diff --git a/Gemfile b/Gemfile
index 9c50e322..972560b4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -39,7 +39,7 @@ gem 'commonmarker'
 gem 'devise'
 gem 'devise-i18n'
 gem 'devise_invitable'
-gem 'distributed-press-api-client', '~> 0.2.3'
+gem 'distributed-press-api-client', '~> 0.3.0rc0'
 gem 'njalla-api-client', '~> 0.2.0'
 gem 'email_address', git: 'https://github.com/fauno/email_address', branch: 'i18n'
 gem 'exception_notification'
diff --git a/Gemfile.lock b/Gemfile.lock
index 84ee0b5e..39394a8c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -154,7 +154,7 @@ GEM
     devise_invitable (2.0.8)
       actionmailer (>= 5.0)
       devise (>= 4.6)
-    distributed-press-api-client (0.2.4)
+    distributed-press-api-client (0.3.0rc0)
       addressable (~> 2.3, >= 2.3.0)
       climate_control
       dry-schema
@@ -600,7 +600,7 @@ DEPENDENCIES
   devise
   devise-i18n
   devise_invitable
-  distributed-press-api-client (~> 0.2.3)
+  distributed-press-api-client (~> 0.3.0rc0)
   dotenv-rails
   down
   ed25519
diff --git a/app/controllers/build_stats_controller.rb b/app/controllers/build_stats_controller.rb
index 31a4c5d6..339f17f0 100644
--- a/app/controllers/build_stats_controller.rb
+++ b/app/controllers/build_stats_controller.rb
@@ -22,7 +22,12 @@ class BuildStatsController < ApplicationController
 
     @table = site.deployment_list.map do |deploy|
       type = deploy.class.name.underscore
-      urls = deploy.respond_to?(:urls) ? deploy.urls : [deploy.url].compact
+      urls = deploy.urls.map do |url|
+        URI.parse(url)
+      rescue URI::Error
+        nil
+      end.compact
+
       urls = [nil] if urls.empty?
       build_stat = deploy.build_stats.where(status: true).last
       seconds = build_stat&.seconds || 0
diff --git a/app/jobs/deploy_job.rb b/app/jobs/deploy_job.rb
index a5cda360..291991c7 100644
--- a/app/jobs/deploy_job.rb
+++ b/app/jobs/deploy_job.rb
@@ -51,7 +51,11 @@ class DeployJob < ApplicationJob
           status = d.deploy(output: @output)
           seconds = d.build_stats.last.try(:seconds) || 0
           size = d.size
-          urls = d.respond_to?(:urls) ? d.urls : [d.url].compact
+          urls = d.urls.map do |url|
+            URI.parse url
+          rescue URI::Error
+            nil
+          end.compact
         rescue StandardError => e
           status = false
           seconds ||= 0
diff --git a/app/mailers/deploy_mailer.rb b/app/mailers/deploy_mailer.rb
index b7b464cb..37748b42 100644
--- a/app/mailers/deploy_mailer.rb
+++ b/app/mailers/deploy_mailer.rb
@@ -52,7 +52,7 @@ class DeployMailer < ApplicationMailer
             t << (row.map do |k, v|
               case k
               when :seconds then v[:human]
-              when :urls then url
+              when :urls then url.to_s
               else v
               end
             end)
diff --git a/app/models/deploy.rb b/app/models/deploy.rb
index 515a8530..1f087eb3 100644
--- a/app/models/deploy.rb
+++ b/app/models/deploy.rb
@@ -23,6 +23,11 @@ class Deploy < ApplicationRecord
     raise NotImplementedError
   end
 
+  # @return [Array]
+  def urls
+    [url].compact
+  end
+
   def limit
     raise NotImplementedError
   end
@@ -55,6 +60,22 @@ class Deploy < ApplicationRecord
     @gems_dir ||= Rails.root.join('_storage', 'gems', site.name)
   end
 
+  # Un entorno que solo tiene lo que necesitamos
+  #
+  # @return [Hash]
+  def env
+    # XXX: This doesn't support Windows paths :B
+    paths = [File.dirname(`which bundle`), '/usr/local/bin', '/usr/bin', '/bin']
+
+    # Las variables de entorno extra no pueden superponerse al local.
+    extra_env.merge({
+                      'HOME' => home_dir,
+                      'PATH' => paths.join(':'),
+                      'JEKYLL_ENV' => Rails.env,
+                      'LANG' => ENV['LANG'],
+                    })
+  end
+
   # Corre un comando, lo registra en la base de datos y devuelve el
   # estado.
   #
@@ -98,6 +119,11 @@ class Deploy < ApplicationRecord
     @local_env ||= {}
   end
 
