diff --git a/app/controllers/clients_controller.rb b/app/controllers/clients_controller.rb
index 73bb5e23d..60ca43eb5 100644
--- a/app/controllers/clients_controller.rb
+++ b/app/controllers/clients_controller.rb
@@ -67,7 +67,7 @@ def index
         end
       client_types =
         if total.positive?
-          facet_by_key(response.aggregations.client_types.buckets)
+          facet_by_client_type(response.aggregations.client_types.buckets)
         end
       certificates =
          if total.positive?
diff --git a/app/controllers/concerns/facetable.rb b/app/controllers/concerns/facetable.rb
index 990f71629..ae61a55ce 100644
--- a/app/controllers/concerns/facetable.rb
+++ b/app/controllers/concerns/facetable.rb
@@ -73,6 +73,12 @@ module Facetable
 
   LOWER_BOUND_YEAR = 2_010
 
+  CLIENT_TYPES = {
+    "repository" => "Repository",
+    "periodical" => "Periodical",
+    "igsnCatalog" => "IGSN ID Catalog"
+  }.freeze
+
   included do
     def facet_by_key_as_string(arr)
       arr.map do |hsh|
@@ -201,6 +207,16 @@ def facet_by_bool(arr)
       end
     end
 
+    def facet_by_client_type(arr)
+      arr.map do |hsh|
+        {
+          "id" => hsh["key"],
+          "title" => CLIENT_TYPES[hsh["key"]] || hsh["key"],
+          "count" => hsh["doc_count"],
+        }
+      end
+    end
+
     def facet_by_software(arr)
       arr.map do |hsh|
         {
diff --git a/app/controllers/datacite_dois_controller.rb b/app/controllers/datacite_dois_controller.rb
index 3d09dc1ce..69fd2822c 100644
--- a/app/controllers/datacite_dois_controller.rb
+++ b/app/controllers/datacite_dois_controller.rb
@@ -133,6 +133,7 @@ def index
           page: page,
           sort: sort,
           random: params[:random],
+          client_type: params[:client_type],
         )
     end
 
@@ -219,6 +220,7 @@ def index
           resource_types = facet_by_combined_key(response.aggregations.resource_types.buckets)
           published = facet_by_range(response.aggregations.published.buckets)
           created = facet_by_key_as_string(response.aggregations.created.buckets)
+          created_by_month = response.aggregations.created_by_month ? facet_by_key_as_string(response.aggregations.created_by_month.buckets) : nil
           registered = facet_by_key_as_string(response.aggregations.registered.buckets)
           providers = facet_by_combined_key(response.aggregations.providers.buckets)
           clients = facet_by_combined_key(response.aggregations.clients.buckets)
@@ -278,6 +280,7 @@ def index
               states: states,
               "resourceTypes" => resource_types,
               created: created,
+              createdByMonth: created_by_month,
               published: published,
               registered: registered,
               providers: providers,
diff --git a/app/controllers/repositories_controller.rb b/app/controllers/repositories_controller.rb
index 3f53b7329..35b8309dc 100644
--- a/app/controllers/repositories_controller.rb
+++ b/app/controllers/repositories_controller.rb
@@ -74,7 +74,7 @@ def index
         end
       client_types =
         if total.positive?
-          facet_by_key(response.aggregations.client_types.buckets)
+          facet_by_client_type(response.aggregations.client_types.buckets)
         end
       repository_types =
         if total.positive?
diff --git a/app/models/client.rb b/app/models/client.rb
index c0d12d1b9..5e1452e8a 100644
--- a/app/models/client.rb
+++ b/app/models/client.rb
@@ -76,7 +76,7 @@ class Client < ApplicationRecord
                          in: %w[ROLE_DATACENTRE],
                          message: "Role %s is not included in the list"
   validates_inclusion_of :client_type,
-                         in: %w[repository periodical],
+                         in: %w[repository periodical igsnCatalog],
                          message: "Client type %s is not included in the list"
   validates_associated :provider
   validate :check_id, on: :create
diff --git a/app/models/doi.rb b/app/models/doi.rb
index e5c0cb729..60c136feb 100644
--- a/app/models/doi.rb
+++ b/app/models/doi.rb
@@ -769,6 +769,13 @@ def self.export_sub_aggregations
     }
   end
 
