diff --git a/FEDERATION.md b/FEDERATION.md
index 078fef4..831d5af 100644
--- a/FEDERATION.md
+++ b/FEDERATION.md
@@ -14,6 +14,7 @@ The WordPress plugin largely follows ActivityPub's server-to-server specificatio
 - [FEP-f1d5: NodeInfo in Fediverse Software](https://codeberg.org/fediverse/fep/src/branch/main/fep/f1d5/fep-f1d5.md)
 - [FEP-67ff: FEDERATION.md](https://codeberg.org/fediverse/fep/src/branch/main/fep/67ff/fep-67ff.md)
 - [FEP-5feb: Search indexing consent for actors](https://codeberg.org/fediverse/fep/src/branch/main/fep/5feb/fep-5feb.md)
+- [FEP-2677: Identifying the Application Actor](https://codeberg.org/fediverse/fep/src/branch/main/fep/2677/fep-2677.md)
 
 Partially supported FEPs
 
diff --git a/README.md b/README.md
index 73223e4..7947c21 100644
--- a/README.md
+++ b/README.md
@@ -112,6 +112,7 @@ Project maintained on GitHub at [automattic/wordpress-activitypub](https://githu
 * Added: URL support for WebFinger
 * Added: Make Post-Template filterable
 * Added: CSS class for ActivityPub comments to allow custom designs
+* Added: FEP-2677: Identifying the Application Actor
 * Improved: WebFinger endpoints
 
 ### 1.3.0 ###
diff --git a/includes/rest/class-nodeinfo.php b/includes/rest/class-nodeinfo.php
index 62151ff..7f1f094 100644
--- a/includes/rest/class-nodeinfo.php
+++ b/includes/rest/class-nodeinfo.php
@@ -169,6 +169,10 @@ class Nodeinfo {
 				'rel' => 'http://nodeinfo.diaspora.software/ns/schema/2.0',
 				'href' => get_rest_url_by_path( 'nodeinfo' ),
 			),
+			array(
+				'rel' => 'https://www.w3.org/ns/activitystreams#Application',
+				'href' => get_rest_url_by_path( 'application' ),
+			),
 		);
 
 		return new \WP_REST_Response( $discovery, 200 );
diff --git a/integration/class-nodeinfo.php b/integration/class-nodeinfo.php
index dea6c67..59492c1 100644
--- a/integration/class-nodeinfo.php
+++ b/integration/class-nodeinfo.php
@@ -3,6 +3,7 @@ namespace Activitypub\Integration;
 
 use function Activitypub\get_total_users;
 use function Activitypub\get_active_users;
+use function Activitypub\get_rest_url_by_path;
 
 /**
  * Compatibility with the NodeInfo plugin
@@ -14,8 +15,10 @@ class Nodeinfo {
 	 * Initialize the class, registering WordPress hooks
 	 */
 	public static function init() {
-		\add_filter( 'nodeinfo_data', array( self::class, 'add_nodeinfo_discovery' ), 10, 2 );
-		\add_filter( 'nodeinfo2_data', array( self::class, 'add_nodeinfo2_discovery' ), 10 );
+		\add_filter( 'nodeinfo_data', array( self::class, 'add_nodeinfo_data' ), 10, 2 );
+		\add_filter( 'nodeinfo2_data', array( self::class, 'add_nodeinfo2_data' ), 10 );
+
+		\add_filter( 'wellknown_nodeinfo_data', array( self::class, 'add_wellknown_nodeinfo_data' ), 10, 2 );
 	}
 
 	/**
@@ -26,7 +29,7 @@ class Nodeinfo {
 	 *
 	 * @return array The extended array
 	 */
-	public static function add_nodeinfo_discovery( $nodeinfo, $version ) {
+	public static function nodeinfo_data( $nodeinfo, $version ) {
 		if ( $version >= '2.0' ) {
 			$nodeinfo['protocols'][] = 'activitypub';
 		} else {
@@ -50,7 +53,7 @@ class Nodeinfo {
 	 *
 	 * @return array The extended array
 	 */
-	public static function add_nodeinfo2_discovery( $nodeinfo ) {
+	public static function nodeinfo2_data( $nodeinfo ) {
 		$nodeinfo['protocols'][] = 'activitypub';
 
 		$nodeinfo['usage']['users'] = array(
@@ -61,4 +64,20 @@ class Nodeinfo {
 
 		return $nodeinfo;
 	}
+
+	/**
+	 * Extend the well-known nodeinfo data
+	 *
+	 * @param array $data The well-known nodeinfo data
+	 *
+	 * @return array The extended array
+	 */
+	public static function add_wellknown_nodeinfo_data( $data ) {
+		$data['links'][] = array(
+			'rel' => 'https://www.w3.org/ns/activitystreams#Application',
+			'href' => get_rest_url_by_path( 'application' ),
+		);
+
+		return $data;
+	}
 }
diff --git a/readme.txt b/readme.txt
index e0797d2..c15b43f 100644
--- a/readme.txt
+++ b/readme.txt
@@ -112,6 +112,7 @@ Project maintained on GitHub at [automattic/wordpress-activitypub](https://githu
 * Added: URL support for WebFinger
 * Added: Make Post-Template filterable
 * Added: CSS class for ActivityPub comments to allow custom designs
+* Added: FEP-2677: Identifying the Application Actor
 * Improved: WebFinger endpoints
 
 = 1.3.0 =