+  # Devuelve opciones para jekyll build
+  #
+  # @return [String,nil]
+  def flags_for_build(**args); end
+
   # Trae todas las dependencias
   #
   # @return [Array]
@@ -107,6 +133,21 @@ class Deploy < ApplicationRecord
 
   private
 
+  # Escribe el contenido en un archivo temporal y ejecuta el bloque
+  # provisto con el archivo como parámetro
+  #
+  # @param :content [String]
+  def with_tempfile(content, &block)
+    Tempfile.create(SecureRandom.hex) do |file|
+      file.write content.to_s
+      file.rewind
+      file.close
+
+      # @yieldparam :file [File]
+      yield file
+    end
+  end
+
   # @param [String]
   # @return [String]
   def readable_cmd(cmd)
@@ -117,7 +158,14 @@ class Deploy < ApplicationRecord
     @deploy_local ||= site.deploys.find_by(type: 'DeployLocal')
   end
 
-  def non_local_deploys
-    @non_local_deploys ||= site.deploys.where.not(type: 'DeployLocal')
+  # Consigue todas las variables de entorno configuradas por otros
+  # deploys.
+  #
+  # @return [Hash]
+  def extra_env
+    @extra_env ||=
+      site.deployment_list.reduce({}) do |extra, deploy|
+        extra.merge deploy.local_env
+      end
   end
 end
diff --git a/app/models/deploy_local.rb b/app/models/deploy_local.rb
index 75ea8b1c..0bb3958f 100644
--- a/app/models/deploy_local.rb
+++ b/app/models/deploy_local.rb
@@ -62,34 +62,26 @@ class DeployLocal < Deploy
     FileUtils.rm_rf(File.join(site.path, '.jekyll-cache'))
   end
 
+  # Opciones necesarias para la compilación del sitio
+  #
+  # @return [Hash]
+  def local_env
+    @local_env ||= {
+      'SPREE_API_KEY' => site.tienda_api_key,
+      'SPREE_URL' => site.tienda_url,
+      'AIRBRAKE_PROJECT_ID' => site.id.to_s,
+      'AIRBRAKE_PROJECT_KEY' => site.airbrake_api_key,
+      'YARN_CACHE_FOLDER' => yarn_cache_dir,
+      'GEMS_SOURCE' => ENV['GEMS_SOURCE']
+    }
+  end
+
   private
 
   def mkdir
     FileUtils.mkdir_p destination
   end
 
-  # Un entorno que solo tiene lo que necesitamos
-  #
-  # @return [Hash]
-  def env
-    # XXX: This doesn't support Windows paths :B
-    paths = [File.dirname(`which bundle`), '/usr/local/bin', '/usr/bin', '/bin']
-
-    # Las variables de entorno extra no pueden superponerse al local.
-    extra_env.merge({
-                      'HOME' => home_dir,
-                      'PATH' => paths.join(':'),
-                      'SPREE_API_KEY' => site.tienda_api_key,
-                      'SPREE_URL' => site.tienda_url,
-                      'AIRBRAKE_PROJECT_ID' => site.id.to_s,
-                      'AIRBRAKE_PROJECT_KEY' => site.airbrake_api_key,
-                      'JEKYLL_ENV' => Rails.env,
-                      'LANG' => ENV['LANG'],
-                      'YARN_CACHE_FOLDER' => yarn_cache_dir,
-                      'GEMS_SOURCE' => ENV['GEMS_SOURCE']
-                    })
-  end
-
   def yarn_cache_dir
     Rails.root.join('_yarn_cache').to_s
   end
@@ -142,7 +134,11 @@ class DeployLocal < Deploy
   end
 
   def jekyll_build(output: false)
-    run %(bundle exec jekyll build --trace --profile --destination "#{escaped_destination}"), output: output
+    with_tempfile(site.private_key_pem) do |file|
+      flags = extra_flags(private_key: file)
+
+      run %(bundle exec jekyll build --trace --profile #{flags} --destination "#{escaped_destination}"), output: output
+    end
   end
 
   # no debería haber espacios ni caracteres especiales, pero por si
@@ -156,17 +152,13 @@ class DeployLocal < Deploy
     FileUtils.rm_rf destination
   end
 
