diff --git a/.rubocop.yml b/.rubocop.yml
index 656507a..bd33f56 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -5,10 +5,10 @@ require:
 
 AllCops:
   Exclude:
-    - "bin/**/*"
-    - "tmp/**/*"
-    - "db/**/*"
-    - "node_modules/**/*"
+    - 'bin/**/*'
+    - 'tmp/**/*'
+    - 'db/**/*'
+    - 'node_modules/**/*'
   TargetRubyVersion: 2.7
 
 Layout/LineLength:
@@ -17,6 +17,10 @@ Layout/LineLength:
 Metrics/MethodLength:
   Max: 15
 
+Metrics/BlockLength:
+  Exclude:
+    - 'spec/**/*.rb'
+
 Layout/ArgumentAlignment:
   EnforcedStyle: with_fixed_indentation
 
diff --git a/Gemfile b/Gemfile
index 3649305..9f7f212 100644
--- a/Gemfile
+++ b/Gemfile
@@ -33,6 +33,7 @@ gem 'bootsnap', '>= 1.4.2', require: false
 
 group :development, :test do
   gem 'byebug', platforms: %i[mri mingw x64_mingw]
+  gem 'pry-rails'
 
   gem 'factory_bot_rails'
   gem 'rspec-rails', '~> 4.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index c4ffec7..a8d3b8b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -73,6 +73,7 @@ GEM
     byebug (11.1.1)
     case_transform (0.2)
       activesupport
+    coderay (1.1.2)
     concurrent-ruby (1.1.6)
     crass (1.0.6)
     diff-lcs (1.3)
@@ -116,6 +117,11 @@ GEM
     parser (2.7.0.4)
       ast (~> 2.4.0)
     pg (1.2.3)
+    pry (0.13.0)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-rails (0.3.9)
+      pry (>= 0.10.4)
     puma (4.3.3)
       nio4r (~> 2.0)
     rack (2.2.2)
@@ -252,6 +258,7 @@ DEPENDENCIES
   jbuilder (~> 2.7)
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)
+  pry-rails
   puma (~> 4.1)
   rails (~> 6.0.2, >= 6.0.2.2)
   rspec-rails (~> 4.0)
diff --git a/app/controllers/api/base_controller.rb b/app/controllers/api/base_controller.rb
new file mode 100644
index 0000000..d0bb8cb
--- /dev/null
+++ b/app/controllers/api/base_controller.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+module API
+  class BaseController < ApplicationController
+  end
+end
diff --git a/app/controllers/api/volunteers_controller.rb b/app/controllers/api/volunteers_controller.rb
new file mode 100644
index 0000000..4692994
--- /dev/null
+++ b/app/controllers/api/volunteers_controller.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module API
+  class VolunteersController < ApplicationController
+    def create
+      volunteer = Volunteer.new(volunteer_params)
+      if volunteer.save
+        render json: volunteer, status: :created
+      else
+        render json: volunteer.errors, status: :unprocessable_entity
+      end
+    end
+
+    private
+
+    def volunteer_params
+      params.require(:volunteer).permit(:fullname, :email, :password, :cellphone, :province, :county, types_of_availability: [])
+    end
+  end
+end
diff --git a/app/serializers/volunteer_serializer.rb b/app/serializers/volunteer_serializer.rb
new file mode 100644
index 0000000..bd4dd2a
--- /dev/null
+++ b/app/serializers/volunteer_serializer.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+class VolunteerSerializer < ApplicationSerializer
+  attributes :id, :fullname, :email, :cellphone, :province, :county, :types_of_availability
+end
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index aa7435f..2617c3c 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections
@@ -12,6 +13,6 @@
 # end
 
 # These inflection rules are supported but not enabled by default:
-# ActiveSupport::Inflector.inflections(:en) do |inflect|
-#   inflect.acronym 'RESTful'
-# end
+ActiveSupport::Inflector.inflections(:en) do |inflect|
+  inflect.acronym 'API'
+end
diff --git a/config/routes.rb b/config/routes.rb
index 5e36ee8..3d4c2d5 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,6 +1,10 @@
 # frozen_string_literal: true
 
 Rails.application.routes.draw do
+  namespace :api, defaults: { format: :json } do
+    resources :volunteers, only: %i[create]
+  end
+
   get '*path', to: 'pages#index', constraints: ->(req) { req.path.exclude? 'storage' }
   root to: 'pages#index'
 end
diff --git a/spec/requests/api/volunteers_request_spec.rb b/spec/requests/api/volunteers_request_spec.rb
new file mode 100644
index 0000000..5218f7d
--- /dev/null
+++ b/spec/requests/api/volunteers_request_spec.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'API::Volunteers', type: :request do
+  let(:headers) { { 'ACCEPT' => 'application/json' } }
+
+  describe 'POST /api/volunteers' do
+    before do
+      post '/api/volunteers', params: params, headers: headers
+    end
+
+    context 'with invalid params' do
+      let(:params) { { volunteer: { fullname: '' } } }
+
+      it { expect(response.content_type).to eq('application/json; charset=utf-8') }
+      it { expect(response).to have_http_status(:unprocessable_entity) }
+
+      it { expect(response.parsed_body['fullname']).to eq(["can't be blank"]) }
+      it { expect(response.parsed_body['email']).to eq(["can't be blank"]) }
+      it { expect(response.parsed_body['password']).to eq(["can't be blank"]) }
+      it { expect(response.parsed_body['cellphone']).to eq(["can't be blank"]) }
+      it { expect(response.parsed_body['province']).to eq(["can't be blank"]) }
+      it { expect(response.parsed_body['county']).to eq(["can't be blank"]) }
+    end
+
+    context 'with valid params' do
+      let(:params) do
+        {
+          volunteer: {
+            fullname: 'John Doe',
+            email: 'john.doe@example.com',
+            password: 'secret$123',
+            cellphone: '924123456',
+            province: 'Luanda',
+            county: 'Belas',
+            types_of_availability: %w[donation_food_clothes psychological_support]
+          }
+        }
+      end
+
+      it { expect(response.content_type).to eq('application/json; charset=utf-8') }
+      it { expect(response).to have_http_status(:created) }
+
+      it { expect(response.parsed_body['fullname']).to eq('John Doe') }
+      it { expect(response.parsed_body['email']).to eq('john.doe@example.com') }
+      it { expect(response.parsed_body['cellphone']).to eq('924123456') }
+      it { expect(response.parsed_body['province']).to eq('Luanda') }
+      it { expect(response.parsed_body['county']).to eq('Belas') }
+      it { expect(response.parsed_body['types_of_availability']).to eq(%w[donation_food_clothes psychological_support]) }
+    end
+  end
+end