diff --git a/backend/Controllers/SectoresController.cs b/backend/Controllers/SectoresController.cs
new file mode 100644
index 0000000..7858464
--- /dev/null
+++ b/backend/Controllers/SectoresController.cs
@@ -0,0 +1,44 @@
+using Dapper;
+using Inventario.API.Data;
+using Inventario.API.Models;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Inventario.API.Controllers
+{
+  // [ApiController] habilita comportamientos estándar de API como la validación automática.
+  [ApiController]
+  // [Route("api/[controller]")] define la URL base para este controlador. 
+  // "[controller]" se reemplaza por el nombre de la clase sin "Controller", es decir, "api/sectores".
+  [Route("api/[controller]")]
+  public class SectoresController : ControllerBase
+  {
+    // Campo privado para guardar la referencia a nuestro contexto de Dapper.
+    private readonly DapperContext _context;
+
+    // El constructor recibe el DapperContext a través de la inyección de dependencias que configuramos en Program.cs.
+    public SectoresController(DapperContext context)
+    {
+      _context = context;
+    }
+
+    // [HttpGet] marca este método para que responda a peticiones GET a la ruta base ("api/sectores").
+    [HttpGet]
+    public async Task<IActionResult> ConsultarSectores()
+    {
+      // Definimos nuestra consulta SQL. Es buena práctica listar las columnas explícitamente.
+      var query = "SELECT Id, Nombre FROM dbo.sectores ORDER BY Nombre;";
+
+      // Creamos una conexión a la base de datos. El 'using' asegura que la conexión se cierre y se libere correctamente, incluso si hay errores.
+      using (var connection = _context.CreateConnection())
+      {
+        // Usamos el método QueryAsync de Dapper.
+        // <Sector> le dice a Dapper que mapee cada fila del resultado a un objeto de nuestra clase Sector.
+        // 'await' espera a que la base de datos responda sin bloquear el servidor.
+        var sectores = await connection.QueryAsync<Sector>(query);
+
+        // Ok() crea una respuesta HTTP 200 OK y serializa la lista de sectores a formato JSON.
+        return Ok(sectores);
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/backend/Program.cs b/backend/Program.cs
index 584ad34..ef8d541 100644
--- a/backend/Program.cs
+++ b/backend/Program.cs
@@ -6,47 +6,21 @@ var builder = WebApplication.CreateBuilder(args);
 builder.Services.AddControllers();
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();
-
-// --- AÑADIR ESTA LÍNEA ---
 builder.Services.AddSingleton<DapperContext>();
-// -------------------------
-
-// Add services to the container.
-// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
-builder.Services.AddOpenApi();
 
 var app = builder.Build();
 
 // Configure the HTTP request pipeline.
 if (app.Environment.IsDevelopment())
 {
-    app.MapOpenApi();
+    app.UseSwagger();
+    app.UseSwaggerUI(c =>
+    {
+        c.SwaggerEndpoint("/swagger/v1/swagger.json", "Inventario API V1");
+        c.RoutePrefix = string.Empty; 
+    });
 }
 
 app.UseHttpsRedirection();
-
-var summaries = new[]
-{
-    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
-};
-
-app.MapGet("/weatherforecast", () =>
-{
-    var forecast =  Enumerable.Range(1, 5).Select(index =>
-        new WeatherForecast
-        (
-            DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
-            Random.Shared.Next(-20, 55),
-            summaries[Random.Shared.Next(summaries.Length)]
-        ))
-        .ToArray();
-    return forecast;
-})
-.WithName("GetWeatherForecast");
-
-app.Run();
-
-record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)
-{
-    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
-}
+app.MapControllers();
+app.Run();
\ No newline at end of file
diff --git a/backend/obj/Debug/net9.0/Inventario.API.AssemblyInfo.cs b/backend/obj/Debug/net9.0/Inventario.API.AssemblyInfo.cs
index f896cd1..ae9f5c7 100644
--- a/backend/obj/Debug/net9.0/Inventario.API.AssemblyInfo.cs
+++ b/backend/obj/Debug/net9.0/Inventario.API.AssemblyInfo.cs
@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("Inventario.API")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+80eeac45d8b90ed69a6479e9d3dcadde5e317a90")]
 [assembly: System.Reflection.AssemblyProductAttribute("Inventario.API")]
 [assembly: System.Reflection.AssemblyTitleAttribute("Inventario.API")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]