diff --git a/docs/typetalk b/docs/typetalk
new file mode 100644
index 000000000..2353b1f79
--- /dev/null
+++ b/docs/typetalk
@@ -0,0 +1,13 @@
+Typetalk
+======
+
+Posts a message to [Typetalk](https://typetalk.in) topics when you push to GitHub.
+
+Install Notes
+-------------
+
+1. Need to [register new application](https://typetalk.in/my/develop/applications) that authorises GitHub to access to the Typetalk API. (Grant type must be "Client Credentials")
+2. Enter your credentials.
+   - client_id
+   - client_secret
+3. Enter topic id to post messages.
diff --git a/lib/services/typetalk.rb b/lib/services/typetalk.rb
new file mode 100644
index 000000000..46461f9d2
--- /dev/null
+++ b/lib/services/typetalk.rb
@@ -0,0 +1,53 @@
+class Service::Typetalk < Service::HttpPost
+  string :client_id, :topic, :restrict_to_branch
+  password :client_secret
+  white_list :topic, :restrict_to_branch
+
+  default_events :push
+
+  url "http://typetalk.in"
+  logo_url "https://deeb7lj8m1sjw.cloudfront.net/1.3.5/assets/images/common/logo.png"
+
+  def receive_event
+    raise_config_error "Missing 'client_id'"     if data['client_id'].to_s == ''
+    raise_config_error "Missing 'client_secret'" if data['client_secret'].to_s == ''
+    raise_config_error "Missing 'topic'"         if data['topic'].to_s == ''
+
+    if event.to_s == 'push'
+      branch = payload['ref'].split('/').last
+      branch_restriction = data['restrict_to_branch'].to_s
+      if branch_restriction.length > 0 && branch_restriction.index(branch) == nil
+        return
+      end
+    end
+
+    http.url_prefix = 'https://typetalk.in'
+    http.headers['X-GitHub-Event'] = event.to_s
+    
+    # get an access_token
+    res = http_post '/oauth2/access_token',
+                    { :client_id     => data['client_id'],
+                      :client_secret => data['client_secret'],
+                      :grant_type    => 'client_credentials',
+                      :scope         => 'topic.post',}
+
+    json = JSON.parse(res.body)
+    http.headers['Authorization'] = "Bearer #{json['access_token']}"
+
+    topics = data['topic'].to_s.split(",")
+    topics.each do |topic|
+      params = {
+        :message => format_pushed_message(payload)
+      }
+      res = http_post "/api/v1/topics/#{topic}", params
+      if res.status < 200 || res.status > 299
+        raise_config_error
+      end
+    end
+  end
+
+  def format_pushed_message(payload)
+    branch = payload['ref'].split('/').last
+    return "#{payload['pusher']['name']} has pushed #{payload['commits'].size} commit(s) to #{branch} at #{payload['repository']['name']}\n#{payload['compare']}"
+  end
+end
diff --git a/test/typetalk_test.rb b/test/typetalk_test.rb
new file mode 100644
index 000000000..eb0738fec
--- /dev/null
+++ b/test/typetalk_test.rb
@@ -0,0 +1,48 @@
+require File.expand_path('../helper', __FILE__)
+
+class TypetalkTest < Service::TestCase
+  def setup
+    @stubs = Faraday::Adapter::Test::Stubs.new
+  end
+
+  def test_push
+    @stubs.post "/oauth2/access_token" do |env|
+      form = Faraday::Utils.parse_query(env[:body])
+      assert_equal 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', form['client_id']
+      assert_equal 'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb', form['client_secret']
+      assert_equal 'client_credentials', form['grant_type']
+      assert_equal 'topic.post', form['scope']
+      [200, {}, '{ "access_token": "TestToken" }']
+    end
+    @stubs.post "/api/v1/topics/1" do |env|
+      form = Faraday::Utils.parse_query(env[:body])
+      headers = env[:request_headers]
+      assert_equal 'Bearer TestToken', headers['Authorization']
+      assert_equal "dragon3 has pushed 2 commit(s) to master at dragon3/github-services\nhttps://github.com/dragon3/github-services/compare/06f63b43050935962f84fe54473a7c5de7977325...06f63b43050935962f84fe54473a7c5de7977326", form['message']
+      [200, {}, '']
+    end
+
+    svc = service({'client_id' => 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa',
+                   'client_secret' => 'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb',
+                   'topic' => '1'}, payload_for_test)
+    svc.receive_event
+  end
+
+  def service(*args)
+    super Service::Typetalk, *args
+  end
+
+  def payload_for_test
+    {
+      'ref'        => 'refs/heads/master',
+      'compare'    => 'https://github.com/dragon3/github-services/compare/06f63b43050935962f84fe54473a7c5de7977325...06f63b43050935962f84fe54473a7c5de7977326',
+      'pusher'     => { 'name' => 'dragon3', },
+      'commits'    => [
+                       {'id' => '06f63b43050935962f84fe54473a7c5de7977325'},
+                       {'id' => '06f63b43050935962f84fe54473a7c5de7977326'}],
+      'repository' => {'name' => 'dragon3/github-services'},
+    }
+  end
+
+end
+