diff --git a/Source/Source.php b/Source/Source.php
old mode 100644
new mode 100755
index 5239fd4..1d0b9dc
--- a/Source/Source.php
+++ b/Source/Source.php
@@ -66,6 +66,8 @@
 
 			'remote_imports'	=> OFF,
 			'import_urls'		=> serialize( array( 'localhost' ) ),
+			
+			'api_key'           => '',
 		);
 	}
 
diff --git a/Source/lang/strings_english.txt b/Source/lang/strings_english.txt
old mode 100644
new mode 100755
index cbe3ea2..31ec2ca
--- a/Source/lang/strings_english.txt
+++ b/Source/lang/strings_english.txt
@@ -141,3 +141,5 @@
 
 $s_plugin_Source_changeset_column_title = 'C';
 
+$s_plugin_Source_api_key = 'Secret API Key';
+$s_plugin_Source_api_key_info = 'This is a password to be used for GitHub and similar cloud-hosted sites that do not have a strict set of IP Addresses to allow.';
\ No newline at end of file
diff --git a/Source/pages/checkin.php b/Source/pages/checkin.php
old mode 100644
new mode 100755
index a03fdf8..2ca0c6b
--- a/Source/pages/checkin.php
+++ b/Source/pages/checkin.php
@@ -49,6 +49,10 @@
 	}
 }
 
+if ( gpc_get_string( 'api_key' ) == plugin_config_get( 'api_key' ) ) {
+	$t_valid = true;
+}
+
 # Not validated by this point gets the boot!
 if ( !$t_valid ) {
 	die( plugin_lang_get( 'invalid_checkin_url' ) );
diff --git a/Source/pages/manage_config.php b/Source/pages/manage_config.php
old mode 100644
new mode 100755
index 47b873b..3d064e6
--- a/Source/pages/manage_config.php
+++ b/Source/pages/manage_config.php
@@ -63,6 +63,8 @@
 $t_checkin_urls = check_urls( $f_checkin_urls );
 $t_import_urls = check_urls( $f_import_urls );
 
+$f_api_key = gpc_get_string( 'api_key' );
+
 function maybe_set_option( $name, $value ) {
 	if ( $value != plugin_config_get( $name ) ) {
 		plugin_config_set( $name, $value );
@@ -120,6 +122,8 @@
 maybe_set_option( 'remote_imports', $f_remote_imports );
 maybe_set_option( 'import_urls', serialize( $t_import_urls ) );
 
+maybe_set_option( 'api_key', $f_api_key );
+
 foreach( SourceVCS::all() as $t_type => $t_vcs ) {
 	if ( $t_vcs->configuration ) {
 		$t_vcs->update_config();
diff --git a/Source/pages/manage_config_page.php b/Source/pages/manage_config_page.php
old mode 100644
new mode 100755
index 341e641..9d433e6
--- a/Source/pages/manage_config_page.php
+++ b/Source/pages/manage_config_page.php
@@ -185,6 +185,12 @@
 ?></textarea></td>
 </tr>
 
+<tr <?php echo helper_alternate_class() ?>>
+<td class="category"><?php echo plugin_lang_get( 'api_key' ) ?></td>
+<td><input name="api_key" size="50" value="<?php echo string_attribute( plugin_config_get( 'api_key' ) ) ?>"/><br/>
+<?php echo plugin_lang_get( 'api_key_info' ) ?></td>
+</tr>
+
 <?php
 foreach( SourceVCS::all() as $t_type => $t_vcs ) {
 	if ( $t_vcs->configuration ) {