diff --git a/css/github-embed.css b/css/github-embed.css
index 980f670..43ba1f9 100644
--- a/css/github-embed.css
+++ b/css/github-embed.css
@@ -11,3 +11,14 @@
 	-moz-box-shadow: 2px 2px 2px #ddd;
 	box-shadow: 2px 2px 2px #ddd;
 }
+
+li.github-repo-contributor {
+	clear: both;
+	display: block;
+}
+
+.github-repo-contributor-avatar {
+	float: left;
+	margin-right: 1em;
+	margin-bottom: 0.5em;
+}
\ No newline at end of file
diff --git a/github-api.php b/github-api.php
index c7edfc9..27a3aeb 100644
--- a/github-api.php
+++ b/github-api.php
@@ -1,25 +1,84 @@
 <?php 
 
+
+
+// 0 - none
+define ( 'GEDEBUG_NONE', 0 );
+
+// 1 - call logging only
+define ( 'GEDEBUG_CALL', 1 );
+
+// 2 - calls, and responses
+define ( 'GEDEBUG_RESP', 2 );
+
+// Selected debug level
+define ( 'GITHUB_API_LEVEL', GEDEBUG_NONE );
+
+
 /**
  * This class contains all the functions that actually retrieve information from the GitHub API
  */
 class github_api {
 
 
+	private $client_id = null;
+	private $client_secret = null;
+
+
 
 	/**
-	 * Get a repository from the GitHub API
-	 * @param  string $owner      The repository's owner
-	 * @param  string $repository The respository name
-	 * @return object             The response from the GitHub API
+	 * Allow the client ID / secret to be set, and used for subsequent calls
 	 */
-	public function get_repo ( $owner, $repository ) {
+	function __construct() {
+
+		add_action ( 'plugins_loaded', array ( $this, 'set_credentials' ) );
+		add_filter ( 'http_request_timeout', array ( $this, 'http_request_timeout' ) );
+
+	}
+
+
+
+	/**
+	 * Extend the timeout since API calls can easily exceed 5 seconds
+	 * @param  int $seconds The current timeout setting
+	 * @return int          The revised timeout setting
+	 */
+	function http_request_timeout ( $seconds ) {
+		return 25;
+	}
 
-		$owner = trim ( $owner, '/' );
-		$repository = trim ( $repository, '/' );
 
-		$results = wp_remote_get( "https://api.github.com/repos/$owner/$repository", $args = array (
-		              'user-agent' => 'WordPress Github oEmbed plugin - https://github.com/leewillis77/wp-github-oembed' ) );
+
+	/**
+	 * If you find yourself hitting rate limits, then you can register an application
+	 * with GitHub (http://developer.github.com/v3/oauth/) use the filters here to
+	 * provide the credentials.
+	 */
+	public function set_credentials () {
+
+		$this->client_id = apply_filters ( 'github-embed-client-id', $this->client_id );
+		$this->client_secret = apply_filters ( 'github-embed-client-secret', $this->client_id );
+
+	}
+
+
+
+	private function call_api ( $url ) {
+
+		// Allow users to supply auth details to enable a higher rate limit
+		if ( ! empty ( $this->client_id ) && ! empty ( $this->client_secret ) ) {
+			$url = add_query_arg(array ( 'client_id' => $this->client_id,
+			                     		 'client_secret' => $this->client_secret),
+								$url );
+		}
+
+		$args = array ( 'user-agent' => 'WordPress Github oEmbed plugin - https://github.com/leewillis77/wp-github-oembed');
+		
+		$this->log ( __FUNCTION__." : $url", GEDEBUG_CALL );
+
+		$results = wp_remote_get ( $url, $args );
+
+		$this->log ( __FUNCTION__." : ".print_r($results,1), GEDEBUG_RESP );
 
 		if ( is_wp_error( $results ) ||
 		    ! isset ( $results['response']['code'] ) ||
@@ -28,6 +87,27 @@ class github_api {
 			die ( 'Octocat is lost, and afraid' );
 		}
 
