diff --git a/.github/workflows/fly.yml b/.github/workflows/fly.yml
index 767be06..915cafb 100644
--- a/.github/workflows/fly.yml
+++ b/.github/workflows/fly.yml
@@ -1,15 +1,18 @@
-name: Fly Deploy
+name: Deploy to Fly.io
+
 on:
-push:
-branches:
-  - main
+  push:
+    branches:
+      - main
+
 env:
-FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
+  FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
+
 jobs:
-deploy:
-  name: Deploy app
-  runs-on: ubuntu-latest
-  steps:
-    - uses: actions/checkout@v3
-    - uses: superfly/flyctl-actions/setup-flyctl@master
-    - run: flyctl deploy --remote-only
+  build-and-deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: superfly/flyctl-actions/setup-flyctl@master
+      - run: flyctl deploy --remote-only
diff --git a/.ruby-version b/.ruby-version
index c0013a8..dcb7d80 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-ruby-2.7.3
+ruby-3.2
diff --git a/Gemfile b/Gemfile
index 9cc39c9..45c4c0b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-ruby '2.7.3'
+ruby '3.2'
 
 gem 'rails', '~> 6.1.6'
 gem 'pg', '~>1.5.0'
@@ -16,6 +16,7 @@ gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
 gem 'bootstrap_form', "~>4.0.0"
 gem 'local_time', '~>2.1.0'
+gem 'stripe', '~>10.1.0'
 
 # API
 gem 'jbuilder', '~> 2.6'
@@ -37,7 +38,7 @@ gem 'bcrypt', '~> 3.1.12'
 gem 'strip_attributes', '~>1.8.0'
 
 # gem install nokogiri -v '1.8.4' -- --use-system-libraries --with-xml2-include=/usr/local/opt/libxml2/include/libxml2
-gem 'nokogiri', '~> 1.13.6'
+gem 'nokogiri', '~> 1.15.4'
 
 gem 'pr_geohash', '~>1.0.0'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 929eeb9..9313b1e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -166,8 +166,8 @@ GEM
       net-protocol
     netrc (0.11.0)
     nio4r (2.5.9)
-    nokogiri (1.13.10)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.15.4)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     pg (1.5.4)
     pr_geohash (1.0.0)
@@ -277,6 +277,7 @@ GEM
       sprockets (>= 3.0.0)
     strip_attributes (1.8.1)
       activemodel (>= 3.0, < 7.0)
+    stripe (10.1.0)
     temple (0.10.3)
     thor (1.3.0)
     tilt (2.3.0)
@@ -321,7 +322,7 @@ DEPENDENCIES
   listen (~> 3.0.5)
   local_time (~> 2.1.0)
   mailgun-ruby (~> 1.1.10)
-  nokogiri (~> 1.13.6)
+  nokogiri (~> 1.15.4)
   pg (~> 1.5.0)
   pr_geohash (~> 1.0.0)
   puma (~> 5.6.4)
@@ -339,6 +340,7 @@ DEPENDENCIES
   spring
   spring-watcher-listen (~> 2.0.0)
   strip_attributes (~> 1.8.0)
+  stripe (~> 10.1.0)
   uglifier (>= 1.3.0)
   varint (~> 0.1.1)
   vcr (~> 4.0.0)
@@ -346,7 +348,7 @@ DEPENDENCIES
   webmock (~> 3.13.0)
 
