diff --git a/lib/pact/consumer.rb b/lib/pact/consumer.rb
index 37bd7934..e478c919 100644
--- a/lib/pact/consumer.rb
+++ b/lib/pact/consumer.rb
@@ -4,4 +4,5 @@
 require 'pact/consumer/consumer_contract_builders'
 require 'pact/consumer/interaction_builder'
 require 'pact/term'
+require 'pact/provider_param'
 require 'pact/something_like'
diff --git a/lib/pact/provider/matchers/messages.rb b/lib/pact/provider/matchers/messages.rb
index c5ad9fb4..1d01aaa3 100644
--- a/lib/pact/provider/matchers/messages.rb
+++ b/lib/pact/provider/matchers/messages.rb
@@ -1,5 +1,6 @@
 require 'term/ansicolor'
 require 'pact/term'
+require 'pact/provider_param'
 
 module Pact
   module Matchers
diff --git a/lib/pact/provider/request.rb b/lib/pact/provider/request.rb
index 3aaf0662..fef1d611 100644
--- a/lib/pact/provider/request.rb
+++ b/lib/pact/provider/request.rb
@@ -10,8 +10,9 @@ class Replayable
         # See https://github.com/rack/rack/blob/e7d741c6282ca4cf4e01506f5681e6e6b14c0b32/SPEC#L87-89
         NO_HTTP_PREFIX = ["CONTENT-TYPE", "CONTENT-LENGTH"]
 
-        def initialize expected_request
+        def initialize expected_request, provider_params={}
           @expected_request = expected_request
+          @provider_params = provider_params
         end
 
         def method
@@ -19,7 +20,7 @@ def method
         end
 
         def path
-          expected_request.full_path
+          expected_request.full_path(@provider_params)
         end
 
         def body
@@ -35,7 +36,7 @@ def headers
           request_headers = {}
           return request_headers if expected_request.headers.is_a?(Pact::NullExpectation)
           expected_request.headers.each do |key, value|
-            request_headers[rack_request_header_for(key)] = Pact::Reification.from_term(value)
+            request_headers[rack_request_header_for(key)] = Pact::Reification.from_term(value, @provider_params)
           end
           request_headers
         end
diff --git a/lib/pact/provider/rspec.rb b/lib/pact/provider/rspec.rb
index e6ed3c2d..b440ecc5 100644
--- a/lib/pact/provider/rspec.rb
+++ b/lib/pact/provider/rspec.rb
@@ -82,8 +82,8 @@ def describe_interaction interaction, options
             before do | example |
               interaction_context.run_once :before do
                 Pact.configuration.logger.info "Running example '#{Pact::RSpec.full_description(example)}'"
-                set_up_provider_state interaction.provider_state, options[:consumer]
-                replay_interaction interaction
+                call_params = set_up_provider_state interaction.provider_state, options[:consumer]
+                replay_interaction interaction, call_params
                 interaction_context.last_response = last_response
               end
             end
diff --git a/lib/pact/provider/state/provider_state.rb b/lib/pact/provider/state/provider_state.rb
index 435510b0..b7fd46b8 100644
--- a/lib/pact/provider/state/provider_state.rb
+++ b/lib/pact/provider/state/provider_state.rb
@@ -68,6 +68,7 @@ class ProviderState
 
       attr_accessor :name
       attr_accessor :namespace
+      attr_accessor :provider_params
 
       extend Pact::DSL
 
@@ -77,6 +78,11 @@ def initialize name, namespace, &block
         @set_up_defined = false
         @tear_down_defined = false
         @no_op_defined = false
+        @provider_params = {}
+      end
+
+      def provider_param var_name, value
+        @provider_params[var_name] = value
       end
 
       dsl do
diff --git a/lib/pact/provider/state/provider_state_manager.rb b/lib/pact/provider/state/provider_state_manager.rb
index 72457caf..a5b0290c 100644
--- a/lib/pact/provider/state/provider_state_manager.rb
+++ b/lib/pact/provider/state/provider_state_manager.rb
@@ -13,8 +13,11 @@ def set_up_provider_state
         get_global_base_provider_state.set_up
         get_consumer_base_provider_state.set_up
         if provider_state_name
-          get_provider_state.set_up
+          provider_state = get_provider_state
+          provider_state.set_up
+          return provider_state.provider_params
         end
+        return {}
       end
 
       def tear_down_provider_state
diff --git a/lib/pact/provider/test_methods.rb b/lib/pact/provider/test_methods.rb
index 76486685..b8a405c9 100644
--- a/lib/pact/provider/test_methods.rb
+++ b/lib/pact/provider/test_methods.rb
@@ -14,8 +14,8 @@ module TestMethods
       include Pact::Logging
       include Rack::Test::Methods
 
