diff --git a/lib/heap/client.rb b/lib/heap/client.rb
index e1d16ba..6c1c4df 100644
--- a/lib/heap/client.rb
+++ b/lib/heap/client.rb
@@ -109,18 +109,17 @@ def add_user_properties(identity, properties)
   def track(event, identity, properties = nil)
     ensure_valid_app_id!
 
-    event_name = event.to_s
-    ensure_valid_event_name! event_name
+    ensure_valid_event_name! event
     ensure_valid_identity! identity
 
     body = {
       :app_id => @app_id,
-      :identity => identity.to_s,
-      :event => event,
+      :identity => identity,
+      :event => event
     }
+    ensure_valid_properties! properties
     unless properties.nil?
       body[:properties] = properties
-      ensure_valid_properties! properties
     end
 
     response = connection.post '/api/track', body,
@@ -129,6 +128,32 @@ def track(event, identity, properties = nil)
     self
   end
 
+  # Sends a collection of custom events to the Heap API servers.
+  #
+  # @param [Enumerable<Hash<:event=>String,:identity=>String(,:properties=>Hash)>] events a collection that responds to #each,
+  # which will yield Hashes containing the following key-value pairs:
+  #   :event => String the name of the server-side event; limited to 1024 characters
+  #   :identity => String an e-mail, handle, or Heap-generated user ID
+  #   :properties => Hash<String, String|Number> key-value properties
+  #     associated with the event; each key must have fewer than 1024 characters;
+  #     each value must be a Number or String with fewer than 1024 characters
+  # @return [HeapAPI::Client] self
+  # @see https://heapanalytics.com/docs/server-side#bulk-track
+  def bulk_track(events)
+    ensure_valid_app_id!
+
+    events.each do |event_hash|
+      ensure_valid_event_name! event_hash[:event]
+      ensure_valid_identity! event_hash[:identity]
+      ensure_valid_properties! event_hash[:properties]
+    end
+
+    response = connection.post '/api/track', { :app_id => @app_id, :events => events },
+                               'User-Agent' => user_agent
+    raise HeapAPI::ApiError.new(response) unless response.success?
+    self
+  end
+
   # The underlying Faraday connection used to make HTTP requests.
   #
   # @return [Faraday::Connection] a Faraday connection object
diff --git a/lib/heap/validations.rb b/lib/heap/validations.rb
index e409641..423e627 100644
--- a/lib/heap/validations.rb
+++ b/lib/heap/validations.rb
@@ -17,6 +17,7 @@ def ensure_valid_app_id!
   # @raise ArgumentError if the event name is invalid
   # @return [HeapAPI::Client] self
   def ensure_valid_event_name!(event)
+    event = event.to_s
     raise ArgumentError, 'Missing or empty event name' if event.empty?
     raise ArgumentError, 'Event name too long' if event.length > 1024
     self
@@ -29,17 +30,17 @@ def ensure_valid_event_name!(event)
   # @raise ArgumentError if identity is of an invalid type or too long.
   # @return [HeapAPI::Client] self
   def ensure_valid_identity!(identity)
-    identity = identity.to_s if identity.kind_of?(Integer)
-
-    if identity.kind_of?(String) || identity.kind_of?(Symbol)
-      if identity.to_s.length > 255
-        raise ArgumentError, "Identity field too long; " +
-            "#{identity.to_s.length} is above the 255-character limit"
+    if identity.kind_of?(Integer) || identity.kind_of?(String) || identity.kind_of?(Symbol)
+      identity = identity.to_s
+      if identity.length > 255
+        raise ArgumentError, "Identity field too long; #{identity.length} is above the 255-character limit"
       end
     else
       raise ArgumentError,
         "Unsupported type for identity value #{identity.inspect}"
     end
+
+    self
   end
   private :ensure_valid_identity!
 