 RUBY VERSION
-   ruby 2.7.3p183
+   ruby 3.2.0p0
 
 BUNDLED WITH
    2.1.4
diff --git a/Procfile.dev b/Procfile.dev
index 93c3a38..dd9b2f6 100644
--- a/Procfile.dev
+++ b/Procfile.dev
@@ -1 +1,2 @@
-web: ./bin/rails server
\ No newline at end of file
+web: bundle exec rails server -p 3000
+worker: bundle exec sidekiq -t 25 -C config/sidekiq.yml
\ No newline at end of file
diff --git a/app/controllers/api/v1/payment_intents_controller.rb b/app/controllers/api/v1/payment_intents_controller.rb
new file mode 100644
index 0000000..467060f
--- /dev/null
+++ b/app/controllers/api/v1/payment_intents_controller.rb
@@ -0,0 +1,19 @@
+class Api::V1::PaymentIntentsController < Api::V1::ApiController
+  skip_before_action :load_region
+
+  def create
+    if params[:donation_frequency] == 'recurring'
+      @recurring_response = Donations::Recurring.new(params[:donation_amount_in_cents]).run
+      @error = @recurring_response.error
+    else
+      @intent, @error = Donations::OneTime.new(params[:donation_amount_in_cents]).run
+    end
+
+    if @error
+      logger.error(@error.message)
+      head :internal_server_error
+    else
+      respond_to {|format| format.json}
+    end
+  end
+end
diff --git a/app/lib/donations/one_time.rb b/app/lib/donations/one_time.rb
new file mode 100644
index 0000000..debd853
--- /dev/null
+++ b/app/lib/donations/one_time.rb
@@ -0,0 +1,28 @@
+module Donations
+  class OneTime
+    def initialize(donation_amount_in_cents)
+      @donation_amount_in_cents = donation_amount_in_cents
+    end
+
+    def run
+      intent, error = [nil, nil]
+
+      begin
+        intent = Stripe::PaymentIntent.create(
+          {
+            amount: @donation_amount_in_cents,
+            currency: 'usd',
+            # In the latest version of the API, specifying the
+            # `automatic_payment_methods` parameter is optional
+            # because Stripe enables its functionality by default.
+            automatic_payment_methods: { enabled: true },
+          }
+        )
+      rescue Stripe::StripeError => e
+        error = e
+      end
+
+      [intent, error]
+    end
+  end
+end
\ No newline at end of file
diff --git a/app/lib/donations/recurring.rb b/app/lib/donations/recurring.rb
new file mode 100644
index 0000000..6c300da
--- /dev/null
+++ b/app/lib/donations/recurring.rb
@@ -0,0 +1,57 @@
+
+module Donations
+  class Recurring
+    def initialize(donation_amount_in_cents)
+      @donation_amount_in_cents = donation_amount_in_cents
+    end
+
+    def run
+      recurring_response = RecurringResponse.new(@donation_amount_in_cents)
+
+      begin
+        customer = Stripe::Customer.create()
+        recurring_response.customer_id = customer.id
+
+        recurring_response.ephemeral_key = Stripe::EphemeralKey.create(
+          {customer: recurring_response.customer_id},
+          {stripe_version: '2023-08-16'}
+        )
+        recurring_response.subscription = create_subscription(recurring_response.customer_id)
+      rescue Stripe::StripeError => e
+        recurring_response.error = e
+      end
+
+      recurring_response
+    end
+
+    private
+
+    def create_subscription(customer_id)
+      # Create a new price for the custom donation amount
+      price = Stripe::Price.create(
+        unit_amount: @donation_amount_in_cents,
+        currency: 'usd',
+        recurring: { interval: 'month' },
