diff --git a/app/controllers/api/public/v1/dossiers_controller.rb b/app/controllers/api/public/v1/dossiers_controller.rb
index 2e770d6ce..718036d6e 100644
--- a/app/controllers/api/public/v1/dossiers_controller.rb
+++ b/app/controllers/api/public/v1/dossiers_controller.rb
@@ -11,18 +11,43 @@ class API::Public::V1::DossiersController < API::Public::V1::BaseController
     dossier.build_default_individual
     if dossier.save
       dossier.prefill!(PrefillParams.new(dossier, params.to_unsafe_h).to_a)
-      render json: {
-        dossier_url: commencer_url(@procedure.path, prefill_token: dossier.prefill_token),
-        dossier_id: dossier.to_typed_id,
-        dossier_number: dossier.id
-      }, status: :created
+      render json: serialize_dossier(dossier), status: :created
     else
       render_bad_request(dossier.errors.full_messages.to_sentence)
     end
   end
 
+  def index
+    prefill_token = Array.wrap(params.fetch(:prefill_token, [])).flat_map { _1.split(',') }
+    dossiers = @procedure.dossiers.visible_by_user.prefilled.order(:created_at).where(prefill_token:)
+    if dossiers.present?
+      render json: dossiers.map { serialize_dossier(_1) }
+    else
+      render json: []
+    end
+  end
+
   private
 
+  def serialize_dossier(dossier)
+    if dossier.orphan?
+      {
+        dossier_url: commencer_url(@procedure.path, prefill_token: dossier.prefill_token),
+        state: :prefilled
+      }
+    else
+      {
+        state: dossier.state,
+        submitted_at: dossier.depose_at&.iso8601,
+        processed_at: dossier.processed_at&.iso8601
+      }
+    end.merge(
+      dossier_id: dossier.to_typed_id,
+      dossier_number: dossier.id,
+      dossier_prefill_token: dossier.prefill_token
+    ).compact
+  end
+
   def retrieve_procedure
     @procedure = Procedure.publiees_ou_brouillons.find_by(id: params[:id])
     render_not_found("procedure", params[:id]) if @procedure.blank?
diff --git a/config/routes.rb b/config/routes.rb
index e295e8179..ff4055da3 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -274,7 +274,7 @@ Rails.application.routes.draw do
       namespace :v1 do
         resources :demarches, only: [] do
           member do
-            resources :dossiers, only: :create
+            resources :dossiers, only: [:create, :index]
             resources :stats, only: :index
           end
         end
diff --git a/spec/controllers/api/public/v1/dossiers_controller_spec.rb b/spec/controllers/api/public/v1/dossiers_controller_spec.rb
index 9cb30f7c2..09f85b55e 100644
--- a/spec/controllers/api/public/v1/dossiers_controller_spec.rb
+++ b/spec/controllers/api/public/v1/dossiers_controller_spec.rb
@@ -130,6 +130,74 @@ RSpec.describe API::Public::V1::DossiersController, type: :controller do
     end
   end
 
+  describe '#index' do
+    let(:procedure) { dossier.procedure }
+    let(:dossier) { create(:dossier, prefilled: true, user: nil) }
+    let(:prefill_token) { dossier.prefill_token }
+    let(:params) { { id: procedure.id, prefill_token: } }
+
+    subject(:create_request) do
+      request.headers["Content-Type"] = "application/json"
+      get :index, params:
+    end
+
+    let(:body) { JSON.parse(response.body).map(&:deep_symbolize_keys) }
+
+    before { create_request }
+
+    context 'not found' do
+      let(:prefill_token) { 'invalid_token' }
+      it 'should respond with and empty array' do
+        expect(response).to have_http_status(:ok)
+        expect(body).to eq([])
+      end
+    end
+
+    context 'when dossier prefilled' do
+      it 'should respond with dossier state' do
+        expect(response).to have_http_status(:ok)
+        expect(body.first[:state]).to eq('prefilled')
+      end
+    end
+
+    context 'when dossier brouillon' do
+      let(:dossier) { create(:dossier, prefilled: true) }
+      it 'should respond with dossier state' do
+        expect(response).to have_http_status(:ok)
+        expect(body.first[:state]).to eq('brouillon')
+      end
+    end
+
+    context 'when dossier en_construction' do
+      let(:dossier) { create(:dossier, :en_construction, prefilled: true) }
+      it 'should respond with dossier state' do
+        expect(response).to have_http_status(:ok)
+        expect(body.first[:state]).to eq('en_construction')
+        expect(body.first[:submitted_at]).to eq(dossier.depose_at.iso8601)
+      end
+    end
+
+    context 'with multiple tokens' do
+      let(:dossier) { create(:dossier, prefilled: true, user: nil) }
+      let(:other_dossier) { create(:dossier, prefilled: true, user: nil, procedure:) }
+      let(:prefill_token) { [dossier.prefill_token, other_dossier.prefill_token] }
+
+      it 'should respond with dossiers state' do
+        expect(response).to have_http_status(:ok)
+        expect(body.map { _1[:dossier_number] }).to match_array([dossier.id, other_dossier.id])
+      end
+
+      context 'comma separated tokens' do
+        let(:prefill_token) { [dossier.prefill_token, other_dossier.prefill_token].join(',') }
+
+        it 'should respond with dossiers state' do
+          expect(response).to have_http_status(:ok)
+          expect(body.map { _1[:dossier_number] }).to match_array([dossier.id, other_dossier.id])
+        end
+      end
+    end
+  end
+
   private
 
   def find_champ_by_stable_id(dossier, stable_id)