-  # Consigue todas las variables de entorno configuradas por otros
-  # deploys.
+  # Genera opciones extra desde los otros deploys
   #
-  # @deprecated Solo tenía sentido para Distributed Press v0
-  # @return [Hash]
-  def extra_env
-    @extra_env ||=
-      non_local_deploys.reduce({}) do |extra_env, deploy|
-        extra_env.tap do |e|
-          e.merge! deploy.local_env
-        end
-      end
+  # @param :args [Hash]
+  # @return [String]
+  def extra_flags(**args)
+    site.deployment_list.map do |deploy|
+      deploy.flags_for_build(**args)
+    end.compact.join(' ')
   end
 end
diff --git a/app/models/deploy_social_distributed_press.rb b/app/models/deploy_social_distributed_press.rb
new file mode 100644
index 00000000..db555ab7
--- /dev/null
+++ b/app/models/deploy_social_distributed_press.rb
@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require 'distributed_press/v1/social/client'
+
+# Publicar novedades al Fediverso
+class DeploySocialDistributedPress < Deploy
+  # Solo luego de publicar remotamente
+  DEPENDENCIES = %i[deploy_distributed_press deploy_rsync deploy_full_rsync]
+
+  # Envía las notificaciones
+  def deploy(output: false)
+    with_tempfile(site.private_key_pem) do |file|
+      key = Shellwords.escape file.path
+      dest = Shellwords.escape destination
+
+      run %(bundle exec jekyll notify --trace --key #{key} --destination "#{dest}"), output: output
+    end
+  end
+
+  # Igual que DeployLocal
+  #
+  # @return [String]
+  def destination
+    File.join(Rails.root, '_deploy', site.hostname)
+  end
+
+  # Solo uno
+  #
+  # @return [Integer]
+  def limit
+    1
+  end
+
+  # Espacio ocupado, pero no podemos calcularlo
+  #
+  # @return [Integer]
+  def size
+    0
+  end
+
+  # El perfil de actor
+  #
+  # @return [String,nil]
+  def url
+    site.data.dig('activity_pub', 'actor')
+  end
+
+  # Genera la opción de llave privada para jekyll build
+  #
+  # @params :args [Hash]
+  # @return [String]
+  def flags_for_build(**args)
+    "--key #{Shellwords.escape args[:private_key].path}"
+  end
+end
diff --git a/app/models/metadata_boolean.rb b/app/models/metadata_boolean.rb
index 90c002a7..9932c6fd 100644
--- a/app/models/metadata_boolean.rb
+++ b/app/models/metadata_boolean.rb
@@ -4,8 +4,12 @@
 #
 # Esto es increíblemente difícil de lograr que salga bien!
 class MetadataBoolean < MetadataTemplate
+  # El valor por defecto es una versión booleana de lo que diga (o no
+  # diga) el esquema
+  #
+  # @return [Boolean]
   def default_value
-    false
+    !!super
   end
 
   # Los checkboxes son especiales porque la especificación de HTML
diff --git a/app/models/metadata_created_at.rb b/app/models/metadata_created_at.rb
new file mode 100644
index 00000000..d31b3a1c
--- /dev/null
+++ b/app/models/metadata_created_at.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+# Fecha y hora de creación
+class MetadataCreatedAt < MetadataTemplate
+  # Por defecto la hora actual, pero por retrocompatibilidad, queremos
+  # la fecha de publicación
+  def default_value
+    if post.date.value.to_date < Time.now.to_date
+      post.date.value
+    else
+      Time.now
+    end
+  end
+
+  # Nunca cambia
+  def value=(new_value)
+    value
+  end
+end
diff --git a/app/models/post.rb b/app/models/post.rb
index 5cc1c5ea..fab9ab06 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -12,7 +12,7 @@ class Post
   DEFAULT_ATTRIBUTES = %i[site document layout].freeze
   # Otros atributos que no vienen en los metadatos
   PRIVATE_ATTRIBUTES = %i[path slug attributes errors].freeze
-  PUBLIC_ATTRIBUTES = %i[lang date uuid].freeze
+  PUBLIC_ATTRIBUTES = %i[lang date uuid created_at].freeze
   ATTR_SUFFIXES = %w[? =].freeze
 
   attr_reader :attributes, :errors, :layout, :site, :document
@@ -217,6 +217,11 @@ class Post
                                           post: self, required: true)
   end
 
+  # La fecha de creación inmodificable del post
+  def created_at
+    @metadata[:created_at] ||= MetadataCreatedAt.new(document: document, site: site, layout: layout, name: :created_at, type: :created_at, post: self, required: true)
+  end
+
   # Detecta si es un atributo válido o no, a partir de la tabla de la
   # plantilla
   def attribute?(mid)
@@ -267,6 +272,7 @@ class Post
     # Y que no se procese liquid
     yaml['liquid'] = false
     yaml['usuaries'] = usuaries.map(&:id).uniq
+    yaml['created_at'] = created_at.value
     yaml['last_modified_at'] = modified_at
 