+        product: $stripe_recurring_donation_product_id,
+        )
+
+      # Create or update the subscription with the new price
+      subscription = Stripe::Subscription.create(
+        customer: customer_id,
+        items: [{ price: price.id }],
+        payment_behavior: 'default_incomplete',
+        expand: ['latest_invoice.payment_intent'],
+        )
+
+      subscription
+    end
+  end
+
+  class RecurringResponse
+    attr_accessor :donation_amount_in_cents, :subscription, :ephemeral_key, :error, :customer_id
+
+    def initialize(donation_amount_in_cents)
+      @donation_amount_in_cents = donation_amount_in_cents
+    end
+  end
+end
\ No newline at end of file
diff --git a/app/views/api/v1/payment_intents/create.json.jbuilder b/app/views/api/v1/payment_intents/create.json.jbuilder
new file mode 100644
index 0000000..bc7ffda
--- /dev/null
+++ b/app/views/api/v1/payment_intents/create.json.jbuilder
@@ -0,0 +1,9 @@
+if @recurring_response
+  json.client_secret(@recurring_response.subscription.latest_invoice.payment_intent.client_secret)
+  json.customer_id(@recurring_response.customer_id)
+  json.ephemeral_key(@recurring_response.ephemeral_key.secret)
+else
+  json.client_secret(@intent.client_secret)
+end
+
+json.id(SecureRandom.uuid)
\ No newline at end of file
diff --git a/config/credentials.yml.enc b/config/credentials.yml.enc
index 83af4c1..521fbc2 100644
--- a/config/credentials.yml.enc
+++ b/config/credentials.yml.enc
@@ -1 +1 @@
-MJwZKzEdAdLIxRzkIFbpFmuq/5oDLNqTtY+tYmjCvqxSBiO2TDQirH7As1nZ/ZAMAvyKzMI8134OtGvdq+Lem03Eqo74qNfJlKb6GUIqXbPRx4UaLEmSVSRaKQt5Uk3GUT+4f/SGh9ytlKGbKXWffEZGBfygMYMb+Vm301GMbLLOwusfF1p24luvBZC3dhrpUbsdaBLpZ3yJ6lnpZ9aP+A36nwwnbaeSAomlzvgKLPLyOGpx7XwevkhWxCNVoNJSBJTPlEeXXYVwR+tO9N9GqTotKAzcgY2On/HGkO/CY2qaul9aVxPGbxeS68CtEA8n3dj6OXv4TtykMgWCo5PxIYZempadDfT56lIyhZ/l4huhihElUYHSsdD7ztBGFAzsmOC1ncS35foYHF+JOlWbcVdqz8XFaZ1f+lWTyWwtIPPw/QsFUmEU8UKtzhrXt4+kyKF/WDIENa5AMMzSp52fB5qI8FqYKq/rkA/tGw4p4d1q0THxTaGMzqiAtQjZ5H33fMIeu1gYQ/uxlQ5aOkUZNTU2PcDTM+Kz6ezKbpYRGgYmeXrAqkIJQ/Jth1uXXON2P+5OitgZc58oYis6JLJdVrrDoKuVhq1K4jujQopuLZMsaH/dbCbJwkniEs8SaA5/Iiz6lnS3sDZgo/ZYA9wjZw/rUrjsGtOc9w==--DkBThg2KX7o0BrCe--yvrCQA4Puf8wp4WLCcNpuQ==
\ No newline at end of file
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--XBBlGfnBwetha++2--tU5synzhrItLtVOfnR0mQw==
\ No newline at end of file
diff --git a/config/environments/development.rb b/config/environments/development.rb
index d1d408b..a110c5e 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -3,6 +3,8 @@
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
+  config.hosts << "*.ngrok-free.app"
+
   # In the development environment your application's code is reloaded any time
   # it changes. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
diff --git a/config/initializers/stripe.rb b/config/initializers/stripe.rb
new file mode 100644
index 0000000..d075ebb
--- /dev/null
+++ b/config/initializers/stripe.rb
@@ -0,0 +1,7 @@
+if Rails.env.production?
+  Stripe.api_key = Rails.application.credentials.dig(:stripe_secret_key, :production)
+  $stripe_recurring_donation_product_id = "prod_OqlLl6mR66dLVQ"
+else
+  Stripe.api_key = Rails.application.credentials.dig(:stripe_secret_key, :test)
+  $stripe_recurring_donation_product_id = "prod_P1xUtsgjEfkGgu"
+end
diff --git a/config/routes.rb b/config/routes.rb
index 192b8ac..6fcaa6e 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -17,6 +17,9 @@
 
