diff --git a/lib/active_merchant/billing/gateways/quickbooks_oauth2.rb b/lib/active_merchant/billing/gateways/quickbooks_oauth2.rb
new file mode 100644
index 00000000000..3d9d4087463
--- /dev/null
+++ b/lib/active_merchant/billing/gateways/quickbooks_oauth2.rb
@@ -0,0 +1,274 @@
+module ActiveMerchant #:nodoc:
+  module Billing #:nodoc:
+    class QuickbooksOauth2Gateway < Gateway
+      self.test_url = 'https://sandbox.api.intuit.com'
+      self.live_url = 'https://api.intuit.com'
+
+      self.supported_countries = ['US']
+      self.default_currency = 'USD'
+      self.supported_cardtypes = [:visa, :master, :american_express, :discover, :diners]
+
+      self.homepage_url = 'http://payments.intuit.com'
+      self.display_name = 'QuickBooks Payments'
+      ENDPOINT =  "/quickbooks/v4/payments/charges"
+
+      # NOT USED ANYWHERE?
+      # OAUTH_ENDPOINTS = {
+      #   site: 'https://oauth.intuit.com',
+      #   request_token_path: '/oauth/v1/get_request_token',
+      #   authorize_url: 'https://appcenter.intuit.com/Connect/Begin',
+      #   access_token_path: '/oauth/v1/get_access_token'
+      # }
+
+      # https://developer.intuit.com/docs/0150_payments/0300_developer_guides/error_handling
+
+      STANDARD_ERROR_CODE_MAPPING = {
+        # Fraud Warnings
+        'PMT-1000' => STANDARD_ERROR_CODE[:processing_error],   # payment was accepted, but refund was unsuccessful
+        'PMT-1001' => STANDARD_ERROR_CODE[:invalid_cvc],        # payment processed, but cvc was invalid
+        'PMT-1002' => STANDARD_ERROR_CODE[:incorrect_address],  # payment processed, incorrect address info
+        'PMT-1003' => STANDARD_ERROR_CODE[:processing_error],   # payment processed, address info couldn't be validated
+
+        # Fraud Errors
+        'PMT-2000' => STANDARD_ERROR_CODE[:incorrect_cvc],      # Incorrect CVC
+        'PMT-2001' => STANDARD_ERROR_CODE[:invalid_cvc],        # CVC check unavaliable
+        'PMT-2002' => STANDARD_ERROR_CODE[:incorrect_address],  # Incorrect address
+        'PMT-2003' => STANDARD_ERROR_CODE[:incorrect_address],  # Address info unavailable
+
+        'PMT-3000' => STANDARD_ERROR_CODE[:processing_error],   # Merchant account could not be validated
+
+        # Invalid Request
+        'PMT-4000' => STANDARD_ERROR_CODE[:processing_error],   # Object is invalid
+        'PMT-4001' => STANDARD_ERROR_CODE[:processing_error],   # Object not found
+        'PMT-4002' => STANDARD_ERROR_CODE[:processing_error],   # Object is required
+
+        # Transaction Declined
+        'PMT-5000' => STANDARD_ERROR_CODE[:card_declined],      # Request was declined
+        'PMT-5001' => STANDARD_ERROR_CODE[:card_declined],      # Merchant does not support given payment method
+
+        # System Error
+        'PMT-6000' => STANDARD_ERROR_CODE[:processing_error],   # A temporary Issue prevented this request from being processed.
+      }
+
+      FRAUD_WARNING_CODES = ['PMT-1000','PMT-1001','PMT-1002','PMT-1003']
+
+      def initialize(options = {})
+        requires!(options, :consumer_key, :consumer_secret, :access_token, :token_secret, :realm)
+        @options = options
+        super
+      end
+
+      def purchase(money, payment, options = {})
+        post = {}
+        add_amount(post, money, options)
+        add_charge_data(post, payment, options)
+        post[:capture] = "true"
+
+        commit(ENDPOINT, post)
+      end
+
+      def authorize(money, payment, options = {})
+        post = {}
+        add_amount(post, money, options)
+        add_charge_data(post, payment, options)
+        post[:capture] = "false"
+
+        commit(ENDPOINT, post)
+      end
+
+      def capture(money, authorization, options = {})
+        post = {}
+        capture_uri = "#{ENDPOINT}/#{CGI.escape(authorization)}/capture"
+        post[:amount] = localized_amount(money, currency(money))
+        add_context(post, options)
+
+        commit(capture_uri, post)
+      end
+
+      def refund(money, authorization, options = {})
+        post = {}
+        post[:amount] = localized_amount(money, currency(money))
+        add_context(post, options)
+
+        commit(refund_uri(authorization), post)
+      end
+
+      def verify(credit_card, options = {})
+        authorize(1.00, credit_card, options)
+      end
+
+      def supports_scrubbing?
+        true
+      end
+
+      def scrub(transcript)
+        transcript.
+          gsub(%r((realm=\")\w+), '\1[FILTERED]').
+          gsub(%r((oauth_consumer_key=\")\w+), '\1[FILTERED]').
+          gsub(%r((oauth_nonce=\")\w+), '\1[FILTERED]').
+          gsub(%r((oauth_signature=\")[a-zA-Z%0-9]+), '\1[FILTERED]').
+          gsub(%r((oauth_token=\")\w+), '\1[FILTERED]').