+  def self.igsn_id_catalog_aggregations
+    {
+      created_by_month: { date_histogram: { field: "created", interval: "month", format: "yyyy-MM", order: { _key: "desc" }, min_doc_count: 1 },
+      aggs: { bucket_truncate: { bucket_sort: { size: 10 } } } }
+    }
+  end
+
   def self.query_fields
     ["uid^50", "related_identifiers.relatedIdentifier^3", "titles.title^3", "creator_names^3", "creators.id^3", "publisher^3", "descriptions.description^3", "subjects.subject^3"]
   end
@@ -1028,6 +1035,8 @@ def self.query(query, options = {})
       client_export_aggregations
     elsif options[:totals_agg] == "prefix"
       prefix_aggregations
+    elsif options[:client_type] == "igsnCatalog"
+      query_aggregations(disable_facets: options[:disable_facets]).merge(self.igsn_id_catalog_aggregations)
     else
       query_aggregations(disable_facets: options[:disable_facets])
     end
@@ -1133,6 +1142,8 @@ def self.query(query, options = {})
     filter << { terms: { "client.certificate" => options[:certificate].split(",") } } if options[:certificate].present?
     filter << { term: { "creators.nameIdentifiers.nameIdentifier" => "https://orcid.org/#{orcid_from_url(options[:user_id])}" } } if options[:user_id].present?
     filter << { term: { "creators.nameIdentifiers.nameIdentifierScheme" => "ORCID" } } if options[:has_person].present?
+    filter << { term: { "client.client_type" =>  options[:client_type] } } if options[:client_type]
+    filter << { term: { "types.resourceTypeGeneral" => "PhysicalObject" } } if options[:client_type] == "igsnCatalog"
 
     # match either one of has_affiliation, has_organization, or has_funder
     if options[:has_organization].present?
diff --git a/spec/models/client_spec.rb b/spec/models/client_spec.rb
index 4f26310ee..921389037 100644
--- a/spec/models/client_spec.rb
+++ b/spec/models/client_spec.rb
@@ -337,6 +337,12 @@
       expect(client.errors.details).to be_empty
     end
 
+    it "igsnCatalog" do
+      client.client_type = "igsnCatalog"
+      expect(client.save).to be true
+      expect(client.errors.details).to be_empty
+    end
+
     it "unsupported" do
       client.client_type = "conference"
       expect(client.save).to be false
diff --git a/spec/models/prefix_spec.rb b/spec/models/prefix_spec.rb
index e3123d5f3..a34918333 100644
--- a/spec/models/prefix_spec.rb
+++ b/spec/models/prefix_spec.rb
@@ -6,6 +6,10 @@
   let!(:prefixes) { create_list(:prefix, 10) }
   let!(:prefix) { prefixes.first }
 
+  after(:each) do
+    Prefix.destroy_all
+  end
+
   describe "Validations" do
     it { should validate_presence_of(:uid) }
   end
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index e22f9865f..75d669571 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -76,12 +76,13 @@
   end
 
   config.before(:each) do |example|
-    prefix_pool_size = example.metadata[:prefix_pool_size].present? ? example.metadata[:prefix_pool_size] : ENV["PREFIX_POOL_SIZE"].to_i
-    if prefix_pool_size < 0
+    prefix_pool_size = example.metadata[:prefix_pool_size].present? ? example.metadata[:prefix_pool_size].to_i : ENV["PREFIX_POOL_SIZE"].to_i
+    if prefix_pool_size <= 0
       @prefix_pool = []
     else
       @prefix_pool = create_list(:prefix, prefix_pool_size)
     end
+    Prefix.import
   end
 end
 
diff --git a/spec/requests/clients_spec.rb b/spec/requests/clients_spec.rb
index d500c2649..c5e69a340 100644
--- a/spec/requests/clients_spec.rb
+++ b/spec/requests/clients_spec.rb
@@ -137,6 +137,25 @@
 
   describe "POST /clients" do
     context "when the request is valid" do
+      let(:params_igsn_catalog) do
+        {
+          "data" => {
+            "type" => "clients",
+            "attributes" => {
+              "symbol" => provider.symbol + ".IGSN",
+              "name" => "Imperial College",
+              "contactEmail" => "bob@example.com",
+              "clientType" => "igsnCatalog",
+            },
+            "relationships": {
+              "provider": {
+                "data": { "type": "providers", "id": provider.uid },
+              },
+            },
+          },
+        }
+      end
+
       it "creates a client" do
         post "/clients", params, headers
 
@@ -161,6 +180,24 @@
           [{ "count" => 2, "id" => "repository", "title" => "Repository" }],
         )
       end
+
+      it "creates a client with igsnCatalog client_type" do
+        post "/clients", params_igsn_catalog, headers
+
+        expect(last_response.status).to eq(201)
+        attributes = json.dig("data", "attributes")
+        expect(attributes["clientType"]).to eq("igsnCatalog")
+
+        Client.import
+        sleep 2
+
+        get "/clients", nil, headers
+
+        expect(json["data"].size).to eq(2)
+        expect(json.dig("meta", "clientTypes").find { |clientTypeAgg| clientTypeAgg["id"] == "igsnCatalog" }).to eq(
+          { "count" => 1, "id" => "igsnCatalog", "title" => "IGSN ID Catalog" },
+        )
+      end
     end
 
     context "when the request is invalid" do
diff --git a/spec/requests/datacite_dois_spec.rb b/spec/requests/datacite_dois_spec.rb
index de19e45c0..4e71d4bed 100755
--- a/spec/requests/datacite_dois_spec.rb
+++ b/spec/requests/datacite_dois_spec.rb
@@ -225,6 +225,34 @@
     end
   end
 