   namespace :api do
     namespace :v1 do
+      # PaymentIntents (Stripe SDK)
+      resources :payment_intents, only: [:create]
+
       resources :regions, only: [:index] do
 
         get 'vehicles', on: :member, defaults: {format: 'json'}
diff --git a/spec/lib/donations/onetime_spec.rb b/spec/lib/donations/onetime_spec.rb
new file mode 100644
index 0000000..e69de29
diff --git a/spec/lib/donations/recurring_spec.rb b/spec/lib/donations/recurring_spec.rb
new file mode 100644
index 0000000..63d0a59
--- /dev/null
+++ b/spec/lib/donations/recurring_spec.rb
@@ -0,0 +1,55 @@
+require 'rails_helper'
+
+describe "Donations::Recurring" do
+  describe '#initialize' do
+    it 'sets the donation amount' do
+      donation = Donations::Recurring.new(500)
+      expect(donation.instance_variable_get(:@donation_amount_in_cents)).to eq(500)
+    end
+  end
+
+  describe '#run' do
+    before do
+      allow(Stripe::Customer).to receive(:create).and_return(double('Customer', id: 'cus_test'))
+      allow(Stripe::EphemeralKey).to receive(:create).and_return(double('EphemeralKey'))
+      allow_any_instance_of(Donations::Recurring).to receive(:create_subscription).and_return(double('Subscription'))
+    end
+
+    it 'creates a new Stripe customer' do
+      donation = Donations::Recurring.new(500)
+      donation.run
+      expect(Stripe::Customer).to have_received(:create)
+    end
+
+    it 'creates a new Stripe ephemeral key' do
+      donation = Donations::Recurring.new(500)
+      donation.run
+      expect(Stripe::EphemeralKey).to have_received(:create)
+    end
+
+    it 'creates or finds a subscription' do
+      donation = Donations::Recurring.new(500)
+      donation.run
+      expect(donation).to have_received(:create_subscription)
+    end
+  end
+
+  describe '#create_subscription' do
+    before do
+      allow(Stripe::Price).to receive(:create).and_return(double('Price', id: 'price_test'))
+      allow(Stripe::Subscription).to receive(:create).and_return(double('Subscription'))
+    end
+
+    it 'creates a new Stripe price' do
+      donation = Donations::Recurring.new(500)
+      donation.send(:create_subscription, 'cus_test')
+      expect(Stripe::Price).to have_received(:create)
+    end
+
+    it 'creates a new Stripe subscription' do
+      donation = Donations::Recurring.new(500)
+      donation.send(:create_subscription, 'cus_test')
+      expect(Stripe::Subscription).to have_received(:create)
+    end
+  end
+end
\ No newline at end of file
diff --git a/spec/requests/api/v1/payment_intents_spec.rb b/spec/requests/api/v1/payment_intents_spec.rb
new file mode 100644
index 0000000..bea52c9
--- /dev/null
+++ b/spec/requests/api/v1/payment_intents_spec.rb
@@ -0,0 +1,26 @@
+require 'rails_helper'
+
+RSpec.describe "Api::V1::PaymentIntents", type: :request do
+  let(:donation_amount_in_cents) { 1000 }
+
+  describe "POST /create" do
+    it "creates a new PaymentIntent" do
+      allow(Stripe::PaymentIntent).to receive(:create).and_return(OpenStruct.new(client_secret: "12435"))
+      post api_v1_payment_intents_path(format: "json"), params: { donation_amount_in_cents: donation_amount_in_cents }
+      expect(response).to be_successful
+      expect(response.body).to include("12435")
+    end
+
+    context "when there is a Stripe error" do
+      before do
+        allow(Stripe::PaymentIntent).to receive(:create).and_raise(Stripe::StripeError.new)
+      end
+
+      it "returns a 500 status" do
+        post api_v1_payment_intents_path, params: { donation_amount_in_cents: donation_amount_in_cents }
+
+        expect(response).to have_http_status(:internal_server_error)
+      end
+    end
+  end
+end
\ No newline at end of file