diff --git a/Govor.API/Common/Extensions/ConfigurationProgramExtensions.cs b/Govor.API/Common/Extensions/ConfigurationProgramExtensions.cs
index 4795c58..58c622f 100644
--- a/Govor.API/Common/Extensions/ConfigurationProgramExtensions.cs
+++ b/Govor.API/Common/Extensions/ConfigurationProgramExtensions.cs
@@ -64,6 +64,7 @@ public static class ConfigurationProgramExtensions
         
         services.AddHttpContextAccessor(); // it's very important for CurrentUserService
         services.AddScoped<ICurrentUserService, CurrentUserService>();
+        services.AddScoped<ICurrentUserSessionService, CurrentUserSessionService>();
         
         services.AddMemoryCache();
         services.AddScoped<IPingHandlerService, PingHandlerService>();
diff --git a/Govor.Application.Tests/Infrastructure/Extensions/CurrentUserServiceTests.cs b/Govor.Application.Tests/Infrastructure/Extensions/CurrentUserServiceTests.cs
index 69b8fbc..31fc66b 100644
--- a/Govor.Application.Tests/Infrastructure/Extensions/CurrentUserServiceTests.cs
+++ b/Govor.Application.Tests/Infrastructure/Extensions/CurrentUserServiceTests.cs
@@ -1,5 +1,6 @@
 using System.Security.Claims;
 using Govor.Application.Infrastructure.Extensions;
+using Govor.Application.Interfaces.Infrastructure.Extensions;
 using Microsoft.AspNetCore.Http;
 using Moq;
 
@@ -9,7 +10,7 @@ namespace Govor.Application.Tests.Infrastructure.Extensions;
 public class CurrentUserServiceTests
 {
     private Mock<IHttpContextAccessor> _httpContextAccessorMock;
-    private CurrentUserService _currentUserService;
+    private ICurrentUserService _currentUserService;
 
