diff --git a/app/views/private_api/ecnumbers.json.jbuilder b/app/views/private_api/ecnumbers.json.jbuilder
new file mode 100644
index 0000000..11f06f4
--- /dev/null
+++ b/app/views/private_api/ecnumbers.json.jbuilder
@@ -0,0 +1,4 @@
+json.array! @ecnumbers do |ecnumber|
+  json.code ecnumber.code
+  json.name ecnumber.name
+end
diff --git a/app/views/private_api/error.json.jbuilder b/app/views/private_api/error.json.jbuilder
new file mode 100644
index 0000000..1ad1d0d
--- /dev/null
+++ b/app/views/private_api/error.json.jbuilder
@@ -0,0 +1,2 @@
+json.name @error_name
+json.message @error_message
diff --git a/app/views/private_api/goterms.json.jbuilder b/app/views/private_api/goterms.json.jbuilder
new file mode 100644
index 0000000..051139d
--- /dev/null
+++ b/app/views/private_api/goterms.json.jbuilder
@@ -0,0 +1,5 @@
+json.array! @goterms do |goterm|
+  json.code goterm.code
+  json.name goterm.name
+  json.namespace goterm.namespace
+end
diff --git a/app/views/private_api/interpros.json.jbuilder b/app/views/private_api/interpros.json.jbuilder
new file mode 100644
index 0000000..b33b2b1
--- /dev/null
+++ b/app/views/private_api/interpros.json.jbuilder
@@ -0,0 +1,5 @@
+json.array! @interpros do |interpro|
+  json.code interpro.code
+  json.category interpro.category
+  json.name interpro.name
+end
diff --git a/app/views/private_api/metadata.json.jbuilder b/app/views/private_api/metadata.json.jbuilder
new file mode 100644
index 0000000..edb1ae2
--- /dev/null
+++ b/app/views/private_api/metadata.json.jbuilder
@@ -0,0 +1 @@
+json.db_version @data[:db_version]
diff --git a/app/views/private_api/proteins.json.jbuilder b/app/views/private_api/proteins.json.jbuilder
new file mode 100644
index 0000000..ca149b1
--- /dev/null
+++ b/app/views/private_api/proteins.json.jbuilder
@@ -0,0 +1,10 @@
+json.lca @lca_taxon ? @lca_taxon.id : -1
+json.common_lineage(@common_lineage.map(&:id))
+json.proteins @entries do |entry|
+  json.uniprotAccessionId entry.uniprot_accession_number
+  json.name entry.name
+  json.organism entry.taxon_id
+  json.ecNumbers(entry.ec_cross_references.map(&:ec_number_code))
+  json.goTerms(entry.go_cross_references.map(&:go_term_code))
+  json.interproEntries(entry.interpro_cross_references.map(&:interpro_entry_code))
+end
diff --git a/app/views/private_api/taxa.json.jbuilder b/app/views/private_api/taxa.json.jbuilder
new file mode 100644
index 0000000..82584da
--- /dev/null
+++ b/app/views/private_api/taxa.json.jbuilder
@@ -0,0 +1,6 @@
+json.array! @taxa do |taxon|
+  json.id taxon.id
+  json.name taxon.name
+  json.rank taxon.rank
+  json.lineage(Lineage.ranks.map { |rank| taxon.lineage.send(rank) })
+end