+          gsub(%r((number\D+)\d{16}), '\1[FILTERED]').
+          gsub(%r((cvc\D+)\d{3}), '\1[FILTERED]')
+      end
+
+      private
+
+      def add_charge_data(post, payment, options = {})
+        add_payment(post, payment, options)
+        add_address(post, options)
+      end
+
+      def add_address(post, options)
+        return unless post[:card] && post[:card].kind_of?(Hash)
+
+        card_address = {}
+        if address = options[:billing_address] || options[:address]
+          card_address[:streetAddress] = address[:address1]
+          card_address[:city] = address[:city]
+          card_address[:region] = address[:state] || address[:region]
+          card_address[:country] = address[:country]
+          card_address[:postalCode] = address[:zip] if address[:zip]
+        end
+        post[:card][:address] = card_address unless card_address.empty?
+      end
+
+      def add_amount(post, money, options = {})
+        currency = options[:currency] || currency(money)
+        post[:amount] = localized_amount(money, currency)
+        post[:currency] = currency.upcase
+      end
+
+      def add_payment(post, payment, options = {})
+        add_creditcard(post, payment, options)
+        add_context(post, options)
+      end
+
+      def add_creditcard(post, creditcard, options = {})
+        card = {}
+        card[:number] = creditcard.number
+        card[:expMonth] = "%02d" % creditcard.month
+        card[:expYear] = creditcard.year
+        card[:cvc] = creditcard.verification_value if creditcard.verification_value?
+        card[:name] = creditcard.name if creditcard.name
+        card[:commercialCardCode] = options[:card_code] if options[:card_code]
+
+        post[:card] = card
+      end
+
+      def add_context(post, options = {})
+        post[:context] = {
+          mobile: options.fetch(:mobile, false),
+          isEcommerce: options.fetch(:ecommerce, true)
+        }
+      end
+
+      def parse(body)
+        JSON.parse(body)
+      end
+
+      def commit(uri, body = {}, method = :post)
+        endpoint = gateway_url + uri
+        # The QuickBooks API returns HTTP 4xx on failed transactions, which causes a
+        # ResponseError raise, so we have to inspect the response and discern between
+        # a legitimate HTTP error and an actual gateway transactional error.
+        response = begin
+          case method
+          when :post
+            ssl_post(endpoint, post_data(body), headers(:post, endpoint))
+          when :get
+            ssl_request(:get, endpoint, nil, headers(:get, endpoint))
+          else
+            raise ArgumentError, "Invalid HTTP method: #{method}. Valid methods are :post and :get"
+          end
+        rescue ResponseError => e
+          extract_response_body_or_raise(e)
+        end
+        response_object(response)
+      end
+
+      def response_object(raw_response)
+        parsed_response = parse(raw_response)
+
+        if parsed_response["code"] == "BadRequest"
+          parsed_response["status"] = "BadRequest"
+          parsed_response["message"] = "Check Quickbooks Connection"
+        end
+        Response.new(
+          success?(parsed_response),
+          message_from(parsed_response),
+          parsed_response,
+          authorization: authorization_from(parsed_response),
+          test: test?,
+          cvv_result: cvv_code_from(parsed_response),
+          error_code: errors_from(parsed_response),
+          fraud_review: fraud_review_status_from(parsed_response)
+        )
+      end
+
+      def gateway_url
+        test? ? test_url : live_url
+      end
+
+      def post_data(data = {})
+        data.to_json
+      end
+
+      def headers(method, uri)
+        raise ArgumentError, "Invalid HTTP method: #{method}. Valid methods are :post and :get" unless [:post, :get].include?(method)
+
+        {
+          "Content-type" => "application/json",
+          "Request-Id" => generate_unique_id,
+          #{}"Authorization" => oauth_headers.join(', ')
+          "Accept" => "application/json",
+          "Authorization" => "Bearer %s" % @options[:access_token],
+        }
+      end
+
+      def cvv_code_from(response)
+        if response['errors'].present?
+          FRAUD_WARNING_CODES.include?(response['errors'].first['code']) ? 'I' : ''
+        else
+          success?(response) ? 'M' : ''
+        end
+      end
+
+      def success?(response)
+      return false if response["code"] == "BadRequest"
+      return FRAUD_WARNING_CODES.concat(['0']).include?(response['errors'].first['code']) if response['errors']
+
+      !['DECLINED', 'CANCELLED'].include?(response['status'])
+      end
+
+      def message_from(response)
+        response['errors'].present? ? response["errors"].map {|error_hash| error_hash["message"] }.join(" ") : response['status']
+      end
+
+      def errors_from(response)
+        response['errors'].present? ? STANDARD_ERROR_CODE_MAPPING[response["errors"].first["code"]] : ""
+      end
+
+      def authorization_from(response)
+        response['id']
+      end
+
+      def fraud_review_status_from(response)
+        response['errors'] && FRAUD_WARNING_CODES.include?(response['errors'].first['code'])
+      end
+
+      def extract_response_body_or_raise(response_error)
+        begin
+          parse(response_error.response.body)
+        rescue JSON::ParserError
+          raise response_error
+        end
+        response_error.response.body
+      end
+
+      def refund_uri(authorization)
+        "#{ENDPOINT}/#{CGI.escape(authorization)}/refunds"
+      end
+    end
+  end
+end