-      def replay_interaction interaction
-        request = Request::Replayable.new(interaction.request)
+      def replay_interaction interaction, provider_params={}
+        request = Request::Replayable.new(interaction.request, provider_params)
         args = [request.path, request.body, request.headers]
 
         logger.info "Sending #{request.method.upcase} request to path: \"#{request.path}\" with headers: #{request.headers}, see debug logs for body"
diff --git a/spec/features/foo_bar_spec.rb b/spec/features/foo_bar_spec.rb
index 9a37bbe5..791c08e3 100644
--- a/spec/features/foo_bar_spec.rb
+++ b/spec/features/foo_bar_spec.rb
@@ -8,37 +8,65 @@
 
 describe "Bar", :pact => true do
 
-  it "can retrieve a thing"  do
-
-      Pact.clear_configuration
-      Pact.clear_consumer_world
+  before :all do
+    Pact.clear_configuration
+    Pact.clear_consumer_world
 
-      Pact.service_consumer "Foo" do
-        has_pact_with "Bar" do
-          mock_service :bar_service do
-            pact_specification_version "2"
-            port 4638
-          end
+    Pact.service_consumer "Foo" do
+      has_pact_with "Bar" do
+        mock_service :bar_service do
+          pact_specification_version "2"
+          port 4638
         end
       end
+    end
+  end
 
-      bar_service.
-        upon_receiving("a retrieve thing request").with({
+  it "can retrieve a thing"  do
+    bar_service.
+      upon_receiving("a retrieve thing request").with({
         method: :get,
         path: '/thing'
       }).
-        will_respond_with({
+      will_respond_with({
         status: 200,
         headers: { 'Content-Type' => 'application/json' },
         body: Pact.each_like({status: Pact.term(/\d+/, "4")})
       })
 
-      bar_response = Net::HTTP.get_response(URI('http://localhost:4638/thing'))
+    bar_response = Net::HTTP.get_response(URI('http://localhost:4638/thing'))
 
-      expect(bar_response.code).to eql '200'
-      expect(JSON.parse(bar_response.body)).to eq [{"status" => "4"}]
+    expect(bar_response.code).to eql '200'
+    expect(JSON.parse(bar_response.body)).to eq [{"status" => "4"}]
 
-      puts bar_service.write_pact
+    puts bar_service.write_pact
   end
 
-end
\ No newline at end of file
+  it 'can retrieve a specific thing with a provider param' do
+    bar_service.
+      upon_receiving("a retrieve specific thing request").with({
+        method: :get,
+        path: Pact.provider_param('/thing/:{id}', {id: '99'}),
+        headers: {
+          Authorization: Pact.provider_param('Bearer :{auth_token}', {auth_token: 'faketoken'})
+        }
+      }).
+      will_respond_with({
+        status: 200,
+        headers: { 'Content-Type' => 'application/json' },
+        body: Pact.each_like({status: Pact.term(/\d+/, "4")})
+      })
+
+    uri = URI('http://localhost:4638/thing/99')
+    req = Net::HTTP::Get.new(uri)
+    req['Authorization'] = 'Bearer faketoken'
+    bar_response = Net::HTTP.start(uri.hostname, uri.port) { |http|
+      http.request(req)
+    }
+
+    expect(bar_response.code).to eql '200'
+    expect(JSON.parse(bar_response.body)).to eq [{"status" => "4"}]
+
+    puts bar_service.write_pact
+  end
+end
diff --git a/spec/features/production_spec.rb b/spec/features/production_spec.rb
index ca4ccef8..662d7854 100644
--- a/spec/features/production_spec.rb
+++ b/spec/features/production_spec.rb
@@ -30,6 +30,11 @@ def find_zebra_names
       end
 