@@ -51,27 +52,31 @@ def ensure_valid_identity!(identity)
   # @raise ArgumentError if the property bag is invalid
   # @return [HeapAPI::Client] self
   def ensure_valid_properties!(properties)
+    return self if properties.nil?
     unless properties.respond_to?(:each)
       raise ArgumentError, 'Properties object does not implement #each'
     end
 
     properties.each do |key, value|
-      if key.to_s.length > 1024
-        raise ArgumentError, "Property name #{key} too long; " +
-            "#{key.to_s.length} is above the 1024-character limit"
+      key_length = key.to_s.length
+      if key_length > 1024
+        raise ArgumentError, "Property name #{key} too long; #{key_length} is above the 1024-character limit"
       end
       if value.kind_of? Numeric
         # TODO(pwnall): Check numerical limits, if necessary.
       elsif value.kind_of?(String) || value.kind_of?(Symbol)
-        if value.to_s.length > 1024
+        value_length = value.to_s.length
+        if value_length > 1024
           raise ArgumentError, "Property #{key} value #{value.inspect} too " +
-              "long; #{value.to_s.length} is above the 1024-character limit"
+              "long; #{value_length} is above the 1024-character limit"
         end
       else
         raise ArgumentError,
             "Unsupported type for property #{key} value #{value.inspect}"
       end
     end
+
+    self
   end
   private :ensure_valid_properties!
 end
diff --git a/test/client_test.rb b/test/client_test.rb
index 3f3c75a..4d69009 100644
--- a/test/client_test.rb
+++ b/test/client_test.rb
@@ -6,7 +6,7 @@ def setup
   end
 
   def test_default_app_id
-    assert_equal nil, @heap.app_id
+    assert_nil @heap.app_id
   end
 
   def test_default_stubbed
diff --git a/test/client_track_test.rb b/test/client_track_test.rb
index 79a6aae..01b67f2 100644
--- a/test/client_track_test.rb
+++ b/test/client_track_test.rb
@@ -142,7 +142,7 @@ def test_track_with_integer_identity
     @stubs.post '/api/track' do |env|
       golden_body = {
         'app_id' => 'test-app-id',
-        'identity' => '123456789',
+        'identity' => 123456789,
         'event' => 'test_track',
       }
       assert_equal 'application/json', env[:request_headers]['Content-Type']
@@ -174,6 +174,43 @@ def test_track_with_properties
         'test-identity','foo' => 'bar', :heap => :hurray)
   end
 
+  def test_bulk_track
+    @stubs.post '/api/track' do |env|
+      golden_body = {
+        'app_id' => 'test-app-id',
+        'events' => [
+          {
+            'identity' => '123456789',
+            'event' => 'test_track'
+          },
+          {
+            'identity' => 'test-identity',
+            'event' => 'test_track_with_properties',
+            'properties' => { 'foo' => 'bar', 'heap' => 'hurray' }
+          }
+        ]
+      }
+      assert_equal 'application/json', env[:request_headers]['Content-Type']
+      assert_equal @heap.user_agent, env[:request_headers]['User-Agent']
+      assert_equal golden_body, JSON.parse(env[:body])
+
+      [200, { 'Content-Type' => 'text/plain; encoding=utf8' }, '']
+    end
+
+    assert_equal @heap, @heap.bulk_track(
+      [
+      {
+        :event => 'test_track',
+        :identity => '123456789',
+      },
+      {
+        :event => 'test_track_with_properties',
+        :identity => 'test-identity',
+        :properties => { 'foo' => 'bar', :heap => :hurray }
+      }
+    ])
+  end
+
   def test_track_error
     @stubs.post '/api/track' do |env|
       [400, { 'Content-Type' => 'text/plain; encoding=utf8' }, 'Bad request']
diff --git a/test/heap_test.rb b/test/heap_test.rb
index 6939da3..11f278a 100644
--- a/test/heap_test.rb
+++ b/test/heap_test.rb
@@ -2,7 +2,7 @@
 
 class HeapTest < MiniTest::Test
   def test_heap_app_id
-    assert_equal nil,  Heap.app_id
+    assert_nil Heap.app_id
     begin
       Heap.app_id = 'global-app-id'
       assert_equal 'global-app-id', Heap.app_id