diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..79207a4
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,22 @@
+# This file is for unifying the coding style for different editors and IDEs
+# editorconfig.org
+
+# WordPress Coding Standards
+# https://make.wordpress.org/core/handbook/coding-standards/
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = tab
+indent_size = 4
+
+[{.jshintrc,*.json,*.yml}]
+indent_style = space
+indent_size = 2
+
+[{*.txt,wp-config-sample.php}]
+end_of_line = crlf
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e6fe5be
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/node_modules/
+/vendor/
+package-lock.json
+composer.lock
diff --git a/Gruntfile.js b/Gruntfile.js
new file mode 100644
index 0000000..9807393
--- /dev/null
+++ b/Gruntfile.js
@@ -0,0 +1,66 @@
+module.exports = function(grunt) {
+  // Project configuration.
+  grunt.initConfig({
+    checktextdomain: {
+      options:{
+        text_domain: 'activitypub',
+        keywords: [
+          '__:1,2d',
+          '_e:1,2d',
+          '_x:1,2c,3d',
+          'esc_html__:1,2d',
+          'esc_html_e:1,2d',
+          'esc_html_x:1,2c,3d',
+          'esc_attr__:1,2d',
+          'esc_attr_e:1,2d',
+          'esc_attr_x:1,2c,3d',
+          '_ex:1,2c,3d',
+          '_n:1,2,4d',
+          '_nx:1,2,4c,5d',
+          '_n_noop:1,2,3d',
+          '_nx_noop:1,2,3c,4d'
+        ]
+      },
+      files: {
+        src:  [
+          '**/*.php',         // Include all files
+          'includes/*.php', // Include includes
+          '!sass/**',       // Exclude sass/
+          '!node_modules/**', // Exclude node_modules/
+          '!tests/**',        // Exclude tests/
+          '!vendor/**',       // Exclude vendor/
+          '!build/**',           // Exclude build/
+          '!static/**',   // Exclude static resources
+        ],
+        expand: true
+     }
+   },
+
+    wp_readme_to_markdown: {
+      target: {
+        files: {
+          'README.md': 'readme.txt'
+        },
+      },
+    },
+    makepot: {
+      target: {
+        options: {
+          mainFile: 'activitypub.php',
+          domainPath: '/languages',
+          exclude: ['bin/.*', '.git/.*', 'vendor/.*'],
+          potFilename: 'activitypub.pot',
+          type: 'wp-plugin',
+          updateTimestamp: true
+        }
+      }
+    }
+  });
+
+  grunt.loadNpmTasks('grunt-wp-readme-to-markdown');
+  grunt.loadNpmTasks('grunt-wp-i18n');
+  grunt.loadNpmTasks('grunt-checktextdomain');
+
+  // Default task(s).
+  grunt.registerTask('default', ['wp_readme_to_markdown', 'makepot', 'checktextdomain']);
+};
diff --git a/README.md b/README.md
index c28ffba..385e5d0 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,12 @@
-# wordpress-activitypub
\ No newline at end of file
+# ActivityPub #
+**Contributors:** [pfefferle](https://profiles.wordpress.org/pfefferle)  
+**Donate link:** https://notiz.blog/donate/  
+**Tags:** OStatus, fediverse, activitypub, activitystream  
+**Requires at least:** 4.7  
+**Tested up to:** 4.9.8  
+**Stable tag:** 1.0.0  
+**Requires PHP:** 5.3  
+**License:** MIT  
+**License URI:** http://opensource.org/licenses/MIT  
+
+The ActivityPub protocol is a decentralized social networking protocol based upon the ActivityStreams 2.0 data format.
diff --git a/activitypub.php b/activitypub.php
new file mode 100644
index 0000000..045ee39
--- /dev/null
+++ b/activitypub.php
@@ -0,0 +1,27 @@
+<?php
+/**
+ * Plugin Name: ActivityPub
+ * Plugin URI: https://github.com/pfefferle/wordpress-activitypub/
+ * Description: The ActivityPub protocol is a decentralized social networking protocol based upon the ActivityStreams 2.0 data format.
