diff --git a/app/controllers/departments_controller.rb b/app/controllers/departments_controller.rb
index e6f2ea9..dc85c97 100644
--- a/app/controllers/departments_controller.rb
+++ b/app/controllers/departments_controller.rb
@@ -10,12 +10,16 @@ def index
 
   # GET /departments/1
   def show
-    render json: @department
   end
 
   private
     # Use callbacks to share common setup or constraints between actions.
     def set_department
-      @department = Department.find(params.expect(:id))
+      id = params.expect(:id)
+      if id.match(/[0-9]/)
+        @department = Department.find(id)
+      else
+        @department = Department.find_by(slug: id)
+      end
     end
 end
diff --git a/app/controllers/promises_controller.rb b/app/controllers/promises_controller.rb
index d5b73f7..92da07a 100644
--- a/app/controllers/promises_controller.rb
+++ b/app/controllers/promises_controller.rb
@@ -6,6 +6,5 @@ def index
 
   def show
     @promise = Promise.find(params[:id])
-    render json: @promise
   end
 end
diff --git a/app/models/department.rb b/app/models/department.rb
index 00c9e52..a864c96 100644
--- a/app/models/department.rb
+++ b/app/models/department.rb
@@ -1,6 +1,8 @@
 class Department < ApplicationRecord
   belongs_to :government
-  has_many :ministers
+  has_many :officials, class_name: "Minister", dependent: :destroy
+  has_one :minister, -> { where(role: "Minister") }, class_name: "Minister"
+
 
   has_many :department_promises, dependent: :destroy
   has_many :promises, through: :department_promises
diff --git a/app/views/departments/show.json.jbuilder b/app/views/departments/show.json.jbuilder
new file mode 100644
index 0000000..44dfbd2
--- /dev/null
+++ b/app/views/departments/show.json.jbuilder
@@ -0,0 +1,14 @@
+
+json.(@department, :slug, :display_name, :official_name, :priority)
+
+json.minister do
+  if @department.minister.present?
+    json.partial! @department.minister, as: :minister
+  else
+    json.null!
+  end
+end
+
+json.promises do
+  json.partial! "promises/promise_listing", collection: @department.lead_promises, as: :promise
+end
diff --git a/app/views/ministers/_minister.json.jbuilder b/app/views/ministers/_minister.json.jbuilder
new file mode 100644
index 0000000..e4ca7cd
--- /dev/null
+++ b/app/views/ministers/_minister.json.jbuilder
@@ -0,0 +1,10 @@
+json.(minister,
+  :order_of_precedence,
+  :started_at,
+  :ended_at,
+  :first_name,
+  :last_name,
+  :last_name,
+  :title,
+  :avatar_url,
+  :person_short_honorific)
diff --git a/app/views/promises/_promise_listing.json.jbuilder b/app/views/promises/_promise_listing.json.jbuilder
new file mode 100644
index 0000000..5beddb3
--- /dev/null
+++ b/app/views/promises/_promise_listing.json.jbuilder
@@ -0,0 +1,25 @@
+# Need: status, last_update, title, description, build_canada_alignment, impact,
+#
+
+
+json.(promise,
+  :id,
+  :concise_title,
+  :description,
+  :text
+)
+
+# TODO: cache this on promise so we don't have to query the database every time
+json.last_evidence_at promise.evidences.order(updated_at: :desc).first&.updated_at&.strftime("%Y-%m-%d")
+
+json.(promise,
+  :bc_promise_direction,
+  :bc_promise_rank,
+  :bc_promise_rank_rationale
+)
+
+json.(promise,
+  :progress_score,
+  :progress_summary,
+
+  )
diff --git a/app/views/promises/show.json.jbuilder b/app/views/promises/show.json.jbuilder
new file mode 100644
index 0000000..6dd8b89
--- /dev/null
+++ b/app/views/promises/show.json.jbuilder
@@ -0,0 +1,16 @@
+
+json.(@promise,
+  :id,
+  :text,
+  :description,
+  :commitment_history_rationale,
+  :what_it_means_for_canadians,
+  :concise_title,
+  :progress_score,
+  :progress_summary,
+  :source_type,
+  :date_issued,
+)
+
+# TODO: cache this on promise so we don't have to query the database every time
+json.last_evidence_at @promise.evidences.order(updated_at: :desc).first&.updated_at&.strftime("%Y-%m-%d")