diff --git a/README.md b/README.md
index 58f0102..c898906 100644
--- a/README.md
+++ b/README.md
@@ -154,6 +154,33 @@ Data Source=127.0.0.1,1433;Initial Catalog=Cachorro;User Id=sa;Password=Abcd1234
 
 ```
 
+# Azure Entra ID
+
+```
+
+https://learn.microsoft.com/en-us/entra/identity-platform/v2-overview
+```
+
+```
+https://learn.microsoft.com/en-us/entra/identity-platform/quickstart-register-app
+```
+
+```
+https://learn.microsoft.com/en-us/entra/identity-platform/scopes-oidc
+```
+
+```
+
+https://learn.microsoft.com/en-us/entra/identity-platform/scenario-protected-web-api-app-configuration?tabs=aspnetcore#bearer-token
+
+```
+
+```
+
+https://learn.microsoft.com/en-us/entra/identity-platform/scenario-web-app-sign-user-app-configuration?tabs=aspnet
+
+```
+
 <br/>
 <br/>
 <br/>
diff --git a/src/DEPLOY.Cachorro.Api/Controllers/v1/CachorrosController.cs b/src/DEPLOY.Cachorro.Api/Controllers/v1/CachorrosController.cs
index 4ca1cbe..39865c4 100644
--- a/src/DEPLOY.Cachorro.Api/Controllers/v1/CachorrosController.cs
+++ b/src/DEPLOY.Cachorro.Api/Controllers/v1/CachorrosController.cs
@@ -1,5 +1,6 @@
 using Asp.Versioning;
 using DEPLOY.Cachorro.Repository;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using Swashbuckle.AspNetCore.Annotations;
@@ -9,6 +10,7 @@ namespace DEPLOY.Cachorro.Api.Controllers.v1
     [ApiController]
     [ApiVersion("1.0")]
     [Route("api/v{version:apiVersion}/[controller]")]
+    [Authorize]
     public class CachorrosController : ControllerBase
     {
         public readonly CachorroDbContext _context;
diff --git a/src/DEPLOY.Cachorro.Api/Extensions/Auth/AuthExtension.cs b/src/DEPLOY.Cachorro.Api/Extensions/Auth/AuthExtension.cs
new file mode 100644
index 0000000..6fb429a
--- /dev/null
+++ b/src/DEPLOY.Cachorro.Api/Extensions/Auth/AuthExtension.cs
@@ -0,0 +1,20 @@
+using Azure.Identity;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
+using Microsoft.Extensions.Azure;
+using Microsoft.Identity.Web;
+using System.Diagnostics.CodeAnalysis;
+
+namespace DEPLOY.Cachorro.Api.Extensions.Auth
+{
+    [ExcludeFromCodeCoverage]
+    public static class AuthExtension
+    {
+        public static void AddAuthExtension(
+            this IServiceCollection services,
+            IConfiguration configuration)
+        {
+            services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
+                .AddMicrosoftIdentityWebApi(configuration.GetSection("AzureAd"));
+        }
+    }
+}
diff --git a/src/DEPLOY.Cachorro.Api/Extensions/KeyVault/KeyVaultExtension.cs b/src/DEPLOY.Cachorro.Api/Extensions/KeyVault/KeyVaultExtension.cs
index ccc6cac..4ce7b51 100644
--- a/src/DEPLOY.Cachorro.Api/Extensions/KeyVault/KeyVaultExtension.cs
+++ b/src/DEPLOY.Cachorro.Api/Extensions/KeyVault/KeyVaultExtension.cs
@@ -7,8 +7,8 @@ namespace DEPLOY.Cachorro.Api.Extensions.KeyVault
     [ExcludeFromCodeCoverage]
     public static class KeyVaultExtension
     {
-        public static IServiceCollection AddKeyVaultExtension(
-            this IServiceCollection services, 
+        public static void AddKeyVaultExtension(
+            this IServiceCollection services,
             IConfiguration configuration)
         {
             services.AddAzureClients(clientBuilder =>
@@ -18,8 +18,6 @@ public static IServiceCollection AddKeyVaultExtension(
 
                 clientBuilder.UseCredential(new DefaultAzureCredential());
             });
-
-            return services;
         }
     }
 }
diff --git a/src/DEPLOY.Cachorro.Api/Extensions/Swagger/ConfigureSwaggerOptions.cs b/src/DEPLOY.Cachorro.Api/Extensions/Swagger/ConfigureSwaggerOptions.cs
index 0515567..abb84f0 100644
--- a/src/DEPLOY.Cachorro.Api/Extensions/Swagger/ConfigureSwaggerOptions.cs
+++ b/src/DEPLOY.Cachorro.Api/Extensions/Swagger/ConfigureSwaggerOptions.cs
@@ -1,5 +1,6 @@
 using Asp.Versioning;
 using Asp.Versioning.ApiExplorer;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.Extensions.Options;
 using Microsoft.OpenApi.Models;
 using Swashbuckle.AspNetCore.SwaggerGen;