     [SetUp]
     public void SetUp()
diff --git a/Govor.Application.Tests/Infrastructure/Extensions/CurrentUserSessionServiceTests.cs b/Govor.Application.Tests/Infrastructure/Extensions/CurrentUserSessionServiceTests.cs
new file mode 100644
index 0000000..c9c42e5
--- /dev/null
+++ b/Govor.Application.Tests/Infrastructure/Extensions/CurrentUserSessionServiceTests.cs
@@ -0,0 +1,109 @@
+using System.Security.Claims;
+using Govor.Application.Infrastructure.Extensions;
+using Govor.Application.Interfaces.Infrastructure.Extensions;
+using Microsoft.AspNetCore.Http;
+using Moq;
+
+namespace Govor.Application.Tests.Infrastructure.Extensions;
+
+[TestFixture]
+[TestOf(typeof(CurrentUserSessionService))]
+public class CurrentUserSessionServiceTests
+{
+    private Mock<IHttpContextAccessor> _httpContextAccessorMock;
+    private ICurrentUserSessionService _sessionService;
+    
+    [SetUp]
+    public void SetUp()
+    {
+        _httpContextAccessorMock = new Mock<IHttpContextAccessor>();
+        _sessionService = new CurrentUserSessionService(_httpContextAccessorMock.Object);
+    }
+
+    [Test]
+    public void GetCurrentSessionId_ValidSidClaim_ReturnsGuid()
+    {
+        // Arrange
+        var sid = Guid.NewGuid();
+        var claims = new[] { new Claim("sid", sid.ToString()) };
+        var identity = new ClaimsIdentity(claims);
+        var principal = new ClaimsPrincipal(identity);
+
+        var httpContextMock = new Mock<HttpContext>();
+        httpContextMock.Setup(x => x.User).Returns(principal);
+
+        _httpContextAccessorMock.Setup(x => x.HttpContext).Returns(httpContextMock.Object);
+
+        // Act
+        var result = _sessionService.GetUserSessionId();
+
+        // Assert
+        Assert.That(result, Is.EqualTo(sid));
+    }
+    
+    [Test]
+    public void GetCurrentSessionId_NoHttpContext_ThrowsUnauthorizedAccessException()
+    {
+        // Arrange
+        _httpContextAccessorMock.Setup(x => x.HttpContext).Returns((HttpContext)null);
+
+        // Act & Assert
+        var ex = Assert.Throws<UnauthorizedAccessException>(() => _sessionService.GetUserSessionId());
+        Assert.That(ex.Message, Is.EqualTo("Session id (sid) claim is missing or invalid"));
+    }
+    
+    
+    [Test]
+    public void GetCurrentSessionId_NoSidlaim_ThrowsUnauthorizedAccessException()
+    {
+        // Arrange
+        var claims = new[] { new Claim("otherClaim", "value") };
+        var identity = new ClaimsIdentity(claims);
+        var principal = new ClaimsPrincipal(identity);
+
+        var httpContextMock = new Mock<HttpContext>();
+        httpContextMock.Setup(x => x.User).Returns(principal);
+
+        _httpContextAccessorMock.Setup(x => x.HttpContext).Returns(httpContextMock.Object);
+
+        // Act & Assert
+        var ex = Assert.Throws<UnauthorizedAccessException>(() => _sessionService.GetUserSessionId());
+        Assert.That(ex.Message, Is.EqualTo("Session id (sid) claim is missing or invalid"));
+    }
+    
+    [Test]
+    public void GetUserSessionId_InvalidSidValueClaim_ThrowsUnauthorizedAccessException()
+    {
+        // Arrange
+        var claims = new[] { new Claim("sid", "invalid-guid") };
+        var identity = new ClaimsIdentity(claims);
+        var principal = new ClaimsPrincipal(identity);
+
+        var httpContextMock = new Mock<HttpContext>();
+        httpContextMock.Setup(x => x.User).Returns(principal);
+
+        _httpContextAccessorMock.Setup(x => x.HttpContext).Returns(httpContextMock.Object);
+
+        // Act & Assert
+        var ex = Assert.Throws<UnauthorizedAccessException>(() => _sessionService.GetUserSessionId());
+        Assert.That(ex.Message, Is.EqualTo("Session id (sid) claim is missing or invalid"));
+    }
+
+    [Test]
+    public void GetUserSessionId_EmptySidValueClaim_ThrowsUnauthorizedAccessException()
+    {
+        // Arrange
+        var claims = new[] { new Claim("sid", "") };
+        var identity = new ClaimsIdentity(claims);
+        var principal = new ClaimsPrincipal(identity);
+
+        var httpContextMock = new Mock<HttpContext>();
+        httpContextMock.Setup(x => x.User).Returns(principal);
+
+        _httpContextAccessorMock.Setup(x => x.HttpContext).Returns(httpContextMock.Object);
+
+        // Act & Assert
+        var ex = Assert.Throws<UnauthorizedAccessException>(() => _sessionService.GetUserSessionId());
+        Assert.That(ex.Message, Is.EqualTo("Session id (sid) claim is missing or invalid"));
+    }
+}
\ No newline at end of file
diff --git a/Govor.Application/Infrastructure/Extensions/CurrentUserSessionService.cs b/Govor.Application/Infrastructure/Extensions/CurrentUserSessionService.cs
new file mode 100644
index 0000000..f986ab4
--- /dev/null
+++ b/Govor.Application/Infrastructure/Extensions/CurrentUserSessionService.cs
@@ -0,0 +1,27 @@
+using Govor.Application.Interfaces.Infrastructure.Extensions;
+using Microsoft.AspNetCore.Http;
+
+namespace Govor.Application.Infrastructure.Extensions;
+
+public class CurrentUserSessionService : ICurrentUserSessionService
+{
+    private readonly IHttpContextAccessor _httpContextAccessor;
+
+    public CurrentUserSessionService(IHttpContextAccessor httpContextAccessor)
+    {
+        _httpContextAccessor = httpContextAccessor;
+    }
+
+    public Guid GetUserSessionId()
+    {
+        var user = _httpContextAccessor.HttpContext?.User;
+        var userIdClaim = user?.FindFirst("sid")?.Value;
+
+        if (string.IsNullOrEmpty(userIdClaim) || !Guid.TryParse(userIdClaim, out var userId))
+        {
+            throw new UnauthorizedAccessException("Session id (sid) claim is missing or invalid");
+        }
+
+        return userId;
+    }
+}
\ No newline at end of file
diff --git a/Govor.Application/Interfaces/Infrastructure/Extensions/ICurrentUserSessionService.cs b/Govor.Application/Interfaces/Infrastructure/Extensions/ICurrentUserSessionService.cs
new file mode 100644
index 0000000..f4000a9
--- /dev/null
+++ b/Govor.Application/Interfaces/Infrastructure/Extensions/ICurrentUserSessionService.cs
@@ -0,0 +1,6 @@
+namespace Govor.Application.Interfaces.Infrastructure.Extensions;
+
+public interface ICurrentUserSessionService
+{
+    Guid GetUserSessionId();
+}
\ No newline at end of file