0000000..3a98619
--- /dev/null
+++ b/app/models/buyer.rb
@@ -0,0 +1,3 @@
+class Buyer <ActiveRecord::Base
+    
+end
\ No newline at end of file
diff --git a/app/models/product.rb b/app/models/product.rb
new file mode 100644
index 0000000..5c5416a
--- /dev/null
+++ b/app/models/product.rb
@@ -0,0 +1,3 @@
+class Products <ActiveRecord::Base
+    
+end
\ No newline at end of file
diff --git a/app/models/seller.rb b/app/models/seller.rb
new file mode 100644
index 0000000..bdebe05
--- /dev/null
+++ b/app/models/seller.rb
@@ -0,0 +1,3 @@
+class Seller <ActiveRecord::Base
+    
+end
\ No newline at end of file
diff --git a/db/migrate/20221108072722_create_sellers.rb b/db/migrate/20221108072722_create_sellers.rb
new file mode 100644
index 0000000..0f633fd
--- /dev/null
+++ b/db/migrate/20221108072722_create_sellers.rb
@@ -0,0 +1,10 @@
+class CreateSellers < ActiveRecord::Migration[6.1]
+  def change
+    create_table :sellers do |t|
+      t.string :name
+      t.text :email
+      t.text :password
+      t.timestamps
+    end
+  end
+end
diff --git a/db/migrate/20221108072947_create_buyers.rb b/db/migrate/20221108072947_create_buyers.rb
new file mode 100644
index 0000000..c005fcb
--- /dev/null
+++ b/db/migrate/20221108072947_create_buyers.rb
@@ -0,0 +1,10 @@
+class CreateBuyers < ActiveRecord::Migration[6.1]
+  def change
+    create_table :buyers do |t|
+      t.string :name
+      t.text :email
+      t.text :password
+      t.timestamps
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
new file mode 100644
index 0000000..013c111
--- /dev/null
+++ b/db/schema.rb
@@ -0,0 +1,31 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 2022_11_08_072947) do
+
+  create_table "buyers", force: :cascade do |t|
+    t.string "name"
+    t.text "email"
+    t.text "password"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
+  create_table "sellers", force: :cascade do |t|
+    t.string "name"
+    t.text "email"
+    t.text "password"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
+end