@@ -12,6 +13,8 @@ namespace DEPLOY.Cachorro.Api.Extensions.Swagger
     [ExcludeFromCodeCoverage]
     public class ConfigureSwaggerOptions : IConfigureOptions<SwaggerGenOptions>
     {
+        public const string AuthenticationScheme = "JWT";
+        public const string HeaderName = "Authorization";
         private readonly IApiVersionDescriptionProvider provider;
 
         public ConfigureSwaggerOptions(IApiVersionDescriptionProvider provider) => this.provider = provider;
@@ -22,6 +25,31 @@ public void Configure(SwaggerGenOptions options)
             {
                 options.SwaggerDoc(description.GroupName, CreateInfoForApiVersion(description));
             }
+
+            options.AddSecurityDefinition(JwtBearerDefaults.AuthenticationScheme, new OpenApiSecurityScheme
+            {
+                Name = ConfigureSwaggerOptions.HeaderName,
+                In = ParameterLocation.Header,
+                Description = "Informe o token JWT com Bearer no formato: Bearer {token}",
+                Type = SecuritySchemeType.ApiKey,
+                BearerFormat = ConfigureSwaggerOptions.AuthenticationScheme,
+                Scheme = JwtBearerDefaults.AuthenticationScheme
+            });
+
+            options.AddSecurityRequirement(new OpenApiSecurityRequirement
+            {
+                {
+                    new OpenApiSecurityScheme
+                    {
+                        Reference = new OpenApiReference
+                        {
+                            Type = ReferenceType.SecurityScheme,
+                            Id = JwtBearerDefaults.AuthenticationScheme
+                        }
+                    },
+                    new string[]{}
+                }
+            });
         }
 
         private static OpenApiInfo CreateInfoForApiVersion(ApiVersionDescription description)
diff --git a/src/DEPLOY.Cachorro.Api/Program.cs b/src/DEPLOY.Cachorro.Api/Program.cs
index bba595c..732fd77 100644
--- a/src/DEPLOY.Cachorro.Api/Program.cs
+++ b/src/DEPLOY.Cachorro.Api/Program.cs
@@ -3,6 +3,7 @@
 using DEPLOY.Cachorro.Api.Extensions.KeyVault;
 using DEPLOY.Cachorro.Api.Extensions.Swagger;
 using DEPLOY.Cachorro.Api.Extensions.Telemetria;
+using DEPLOY.Cachorro.Api.Extensions.Auth;
 using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Serialization;
 
@@ -15,10 +16,15 @@ public static void Main(string[] args)
         {
             var builder = WebApplication.CreateBuilder(args);
 
+            builder.Services.AddAuthExtension(builder.Configuration);
+
             builder.Services.AddControllers()
                 .AddJsonOptions(opt =>
                 {
                     opt.JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter());
+                    opt.JsonSerializerOptions.WriteIndented = true;
+                    opt.JsonSerializerOptions.PropertyNameCaseInsensitive = true;
+
                 });
 
             builder.Services.AddRouting(opt =>
@@ -34,7 +40,7 @@ public static void Main(string[] args)
             builder.Logging.AddLogExtension(builder.Configuration);
             builder.Services.AddDatabaseExtension(builder.Configuration);
             builder.Services.AddTelemetriaExtension(builder.Configuration);
-            builder.Services.AddSwaggerExtension();
+            builder.Services.AddSwaggerExtension();
             builder.Configuration.AddAppConfigurationExtension(builder.Services);
 
             var app = builder.Build();
@@ -44,6 +50,7 @@ public static void Main(string[] args)
 
             app.UseHttpsRedirection();
 
+            app.UseAuthentication();
             app.UseAuthorization();
 
             app.MapControllers();
diff --git a/src/DEPLOY.Cachorro.Api/appsettings.json b/src/DEPLOY.Cachorro.Api/appsettings.json
index 9dd5923..4d84ab5 100644
--- a/src/DEPLOY.Cachorro.Api/appsettings.json
+++ b/src/DEPLOY.Cachorro.Api/appsettings.json
@@ -27,5 +27,10 @@
       "maxDelay": 2,
       "maxRetries": 10
     }
+  },
+  "AzureAd": {
+    "Instance": "",
+    "ClientId": "",
+    "TenantId": ""
   }
-}
\ No newline at end of file
+}