       def call(env)
+        if (env['HTTP_AUTHORIZATION'])
+          if env['HTTP_AUTHORIZATION'] != 'password'
+            return [401, {'Content-Type' => 'application/json'}, {error: "The password is 'password'"}.to_json]
+          end
+        end
         case env['PATH_INFO']
         when "/zebra_names"
             [200, {'Content-Type' => 'application/json'}, { names: find_zebra_names }.to_json]
diff --git a/spec/features/provider_states/zebras.rb b/spec/features/provider_states/zebras.rb
index 916bcf6d..a7e6d47c 100644
--- a/spec/features/provider_states/zebras.rb
+++ b/spec/features/provider_states/zebras.rb
@@ -26,3 +26,18 @@
     FileUtils.rm_rf("tmp/a_mock_database.json")
   end
 end
+
+Pact.provider_state "zebra with provider param" do
+  set_up do
+    some_data = {
+      id: '99',
+      name: 'Zee'
+    }
+    File.open("tmp/a_mock_database.json", "w") { |file| file << some_data.to_json }
+    provider_param :id, '99'
+  end
+
+  tear_down do
+    FileUtils.rm_rf("tmp/a_mock_database.json")
+  end
+end
diff --git a/spec/support/pact_helper.rb b/spec/support/pact_helper.rb
index a994556d..4e77aa1d 100644
--- a/spec/support/pact_helper.rb
+++ b/spec/support/pact_helper.rb
@@ -13,6 +13,8 @@ def call env
 					[200, {'Content-Type' => 'text/plain'}, ['some text']]
 				elsif env['PATH_INFO'] == '/content_type_is_important'
 						[200, {'Content-Type' => 'application/json'}, [{message: "A message", note: "This will cause verify to fail if it using the wrong content type differ."}.to_json]]
+				elsif env['PATH_INFO'] == '/food_item/7'
+					[200, {'Content-Type' => 'application/json'}, [{message: 'One apple'}.to_json]]
 				else
 					raise "unexpected path #{env['PATH_INFO']}!!!"
 				end
@@ -46,6 +48,13 @@ def call env
 
 					WEATHER[:current_state] = 'sunny'
 				end
+
+				provider_state 'create one apple' do
+					set_up do
+						provider_param :item, 'apple'
+						provider_param :id, '7'
+					end
+				end
 			end
 		end
 
diff --git a/spec/support/provider_param.json b/spec/support/provider_param.json
new file mode 100644
index 00000000..112b6f42
--- /dev/null
+++ b/spec/support/provider_param.json
@@ -0,0 +1,46 @@
+{
+  "consumer": {
+    "name": "some-test-consumer"
+  },
+  "provider": {
+    "name": "an unknown provider"
+  },
+  "interactions": [
+    {
+      "description": "a test request",
+      "request": {
+        "method": "get",
+        "path": "/food_item/5",
+        "query": "",
+        "headers": {
+          "Authorization": "Bearer faketoken"
+        },
+        "matchingRules": {
+          "$.path": {
+            "match": "provider_param",
+            "fill_string": "/food_item/:{id}"
+          },
+          "$.headers.Authorization": {
+            "match": "provider_param",
+            "fill_string": "Bearer :{auth_token}"
+          }
+        }
+      },
+      "response": {
+        "matchingRules": {
+          "$.headers.Content-Type" : {
+            "match": "regex", "regex": "json"
+          }
+        },
+        "status": 200,
+        "headers" : {
+          "Content-Type": "foo/json"
+        },
+        "body": {
+          "message" : "One apple"
+        }
+      },
+      "provider_state": "create one apple"
+    }
+  ]
+}
diff --git a/tasks/pact-test.rake b/tasks/pact-test.rake
index 9d49fd2a..7a174e5d 100644
--- a/tasks/pact-test.rake
+++ b/tasks/pact-test.rake
@@ -29,6 +29,10 @@ Pact::VerificationTask.new(:term_v2) do | pact |
 	pact.uri './spec/support/term-v2.json'
 end
 
+Pact::VerificationTask.new(:provider_param) do |pact|
+	pact.uri './spec/support/provider_param.json'
+end
+
 Pact::VerificationTask.new(:case_insensitive_response_header_matching) do | pact |
 	pact.uri './spec/support/case-insensitive-response-header-matching.json', :pact_helper => './spec/support/case-insensitive-response-header-matching.rb'
 end
@@ -68,6 +72,7 @@ namespace :pact do
 		Rake::Task['pact:verify:test_app:content_type'].execute
 		Rake::Task['pact:verify:case_insensitive_response_header_matching'].execute
 		Rake::Task['pact:verify:term_v2'].execute
+		Rake::Task['pact:verify:provider_param'].execute
 	end
 
 	desc "All the verification tests with active support loaded"