diff --git a/lib/incognia_api/client.rb b/lib/incognia_api/client.rb
index 4c752e6..263d8b1 100644
--- a/lib/incognia_api/client.rb
+++ b/lib/incognia_api/client.rb
@@ -1,4 +1,5 @@
 require "time"
+require "pry"
 
 module Incognia
   class Client
@@ -26,6 +27,12 @@ def initialize(client_id:, client_secret:, host:)
     def request(method, endpoint = nil, data = nil, headers = {})
       json_data = JSON.generate(data) if data
 
+      user_agent_header = "incognia-ruby/#{Incognia::VERSION} " + 
+                          "({#{Util::OS_HOST}}) {#{Util::OS_ARCH}} " +
+                          "Ruby/#{Util::LANGUAGE_VERSION}"
+
+      headers.merge!('User-Agent' => user_agent_header)
+
       connection.send(method, endpoint, json_data, headers) do |r|
         r.headers[Faraday::Request::Authorization::KEY] ||= Faraday::Request
           .lookup_middleware(:authorization)
diff --git a/lib/incognia_api/util.rb b/lib/incognia_api/util.rb
index e0a1744..f4b83e8 100644
--- a/lib/incognia_api/util.rb
+++ b/lib/incognia_api/util.rb
@@ -1,5 +1,9 @@
 module Incognia
   module Util
+    OS_HOST = RbConfig::CONFIG['host']
+    OS_ARCH = RbConfig::CONFIG['arch']
+    LANGUAGE_VERSION = RbConfig::CONFIG['ruby_version']
+
     def self.symbolize_names(object)
       case object
       when Hash
diff --git a/spec/client_spec.rb b/spec/client_spec.rb
index ad986bd..30d76be 100644
--- a/spec/client_spec.rb
+++ b/spec/client_spec.rb
@@ -51,6 +51,32 @@ module Incognia
           expect(stub).to have_been_made.once
       end
 
+      it "injects User-Agent header" do
+        user_agent_header = { 'User-Agent' => "incognia-ruby/#{Incognia::VERSION} " +
+                                              "({#{Util::OS_HOST}}) " +
+                                              "{#{Util::OS_ARCH}} " +
+                                              "Ruby/#{Util::LANGUAGE_VERSION}" }
+
+        stub_token_request
+        stub = stub_request(:post, test_endpoint)
+          .with(
+            body: sample_json,
+            headers: user_agent_header
+          ).to_return(
+            status: 200,
+            body: sample_json,
+            headers: { 'Content-Type' => 'application/json' }
+          )
+
+        subject.request(
+          :post,
+          "v2/endpoint",
+          { foo: :bar }
+        )
+
+        expect(stub).to have_been_made.once
+      end
+
       context "when passing an Authorization header" do
         it  "overrides default header" do
           stub = stub_request(:post, test_endpoint).