+ * Version: 1.0.0
+ * Author: Matthias Pfefferle
+ * Author URI: https://notiz.blog/
+ * License: MIT
+ * License URI: http://opensource.org/licenses/MIT
+ * Text Domain: activitypub
+ * Domain Path: /languages
+ */
+
+/**
+ * Initialize plugin
+ */
+function activitypub_init() {
+	require_once dirname( __FILE__ ) . '/includes/functions.php';
+
+	require_once dirname( __FILE__ ) . '/includes/class-activitypub.php';
+	add_filter( 'template_include', array( 'Activity_Pub', 'render_profile' ), 99 );
+	add_action( 'webfinger_user_data', array( 'Activity_Pub', 'add_webfinger_discovery' ), 10, 3 );
+	add_filter( 'query_vars', array( 'Activity_Pub', 'add_query_vars' ) );
+	add_action( 'init', array( 'Activity_Pub', 'add_rewrite_endpoint' ) );
+}
+add_action( 'plugins_loaded', 'activitypub_init' );
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..83ded6f
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,19 @@
+{
+    "name": "pfefferle/wordpress-activitypub",
+    "description": "The ActivityPub protocol is a decentralized social networking protocol based upon the ActivityStreams 2.0 data format.",
+    "type": "wordpress-plugin",
+    "require": {
+        "php": ">=5.3.0",
+        "composer/installers": "~1.0"
+    },
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Matthias Pfefferle",
+            "email": "pfefferle@gmail.com"
+        }
+    ],
+    "extra": {
+        "installer-name": "activitypub"
+    }
+}
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..c7d6b30
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,26 @@
+version: '2'
+services:
+  db:
+    image: mysql:5.7
+    restart: always
+    environment:
+      MYSQL_ROOT_PASSWORD: wordpress
+      MYSQL_DATABASE: wordpress
+      MYSQL_USER: wordpress
+      MYSQL_PASSWORD: wordpress
+
+  wordpress:
+    depends_on:
+      - db
+    image: wordpress:latest
+    links:
+      - db
+    ports:
+      - "8076:80"
+    volumes:
+      - .:/var/www/html/wp-content/plugins/activitypub
+    restart: always
+    environment:
+      WORDPRESS_DB_HOST: db:3306
+      WORDPRESS_DB_PASSWORD: wordpress
+      WORDPRESS_DEBUG: 1
diff --git a/includes/class-activitypub.php b/includes/class-activitypub.php
new file mode 100644
index 0000000..421bb7d
--- /dev/null
+++ b/includes/class-activitypub.php
@@ -0,0 +1,73 @@
+<?php
+
+class Activity_Pub {
+	public static function render_profile( $template ) {
+		if ( ! is_author() ) {
+			return $template;
+		}
+
+		$json_template = dirname( __FILE__ ) . '/../templates/author-profile.php';
+
+		global $wp_query;
+
+		if ( isset( $wp_query->query_vars['activitypub'] ) ) {
+			return $json_template;
+		}
+
+		if ( ! isset( $_SERVER['HTTP_ACCEPT'] ) ) {
+			return $template;
+		}
+
+		// interpret accept header
+		$pos = stripos( $_SERVER['HTTP_ACCEPT'], ';' );
+		if ( $pos ) {
+			$accept_header = substr( $_SERVER['HTTP_ACCEPT'], 0, $pos );
+		} else {
+			$accept_header = $_SERVER['HTTP_ACCEPT'];
+		}
+		// accept header as an array
+		$accept = explode( ',', trim( $accept_header ) );
+
+		if (
+			! in_array( 'application/activity+json', $accept, true ) &&
+			! in_array( 'application/ld+json', $accept, true )
+		) {
+			return $template;
+		}
+
+		return $json_template;
+	}
+
+	/**
+	 * Add WebFinger discovery links
+	 *
+	 * @param array   $array    the jrd array
+	 * @param string  $resource the WebFinger resource
+	 * @param WP_User $user     the WordPress user
+	 */
+	public static function add_webfinger_discovery( $array, $resource, $user ) {
+		$array['links'][] = array(
+			'rel'  => 'self',
+			'type' => 'aplication/activity+json',
+			'href' => get_author_posts_url( $user->ID ),
+		);
+
+		return $array;
+	}
+
+	/**
+	 * Add the 'photos' query variable so WordPress
+	 * won't mangle it.
+	 */
+	public static function add_query_vars( $vars ) {
+		$vars[] = 'activitypub';
+		return $vars;
+	}
+
+	/**
+	 * Add our rewrite endpoint to permalinks and pages.
+	 */
+	public static function add_rewrite_endpoint() {
+		add_rewrite_endpoint( 'activitypub', EP_AUTHORS );
+	}
+}
diff --git a/includes/functions.php b/includes/functions.php
new file mode 100644
index 0000000..e69de29
diff --git a/languages/activitypub.pot b/languages/activitypub.pot
new file mode 100644
index 0000000..6316a6b
--- /dev/null
+++ b/languages/activitypub.pot
@@ -0,0 +1,36 @@
+# Copyright (C) 2018 Matthias Pfefferle
+# This file is distributed under the MIT.
+msgid ""
+msgstr ""
+"Project-Id-Version: ActivityPub 1.0.0\n"
+"Report-Msgid-Bugs-To: https://wordpress.org/support/plugin/activitypub\n"
+"POT-Creation-Date: 2018-08-18 10:35:26+00:00\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=utf-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"PO-Revision-Date: 2018-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"X-Generator: grunt-wp-i18n1.0.2\n"
+
+#. Plugin Name of the plugin/theme
+msgid "ActivityPub"
+msgstr ""
+
+#. Plugin URI of the plugin/theme
+msgid "https://github.com/pfefferle/wordpress-activitypub/"
+msgstr ""
+
+#. Description of the plugin/theme
+msgid ""
+"The ActivityPub protocol is a decentralized social networking protocol "
+"based upon the ActivityStreams 2.0 data format."