+		return $results;
+
+	}
+
+
+
+	/**
+	 * Get a repository from the GitHub API
+	 * @param  string $owner      The repository's owner
+	 * @param  string $repository The respository name
+	 * @return object             The response from the GitHub API
+	 */
+	public function get_repo ( $owner, $repository ) {
+
+		$this->log ( "get_repo ( $owner, $repository )", GEDEBUG_CALL );
+
+		$owner = trim ( $owner, '/' );
+		$repository = trim ( $repository, '/' );
+
+		$results = $this->call_api ( "https://api.github.com/repos/$owner/$repository" );
+
 		return json_decode ( $results['body'] );
 
 	}
@@ -42,18 +122,12 @@ class github_api {
 	 */
 	public function get_repo_commits ( $owner, $repository ) {
 
+		$this->log ( "get_repo_commits ( $owner, $repository )", GEDEBUG_CALL );
+
 		$owner = trim ( $owner, '/' );
 		$repository = trim ( $repository, '/' );
 
-		$results = wp_remote_get( "https://api.github.com/repos/$owner/$repository/commits", $args = array (
-			'user-agent' => 'WordPress Github oEmbed plugin - https://github.com/leewillis77/wp-github-oembed' ) );
-
-		if ( is_wp_error( $results ) ||
-		    ! isset ( $results['response']['code'] ) ||
-		    $results['response']['code'] != '200' ) {
-			header ( 'HTTP/1.0 404 Not Found' );
-			die ( 'Octocat is lost, and afraid' );
-		}
+		$results = $this->call_api ( "https://api.github.com/repos/$owner/$repository/commits" );
 
 		return json_decode ( $results['body'] );
 
@@ -70,18 +144,27 @@ class github_api {
 	 */
 	public function get_repo_milestone_summary ( $owner, $repository, $milestone ) {
 
+		$this->log ( "get_repo_milestone_summary ( $owner, $repository, $milestone )", GEDEBUG_CALL );
+
 		$owner = trim ( $owner, '/' );
 		$repo = trim ( $repo, '/' );
 
-		$results = wp_remote_get( "https://api.github.com/repos/$owner/$repository/milestones/$milestone", $args = array (
-			'user-agent' => 'WordPress Github oEmbed plugin - https://github.com/leewillis77/wp-github-oembed' ) );
+		$results = $this->call_api ( "https://api.github.com/repos/$owner/$repository/milestones/$milestone" );
 
-		if ( is_wp_error( $results ) ||
-		    ! isset ( $results['response']['code'] ) ||
-		    $results['response']['code'] != '200' ) {
-			header ( 'HTTP/1.0 404 Not Found' );
-			die ( 'Octocat is lost, and afraid' );
-		}
+		return json_decode ( $results['body'] );
+
+	}
+
+
+
+	public function get_repo_contributors ( $owner, $repository ) {
+
+		$this->log ( "get_repo_contributors ( $owner, $repository )", GEDEBUG_CALL );
+
+		$owner = trim ( $owner, '/' );
+		$repo = trim ( $repo, '/' );
+
+		$results = $this->call_api( "https://api.github.com/repos/$owner/$repository/collaborators" );
 
 		return json_decode ( $results['body'] );
 
@@ -96,21 +179,25 @@ class github_api {
 	 */
 	public function get_user ( $user ) {
 
+		$this->log ( "get_user ( $user )", GEDEBUG_CALL );
+
 		$user = trim ( $user, '/' );
 		$repository = trim ( $repository, '/' );
 