     "#{yaml.to_yaml}---\n\n#{body}"
diff --git a/app/models/site.rb b/app/models/site.rb
index e4e9799c..a8c5e376 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -10,6 +10,7 @@ class Site < ApplicationRecord
   include Site::DeployDependencies
   include Site::BuildStats
   include Site::LayoutOrdering
+  include Site::SocialDistributedPress
   include Tienda
 
   # Cifrar la llave privada que cifra y decifra campos ocultos.  Sutty
@@ -18,10 +19,6 @@ class Site < ApplicationRecord
   # protege de acceso al panel de Sutty!
   encrypts :private_key
 
-  # TODO: Hacer que los diferentes tipos de deploy se auto registren
-  # @see app/services/site_service.rb
-  DEPLOYS = %i[local private www zip hidden_service distributed_press].freeze
-
   validates :name, uniqueness: true, hostname: {
     allow_root_label: true
   }
diff --git a/app/models/site/social_distributed_press.rb b/app/models/site/social_distributed_press.rb
new file mode 100644
index 00000000..5d469f03
--- /dev/null
+++ b/app/models/site/social_distributed_press.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class Site
+  # Agrega soporte para Social Distributed Press en los sitios
+  module SocialDistributedPress
+    extend ActiveSupport::Concern
+
+    included do
+      encrypts :private_key_pem
+
+      before_save :generate_private_key_pem!, unless: :private_key_pem?
+
+      private
+
+      # Genera la llave privada y la almacena
+      #
+      # @return [nil]
+      def generate_private_key_pem!
+        self.private_key_pem ||= DistributedPress::V1::Social::Client.new(public_key_url: nil, key_size: 2048).private_key.export
+      end
+    end
+  end
+end
diff --git a/app/services/site_service.rb b/app/services/site_service.rb
index 5ed44b11..7022244c 100644
--- a/app/services/site_service.rb
+++ b/app/services/site_service.rb
@@ -54,9 +54,8 @@ SiteService = Struct.new(:site, :usuarie, :params, keyword_init: true) do
 
   # Genera los Deploy necesarios para el sitio a menos que ya los tenga.
   def build_deploys
-    Site::DEPLOYS.map { |deploy| "Deploy#{deploy.to_s.camelcase}" }
-                 .each do |deploy|
-      next if site.deploys.find_by type: deploy
+    Deploy.subclasses.each do |deploy|
+      next if site.deploys.find_by type: deploy.name
 
       site.deploys.build type: deploy
     end
diff --git a/app/views/build_stats/index.haml b/app/views/build_stats/index.haml
index 27c063f9..de04d84d 100644
--- a/app/views/build_stats/index.haml
+++ b/app/views/build_stats/index.haml
@@ -14,7 +14,7 @@
           - row[:urls].each do |url|
             %tr
               %th{ scope: 'row' }= row[:title]
-              %td= link_to_if url.present?, url, url, class: 'word-break-all'
+              %td= link_to_if (url.present? && url.scheme.present?), url.to_s, url.to_s, class: 'word-break-all'
               %td
                 %time{ datetime: row[:seconds][:machine] }= row[:seconds][:human]
               %td= row[:size]
diff --git a/app/views/deploy_mailer/deployed.html.haml b/app/views/deploy_mailer/deployed.html.haml
index f5afe5de..762bf4db 100644
--- a/app/views/deploy_mailer/deployed.html.haml
+++ b/app/views/deploy_mailer/deployed.html.haml
@@ -13,7 +13,7 @@
         %tr
           %td= row[:title]
           %td= row[:status]
-          %td= link_to_if url.present?, url, url
+          %td= link_to_if (url.present? && url.scheme.present?), url.to_s, url.to_s
           %td
             %time{ datetime: row[:seconds][:machine] }= row[:seconds][:human]
           %td= row[:size]
diff --git a/app/views/deploys/_deploy_social_distributed_press.haml b/app/views/deploys/_deploy_social_distributed_press.haml
new file mode 100644
index 00000000..5c73b262
--- /dev/null
+++ b/app/views/deploys/_deploy_social_distributed_press.haml
@@ -0,0 +1,21 @@
+-# Publicar a la web distribuida
+
+.row
+  .col
+    = deploy.hidden_field :id
+    = deploy.hidden_field :type
+    .custom-control.custom-switch
+      -#
+        El checkbox invierte la lógica de destrucción porque queremos
+        crear el deploy si está activado y destruirlo si está
+        desactivado.
+      = deploy.check_box :_destroy,
+        { checked: deploy.object.persisted?, class: 'custom-control-input' },
+        '0', '1'
+      = deploy.label :_destroy, class: 'custom-control-label' do
+        %h3= t('.title')
+    = sanitize_markdown t('.help'),
+      tags: %w[p strong em a]
+
+
+%hr/
diff --git a/app/views/posts/attribute_ro/_created_at.haml b/app/views/posts/attribute_ro/_created_at.haml
new file mode 100644
index 00000000..04f6d716
--- /dev/null
+++ b/app/views/posts/attribute_ro/_created_at.haml
@@ -0,0 +1,4 @@
+%tr{ id: attribute }
+  %th= post_label_t(attribute, post: post)
+  %td{ dir: dir, lang: locale }
+    %time{ datetime: metadata.value.xmlschema }= l metadata.value
diff --git a/app/views/posts/attributes/_created_at.haml b/app/views/posts/attributes/_created_at.haml
new file mode 100644
index 00000000..0aab9802
--- /dev/null
+++ b/app/views/posts/attributes/_created_at.haml
@@ -0,0 +1 @@
+-# nada
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 5f97a8b9..5c00701c 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -123,6 +123,10 @@ en:
         title: Distributed Web
         success: Success!
         error: Error
+      deploy_social_distributed_press:
+        title: Fediverse
+        success: Success!
+        error: Error
       deploy_reindex:
         title: Reindex
         success: Success!
@@ -307,6 +311,14 @@ en:
         indefinitely.
 
