diff --git a/.gitignore b/.gitignore
index 938d9225..155bf921 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,4 @@
 
 /coverage
 /spec/reports
+spec/reports/pacts
diff --git a/Gemfile b/Gemfile
index 15712840..2f5d85e9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,6 +25,8 @@ gem "whenever", require: false
 
 group :development do
   gem "listen"
+  gem "pact", require: false
+  gem "pact_broker-client"
   gem "spring"
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 6a71945f..7d6a5fc7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -78,6 +78,7 @@ GEM
     addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
+    awesome_print (1.9.2)
     aws-eventstream (1.3.0)
     aws-partitions (1.940.0)
     aws-sdk-core (3.197.0)
@@ -117,12 +118,16 @@ GEM
       bigdecimal
       rexml
     crass (1.0.6)
+    csv (3.3.0)
     date (3.3.4)
     diff-lcs (1.5.1)
+    dig_rb (1.0.1)
     docile (1.4.0)
     domain_name (0.6.20240107)
     drb (2.2.1)
     erubi (1.12.0)
+    expgen (0.1.1)
+      parslet
     factory_bot (6.4.6)
       activesupport (>= 5.0.0)
     factory_bot_rails (6.4.3)
@@ -135,6 +140,7 @@ GEM
     faraday-net_http (3.1.0)
       net-http
     ffi (1.16.3)
+    find_a_port (1.0.1)
     gds-api-adapters (96.0.1)
       addressable
       link_header
@@ -180,6 +186,10 @@ GEM
     http-accept (1.7.0)
     http-cookie (1.0.5)
       domain_name (~> 0.5)
+    httparty (0.22.0)
+      csv
+      mini_mime (>= 1.0.0)
+      multi_xml (>= 0.5.2)
     i18n (1.14.5)
       concurrent-ruby (~> 1.0)
     inflection (1.0.0)
@@ -477,10 +487,39 @@ GEM
       opentelemetry-semantic_conventions
     opentelemetry-semantic_conventions (1.10.0)
       opentelemetry-api (~> 1.0)
+    pact (1.64.0)
+      pact-mock_service (~> 3.0, >= 3.3.1)
+      pact-support (~> 1.16, >= 1.16.9)
+      rack-test (>= 0.6.3, < 3.0.0)
+      rspec (~> 3.0)
+      term-ansicolor (~> 1.7)
+      thor (>= 0.20, < 2.0)
+      webrick (~> 1.8)
+    pact-mock_service (3.11.2)
+      find_a_port (~> 1.0.1)
+      json
+      pact-support (~> 1.16, >= 1.16.4)
+      rack (~> 2.0)
+      rspec (>= 2.14)
+      thor (>= 0.19, < 2.0)
+      webrick (~> 1.8)
+    pact-support (1.20.0)
+      awesome_print (~> 1.9)
+      diff-lcs (~> 1.5)
+      expgen (~> 0.1)
+      rainbow (~> 3.1.1)
+    pact_broker-client (1.75.2)
+      dig_rb (~> 1.0)
+      httparty (>= 0.21.0, < 1.0.0)
+      rake (~> 13.0)
+      table_print (~> 1.5)
+      term-ansicolor (~> 1.7)
+      thor (>= 0.20, < 2.0)
     parallel (1.24.0)
     parser (3.3.2.0)
       ast (~> 2.4.1)
       racc
+    parslet (2.0.0)
     pg (1.5.6)
     plek (5.2.0)
     prometheus_exporter (2.1.0)
@@ -650,9 +689,16 @@ GEM
     statsd-ruby (1.5.0)
     stringio (3.1.0)
     strscan (3.1.0)
+    sync (0.5.0)
+    table_print (1.5.7)
+    term-ansicolor (1.8.0)
+      tins (~> 1.0)
     thor (1.3.1)
     timecop (0.9.9)
     timeout (0.4.1)
+    tins (1.33.0)
+      bigdecimal
+      sync
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.5.0)
@@ -702,6 +748,8 @@ DEPENDENCIES
   listen
   mail-notify
   mlanett-redis-lock
+  pact
+  pact_broker-client
   pg
   plek
   pry-byebug
diff --git a/Rakefile b/Rakefile
index fee1c835..377c52cf 100644
--- a/Rakefile
+++ b/Rakefile
@@ -12,5 +12,11 @@ rescue LoadError
   # Rubocop isn't available in all environments
 end
 
+begin
+  require "pact/tasks"
+rescue LoadError
+  # Pact isn't available in all environments
+end
+
 Rake::Task[:default].clear if Rake::Task.task_defined?(:default)
-task default: %i[rubocop spec]
+task default: %i[rubocop spec pact:verify]
diff --git a/spec/service_consumers/pact_helper.rb b/spec/service_consumers/pact_helper.rb
new file mode 100644
index 00000000..d8f574c1
--- /dev/null
+++ b/spec/service_consumers/pact_helper.rb
@@ -0,0 +1,53 @@
+ENV["PACT_DO_NOT_TRACK"] = "true"
+
+require "pact/provider/rspec"
+require "webmock/rspec"
+require ::File.expand_path("../../config/environment", __dir__)
+
+Pact.configure do |config|
+  config.reports_dir = "spec/reports/pacts"
+  config.include WebMock::API
+  config.include WebMock::Matchers
+end
+
+WebMock.allow_net_connect!
+
+def url_encode(str)
+  ERB::Util.url_encode(str)
+end
+
+Pact.service_provider "Support API" do
+  honours_pact_with "GDS API Adapters" do
+    if ENV["PACT_URI"]
+      pact_uri(ENV["PACT_URI"])
+    else
+      base_url = "https://govuk-pact-broker-6991351eca05.herokuapp.com"
+      path = "pacts/provider/#{url_encode(name)}/consumer/#{url_encode(consumer_name)}"
+      version_modifier = "versions/#{url_encode(ENV.fetch('PACT_CONSUMER_VERSION', 'branch-main'))}"
+
+      pact_uri("#{base_url}/#{path}/#{version_modifier}")
+    end
+  end
+end
+
+Pact.provider_states_for "GDS API Adapters" do
+  provider_state "the parameters are valid" do
+    set_up do
+      params = {
+        subject: "Feedback for app",
+        tags: %w[app_name],
+        user_agent: "Safari",
+        description: "There is something wrong with this page.",
+      }
+      SupportTicket.new(params)
+    end
+  end
+
+  provider_state "the required parameters are not provided" do
+    set_up do
+      params = { subject: "Feedback for app" }
+
+      SupportTicket.new(params)
+    end
+  end
+end