diff --git a/DoliMiddlewareApi/Controllers/DocumentController.cs b/DoliMiddlewareApi/Controllers/DocumentController.cs
index 82351c8..575fced 100644
--- a/DoliMiddlewareApi/Controllers/DocumentController.cs
+++ b/DoliMiddlewareApi/Controllers/DocumentController.cs
@@ -9,18 +9,12 @@ namespace DoliMiddlewareApi.Controllers
     public class DocumentController(DocumentService documentService) : ControllerBase
     {
 
-        [HttpPut("invoice/{invoiceRef}/build")]
-        public async Task<IActionResult> BuildInvoicePdf(string invoiceRef)
+        [HttpGet("invoice/{invoiceRef}/pdf")]
+        public async Task<IActionResult> GetInvoicePdf(string invoiceRef)
         {
-            await documentService.BuildInvoicePdfAsync(invoiceRef);
+            var (content, filename) = await documentService.BuildInvoicePdfAsync(invoiceRef);
 
-            var exists = await documentService.ExistsAsync(invoiceRef);
-
-            return Ok(new
-            {
-                generated = exists,
-                invoiceRef
-            });
+            return File(content, "application/pdf", filename);
         }
 
     }
diff --git a/DoliMiddlewareApi/Dtos/Dolibarr/DolibarrPdfResponse.cs b/DoliMiddlewareApi/Dtos/Dolibarr/DolibarrPdfResponse.cs
new file mode 100644
index 0000000..c73379f
--- /dev/null
+++ b/DoliMiddlewareApi/Dtos/Dolibarr/DolibarrPdfResponse.cs
@@ -0,0 +1,8 @@
+namespace DoliMiddlewareApi.Dtos.Dolibarr
+{
+    public class DolibarrPdfResponse
+    {
+        public string filename { get; set; } = default!;
+        public string content { get; set; } = default!;
+    }
+}
diff --git a/DoliMiddlewareApi/Program.cs b/DoliMiddlewareApi/Program.cs
index 8e99b5c..ba25023 100644
--- a/DoliMiddlewareApi/Program.cs
+++ b/DoliMiddlewareApi/Program.cs
@@ -103,6 +103,8 @@ builder.Services.AddScoped<InvoiceService>();
 // Servicio de negocio (clientes)
 builder.Services.AddScoped<ClientService>();
 
+builder.Services.AddScoped<DocumentService>();
+
 // Servicio de aplicación (orquesta login + cache)
 builder.Services.AddScoped<AuthApplicationService>();
 
diff --git a/DoliMiddlewareApi/Services/DocumentService.cs b/DoliMiddlewareApi/Services/DocumentService.cs
index 0d762e5..6eb1880 100644
--- a/DoliMiddlewareApi/Services/DocumentService.cs
+++ b/DoliMiddlewareApi/Services/DocumentService.cs
@@ -1,34 +1,30 @@
 using DoliMiddlewareApi.Dtos.command;
+using DoliMiddlewareApi.Dtos.Dolibarr;
 using DoliMiddlewareApi.Services.Clients;
+using System.Text.Json;
 
-namespace DoliMiddlewareApi.Services
+public class DocumentService(IDolibarrApiClient apiClient)
 {
-    public class DocumentService(IDolibarrApiClient apiClient)
+    public async Task<(byte[] content, string filename)> BuildInvoicePdfAsync(string invoiceRef)
     {
-
-        public async Task BuildInvoicePdfAsync(string invoiceRef)
+        var request = new BuildDocumentRequest
         {
-            var request = new BuildDocumentRequest
-            {
-                modulepart = "invoice",
-                original_file = $"{invoiceRef}/{invoiceRef}.pdf",
-                doctemplate = "crabe",
-                langcode = "es_ES"
-            };
+            modulepart = "invoice",
+            original_file = $"{invoiceRef}/{invoiceRef}.pdf",
+            doctemplate = "crabe",
+            langcode = "es_ES"
+        };
 
-            await apiClient.PutAsync("documents/builddoc",request);
-        }
+        var response = await apiClient.PutAsync("documents/builddoc", request);
 
-        public async Task<bool> ExistsAsync(string invoiceRef)
-        {
-            var file = $"¨{invoiceRef}/{invoiceRef}.pdf";
+        var result = JsonSerializer.Deserialize<DolibarrPdfResponse>(response);
 
-            var endpoint = $"documents?modulepart=invoice&id={invoiceRef}";
+        if (result == null || string.IsNullOrEmpty(result.content))
+            throw new Exception("Dolibarr no devolvió PDF");
 
-            var docs = await apiClient.GetCollectionAsync<string>(endpoint);
+        var bytes = Convert.FromBase64String(result.content);
 
-            return docs.Contains(file);
-
-        }
+        return (bytes, result.filename);
     }
-}
+
+}
\ No newline at end of file
diff --git a/DoliMiddlewareApi/appsettings.json b/DoliMiddlewareApi/appsettings.json
index c4da293..103fda1 100644
--- a/DoliMiddlewareApi/appsettings.json
+++ b/DoliMiddlewareApi/appsettings.json
@@ -8,8 +8,8 @@
   },
   "AllowedHosts": "*",
   "Dolibarr": {
-    "ApiUrl": "",
-    "ApiKey": ""
+    "ApiUrl": "http://localhost/api/index.php/explorer",
+    "ApiKey": "f5da1cef3f7edd4f9f305f950530599e18daae91"
   },
   "Jwt": {
     "Secret": "mi-super-secreto-jwt-aqui-cambiar-en-produccion",