         [Learn more](https://sutty.nl/learn-more-about-publish-to-dweb-functionality/)
+    deploy_social_distributed_press:
+      title: 'Publish on the Fediverse'
+      help: |
+        By using the ActivityPub protocol, people on the Fediverse
+        ([Mastodon](https://joinmastodon.org/servers),
+        [Pixelfed](https://pixelfed.social/site/about), and
+        [others](https://fediverse.party/)) can follow your site,
+        receive news and interact with them.
   stats:
     index:
       title: Statistics
@@ -512,6 +524,8 @@ en:
         feedback: 'This field cannot be empty!'
       uuid:
         label: 'Unique identifier'
+      created_at:
+        label: 'Created at'
       geo:
         uri: 'Open in app'
         osm: 'Open in web map'
diff --git a/config/locales/es.yml b/config/locales/es.yml
index 9e0b8945..0ff7e1c8 100644
--- a/config/locales/es.yml
+++ b/config/locales/es.yml
@@ -123,6 +123,10 @@ es:
         title: Web distribuida
         success: ¡Éxito!
         error: Hubo un error
+      deploy_social_distributed_press:
+        title: Fediverso
+        success: ¡Éxito!
+        error: Hubo un error
       deploy_reindex:
         title: Reindexación
         success: ¡Éxito!
@@ -312,6 +316,14 @@ es:
         copias de tu contenido indefinidamente.
 
         [Saber más](https://sutty.nl/saber-mas-sobre-publicar-a-la-web-distribuida/)
+    deploy_social_distributed_press:
+      title: 'Publicar al Fediverso'
+      help: |
+        Utilizando el protocolo ActivityPub, otras personas en el
+        Fediverso ([Mastodon](https://joinmastodon.org/servers),
+        [Pixelfed](https://pixelfed.social/site/about) y
+        [otros](https://fediverse.party/)) pueden seguir a tu sitio,
+        recibir novedades e interactuar con ellas.
   stats:
     index:
       title: Estadísticas
@@ -520,6 +532,8 @@ es:
         feedback: '¡Este campo no puede estar vacío!'
       uuid:
         label: 'Identificador único'
+      created_at:
+        label: 'Fecha de creación'
       geo:
         uri: 'Abrir en aplicación'
         osm: 'Abrir en mapa web'
diff --git a/db/migrate/20230829204127_add_private_key_pem_ciphertext_to_sites.rb b/db/migrate/20230829204127_add_private_key_pem_ciphertext_to_sites.rb
new file mode 100644
index 00000000..9f26f21a
--- /dev/null
+++ b/db/migrate/20230829204127_add_private_key_pem_ciphertext_to_sites.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+# Almacena las llaves privadas de cada sitio
+class AddPrivateKeyPemCiphertextToSites < ActiveRecord::Migration[6.1]
+  # Agrega la columna cifrada
+  def change
+    add_column :sites, :private_key_pem_ciphertext, :text
+  end
+end