-		$results = wp_remote_get( "https://api.github.com/users/$user", $args = array (
-		              'user-agent' => 'WordPress Github oEmbed plugin - https://github.com/leewillis77/wp-github-oembed' ) );
-
-		if ( is_wp_error( $results ) ||
-		    ! isset ( $results['response']['code'] ) ||
-		    $results['response']['code'] != '200' ) {
-			header ( 'HTTP/1.0 404 Not Found' );
-			die ( 'Octocat is lost, and afraid' );
-		}
+		$results = $this->call_api ( "https://api.github.com/users/$user" );
 
 		return json_decode ( $results['body'] );
 
 	}
 	
+
+
+	private function log ( $msg, $level ) {
+		if ( GITHUB_API_LEVEL >= $level ) {
+			error_log ( "[GE$level]: ".$msg );
+		}
+	}
+
+
+
 }
\ No newline at end of file
diff --git a/github-embed.php b/github-embed.php
index 2a1d547..e0c6ef4 100644
--- a/github-embed.php
+++ b/github-embed.php
@@ -155,7 +155,11 @@ class github_embed {
 		}
 
 		// Issues / Milestones
-		if ( preg_match ( '#https?://github.com/([^/]*)/([^/]*)/issues.*$#i', $url, $matches ) && ! empty ( $matches[2] ) ) {
+		if ( preg_match ( '#https?://github.com/([^/]*)/([^/]*)/graphs/contributors/?$#i', $url, $matches ) && ! empty ( $matches[2] ) ) {
+
+			$this->oembed_github_repo_contributors ( $matches[1], $matches[2] );
+
+		} elseif ( preg_match ( '#https?://github.com/([^/]*)/([^/]*)/issues.*$#i', $url, $matches ) && ! empty ( $matches[2] ) ) {
 
 			if ( preg_match ( '#issues.?milestone=([0-9]*)#i', $url, $milestones ) ) {
 				$milestone = $milestones[1];
@@ -182,6 +186,52 @@ class github_embed {
 	}
 
 
+
+	private function oembed_github_repo_contributors ( $owner, $repository ) {
+
+	
+		$repo = $this->api->get_repo ( $owner, $repository );
+		$contributors = $this->api->get_repo_contributors ( $owner, $repository );
+
+		$response = new stdClass();
+		$response->type = 'rich';
+		$response->width = '10';
+		$response->height = '10';
+		$response->version = '1.0';
+		$response->title = $repo->description;
+
+		$gravatar_size = apply_filters ( 'github_oembed_gravatar_size', 64 );
+
+		// @TODO This should all be templated
+		$response->html = '<div class="github-embed github-embed-milestone-summary">';
+		$response->html .= '<p><a href="'.esc_attr($repo->html_url).'" target="_blank"><strong>'.esc_html($repo->description)."</strong></a><br/>";
+		
+		$response->html .= '<span class="github-heading">Contributors: </span>';
+
+		$response->html .= '<ul class="github-repo-contributors">';
+		
+		foreach ( $contributors as $contributor ) {
+
+			$details = $this->api->get_user ($contributor->login);
+			$response->html .= '<li class="github-repo-contributor">';
+			$response->html .= '<img class="github-repo-contributor-avatar" src="';
+			$response->html .= esc_url(add_query_arg(array('s'=>$gravatar_size), $contributor->avatar_url));
+			$response->html .= '" alt="Picture of '.esc_attr($contributor->login).'">';
+			if ( ! empty ( $details->name ) ) {
+				$response->html .= '<span class="github-repo-contributor-name">'.esc_html($details->name)."</span><br>";
+			}
+			$response->html .= '<span class="github-repo-contributor-login">';
+			$response->html .= '<a href="https://github.com/'.esc_attr($contributor->login).'">'.esc_attr($contributor->login).'</a></span>';
+		}
+
+		$response->html .= '</ul>';
+		$response->html .= '</div>';
+
+		header ( 'Content-Type: application/json' );
+		echo json_encode ( $response );
+		die();
+
+	}
 	/**
 	 * Retrieve the summary information for a repo's milestone, and
 	 * output it as an oembed response