+  describe "GET /dois with filter", elasticsearch: true do
+    let!(:dois) { create_list(:doi, 10, client: client, aasm_state: "findable", version_info: "testtag") }
+    let(:client_igsn_id_catalog) { create(:client, provider: provider, client_type: "igsnCatalog") }
+    let!(:doi_igsn_id) { create(:doi, client: client_igsn_id_catalog, aasm_state: "findable", types: { "resourceTypeGeneral": "PhysicalObject" }) }
+    let!(:dois_other) { create_list(:doi, 5, client: client_igsn_id_catalog, aasm_state: "findable", types: { "resourceTypeGeneral": "Dataset" }) }
+
+    before do
+      DataciteDoi.import
+      sleep 2
+    end
+
+    it "filters by client_type when client-type is set", vcr: true do
+      get "/dois?client-type=repository", nil, headers
+
+      expect(last_response.status).to eq(200)
+      expect(json["data"].size).to eq(10)
+    end
+
+    it "returns additional createdByMonth meta attribute and only DOIs with resourceTypeGeneral=PhysicalObject and client_type=igsnCatalog when client-type is set to igsnCatalog", vcr: true do
+      get "/dois?client-type=igsnCatalog", nil, headers
+
+      expect(last_response.status).to eq(200)
+      expect(json["data"].size).to eq(1)
+      expect(json.dig("data", 0, "id")).to eq(doi_igsn_id.uid)
+      expect(json.dig("meta", "createdByMonth", 0, "title")).to eq(doi_igsn_id.created.to_time.strftime("%Y-%m"))
+    end
+  end
+
   describe "GET /dois with query", elasticsearch: true do
     let!(:doi) do
       create(:doi, client: client, aasm_state: "findable", creators:
diff --git a/spec/requests/provider_prefixes_spec.rb b/spec/requests/provider_prefixes_spec.rb
index db6a9fad5..cb1cb266e 100644
--- a/spec/requests/provider_prefixes_spec.rb
+++ b/spec/requests/provider_prefixes_spec.rb
@@ -3,8 +3,8 @@
 require "rails_helper"
 
 describe ProviderPrefixesController, type: :request, elasticsearch: true do
-  let(:consortium) { create(:provider, role_name: "ROLE_CONSORTIUM") }
-  let(:provider) do
+  let!(:consortium) { create(:provider, role_name: "ROLE_CONSORTIUM") }
+  let!(:provider) do
     create(
       :provider,
       consortium: consortium,
@@ -12,21 +12,30 @@
       password_input: "12345",
     )
   end
-  let(:prefix) { create(:prefix) }
+  let!(:prefix) { create(:prefix) }
   let!(:provider_prefixes) do
-    create_list(:provider_prefix, 3, provider: provider)
+    [
+      create(:provider_prefix, provider: provider, prefix: @prefix_pool[0]),
+      create(:provider_prefix, provider: provider, prefix: @prefix_pool[1]),
+      create(:provider_prefix, provider: provider, prefix: @prefix_pool[2])
+    ]
   end
-  let!(:provider_prefixes2) { create_list(:provider_prefix, 2) }
-  let(:provider_prefix) { create(:provider_prefix) }
-  let(:bearer) { User.generate_token(role_id: "staff_admin") }
-  let(:headers) do
+  let!(:provider_prefixes2) do
+    [
+      create(:provider_prefix, prefix: @prefix_pool[3]),
+      create(:provider_prefix, prefix: @prefix_pool[4])
+    ]
+  end
+  let!(:provider_prefix) { create(:provider_prefix, prefix: @prefix_pool[5]) }
+  let!(:bearer) { User.generate_token(role_id: "staff_admin") }
+  let!(:headers) do
     {
       "HTTP_ACCEPT" => "application/vnd.api+json",
       "HTTP_AUTHORIZATION" => "Bearer " + bearer,
     }
   end
 
-  before do
+  before(:each) do
     ProviderPrefix.import
     Prefix.import
     Provider.import
@@ -102,7 +111,7 @@
       get "/provider-prefixes?query=10.508", nil, headers
 
       expect(last_response.status).to eq(200)
-      expect(json["data"].size).to eq(5)
+      expect(json["data"].size).to eq(6)
     end
   end
 
@@ -111,7 +120,7 @@
       get "/provider-prefixes", nil, headers
 
       expect(last_response.status).to eq(200)
-      expect(json["data"].size).to eq(5)
+      expect(json["data"].size).to eq(6)
     end
 
     it "returns correct paging links" do
@@ -191,19 +200,21 @@
         get "/prefixes?state=unassigned", nil, headers
 
         expect(last_response.status).to eq(200)
-        expect(json.dig("meta", "total")).to eq(@prefix_pool.length)
+        expect(json.dig("meta", "total")).to eq(@prefix_pool.length - 6)
 
 
         delete "/provider-prefixes/#{provider_prefix.uid}", nil, headers
 
         expect(last_response.status).to eq(204)
 
+        Prefix.import
+        ProviderPrefix.import
         sleep 2
 
         get "/prefixes?state=unassigned", nil, headers
 
         expect(last_response.status).to eq(200)
-        expect(json.dig("meta", "total")).to eq(@prefix_pool.length + 1)
+        expect(json.dig("meta", "total")).to eq(@prefix_pool.length - 5)
       end
     end