+msgstr ""
+
+#. Author of the plugin/theme
+msgid "Matthias Pfefferle"
+msgstr ""
+
+#. Author URI of the plugin/theme
+msgid "https://notiz.blog/"
+msgstr ""
\ No newline at end of file
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..628b6f8
--- /dev/null
+++ b/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "activitypub",
+  "description": "The ActivityPub protocol is a decentralized social networking protocol based upon the ActivityStreams 2.0 data format.",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/pfefferle/wordpress-activitypub.git"
+  },
+  "author": {
+    "name": "Matthias Pfefferle",
+    "web": "https://notiz.blog"
+  },
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/pfefferle/wordpress-activitypub/issues"
+  },
+  "homepage": "https://github.com/pfefferle/wordpress-activitypub#readme",
+  "devDependencies": {
+    "grunt": "^1.0.3",
+    "grunt-checktextdomain": "^1.0.1",
+    "grunt-wp-i18n": "^1.0.2",
+    "grunt-wp-readme-to-markdown": "^2.0.1"
+  }
+}
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 0000000..d2e6a0f
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0"?>
+<ruleset name="WordPress ActivityPub">
+	<description>WordPress ActivityPub Standards</description>
+	<file>./activitypub.php</file>
+	<file>./includes/</file>
+	<config name="minimum_supported_wp_version" value="4.7"/>
+	<exclude-pattern>*/includes/*\.(inc|css|js|svg)</exclude-pattern>
+	<exclude-pattern>*/vendor/*</exclude-pattern>
+	<rule ref="PHPCompatibility"/>
+	<config name="testVersion" value="5.3-"/>
+	<rule ref="WordPress-Core" />
+	<rule ref="WordPress.Files.FileName">
+		<properties>
+			<property name="strict_class_file_names" value="false" />
+		</properties>
+	</rule>
+	<rule ref="WordPress.WP.DeprecatedFunctions" />
+	<rule ref="WordPress-Extra" />
+	<rule ref="WordPress.WP.I18n"/>
+	<config name="text_domain" value="activitypub,default"/>
+</ruleset>
diff --git a/readme.txt b/readme.txt
new file mode 100644
index 0000000..fb24cbf
--- /dev/null
+++ b/readme.txt
@@ -0,0 +1,12 @@
+=== ActivityPub ===
+Contributors: pfefferle
+Donate link: https://notiz.blog/donate/
+Tags: OStatus, fediverse, activitypub, activitystream
+Requires at least: 4.7
+Tested up to: 4.9.8
+Stable tag: 1.0.0
+Requires PHP: 5.3
+License: MIT
+License URI: http://opensource.org/licenses/MIT
+
+The ActivityPub protocol is a decentralized social networking protocol based upon the ActivityStreams 2.0 data format.
diff --git a/templates/author-profile.php b/templates/author-profile.php
new file mode 100644
index 0000000..c100aa0
--- /dev/null
+++ b/templates/author-profile.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Activity Streams 1 Feed Template for displaying AS1 Posts feed.
+ *
+ * @link https://github.com/pento/7B a lot of changes made by @pento
+ */
+
+$author_id = get_the_author_meta( 'ID' );
+
+$json = new stdClass();
+
+$json->{'@context'} = array(
+	'https://www.w3.org/ns/activitystreams',
+	'https://w3id.org/security/v1',
+);
+
+$json->id                = get_author_posts_url( $author_id );
+$json->type              = 'Person';
+$json->name              = get_the_author_meta( 'display_name', $author_id );
+$json->summary           = get_the_author_meta( 'description', $author_id );
+$json->preferredUsername = get_the_author();
+$json->url               = get_author_posts_url( $author_id );
+$json->icon              = array(
+	'type' => 'Image',
+	'url'  => get_avatar_url( $author_id, array( 'size' => 120 ) ),
+);
+
+if ( has_header_image() ) {
+	$json->image = array(
+		'type' => 'Image',
+		'url'  => get_header_image(),
+	);
+}
+
+if ( method_exists( 'Magic_Sig', 'get_public_key' ) ) {
+	$json->publicKey = array(
+		'id'           => get_author_posts_url( $author_id ) . '#key',
+		'owner'        => get_author_posts_url( $author_id ),
+		'publicKeyPem' => Magic_Sig::get_public_key( $author_id ),
+	);
+}
+
+header( 'Content-Type: application/activity-json', true );
+
+// filter output
+$json = apply_filters( 'activitypub_profile_array', $json );
+
+/*
+ * Action triggerd prior to the ActivityPub profile being created and sent to the client
+ */
+do_action( 'activitypub_profile_pre' );
+
+$options = 0;
+// JSON_PRETTY_PRINT added in PHP 5.4
+if ( get_query_var( 'pretty' ) ) {
+	$options |= JSON_PRETTY_PRINT;
+}
+
+/*
+ * Options to be passed to json_encode()
+ *
+ * @param int $options The current options flags
+ */
+$options = apply_filters( 'activitypub_profile_options', $options );
+echo wp_json_encode( $json, $options );
+
+/*
+ * Action triggerd after the ActivityPub profile has been created and sent to the client
+ */
+do_action( 'activitypub_profile_post' );