diff --git a/README.md b/README.md
index 1fb6bf6..9361126 100644
--- a/README.md
+++ b/README.md
@@ -221,6 +221,21 @@ You also need to copy it from the server given claims to the local claims. E.g.
 yourContext.StoreRemoteAuthInSchemeAsync(..., (identity, remote)=>OidcClaimsCultureProviderHelper.CopyClaims(identity, remote))))
 ```
 
+## Claims helpers
+
+https://openid.net/specs/openid-connect-core-1_0.html#ClaimsParameter specifies how to request claims from the request.
+
+Notice, you still have to manually check they are present in the response.
+
+```csharp
+//in the login controller
+var claims = new RequestClaimsParameterValue()
+                 .IdTokenClaim(Claims.AuthenticationTime, true);
+this.InitiateAuthorizationCodeLogin(returnUrl, ..., claims.AsOpenIddictParameter());
+...
+//in the callback controller
+this.StoreRemoteAuthInSchemeAsync(..., (principal)=>principal.GetClaim(Claims.AuthenticationTime)...)
+```
 
 ## Http helpers
 
diff --git a/src/Catglobe.Openiddict.Contrib.Client/Catglobe.Openiddict.Contrib.Client.csproj b/src/Catglobe.Openiddict.Contrib.Client/Catglobe.Openiddict.Contrib.Client.csproj
index 43b791d..f7d4d52 100644
--- a/src/Catglobe.Openiddict.Contrib.Client/Catglobe.Openiddict.Contrib.Client.csproj
+++ b/src/Catglobe.Openiddict.Contrib.Client/Catglobe.Openiddict.Contrib.Client.csproj
@@ -18,7 +18,7 @@
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
 
-  <ItemGroup Condition=" ('$(TargetFrameworkIdentifier)' == '.NETCoreApp' And $([MSBuild]::VersionLessThan($(TargetFrameworkVersion), '3.0'))) Or&#xD;&#xA;                         ('$(TargetFrameworkIdentifier)' == '.NETFramework') Or&#xD;&#xA;						 ('$(TargetFrameworkIdentifier)' == '.NETStandard') ">
+  <ItemGroup Condition=" ('$(TargetFrameworkIdentifier)' == '.NETCoreApp' And $([MSBuild]::VersionLessThan($(TargetFrameworkVersion), '3.0'))) Or ('$(TargetFrameworkIdentifier)' == '.NETFramework') Or ('$(TargetFrameworkIdentifier)' == '.NETStandard') ">
     <PackageReference Include="Microsoft.AspNetCore.Authentication" />
     <PackageReference Include="Microsoft.AspNetCore.Diagnostics.Abstractions" />
     <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" />
diff --git a/src/Catglobe.Openiddict.Contrib.Client/ControllerHelpers/AuthorizationCodeHelpers.cs b/src/Catglobe.Openiddict.Contrib.Client/ControllerHelpers/AuthorizationCodeHelpers.cs
index 814ed43..4e6d9be 100644
--- a/src/Catglobe.Openiddict.Contrib.Client/ControllerHelpers/AuthorizationCodeHelpers.cs
+++ b/src/Catglobe.Openiddict.Contrib.Client/ControllerHelpers/AuthorizationCodeHelpers.cs
@@ -2,6 +2,7 @@
 using OpenIddict.Client.AspNetCore;
 using System.Security.Claims;
 using Microsoft.AspNetCore.Mvc;
+using static OpenIddict.Abstractions.OpenIddictConstants;
 
 namespace Openiddict.Contrib.Client.ControllerHelpers;
 
@@ -22,8 +23,9 @@ public static class AuthorizationCodeHelpers
    /// <param name="controller">The controller</param>
    /// <param name="returnUrl">Parameter from UI where the user will be redirected after the auth is done</param>
    /// <param name="provider">The client you want to authenticate with</param>
+   /// <param name="claims">Any additional claims you want to request. See <see cref="RequestClaimsParameterValue.AsOpenIddictParameter"></see>.</param>
    /// <returns>The result you need to return from the controller</returns>
-   public static ChallengeResult InitiateAuthorizationCodeLogin(this ControllerBase controller, string returnUrl, string? provider = null)
+   public static ChallengeResult InitiateAuthorizationCodeLogin(this ControllerBase controller, string returnUrl, string? provider = null, OpenIddictParameter? claims = default)
    {
       var properties = new AuthenticationProperties {
          // Only allow local return URLs to prevent open redirect attacks.
@@ -31,6 +33,8 @@ public static ChallengeResult InitiateAuthorizationCodeLogin(this ControllerBase
       };
       if (!string.IsNullOrEmpty(provider))
          properties.Items[OpenIddictClientAspNetCoreConstants.Properties.ProviderName] = provider;
+      if (claims is {} claim)
+         properties.Parameters[Parameters.Claims] = claim;
       // Ask the OpenIddict client middleware to redirect the user agent to the identity provider.
       return controller.Challenge(properties, OpenIddictClientAspNetCoreDefaults.AuthenticationScheme);
    }
diff --git a/src/Catglobe.Openiddict.Contrib.Client/MinimalApiHelpers/AuthorizationCodeHelpers.cs b/src/Catglobe.Openiddict.Contrib.Client/MinimalApiHelpers/AuthorizationCodeHelpers.cs
index bfaf14c..28ef4eb 100644
--- a/src/Catglobe.Openiddict.Contrib.Client/MinimalApiHelpers/AuthorizationCodeHelpers.cs
+++ b/src/Catglobe.Openiddict.Contrib.Client/MinimalApiHelpers/AuthorizationCodeHelpers.cs
@@ -21,8 +21,9 @@ public static class AuthorizationCodeHelpers
    /// <param name="httpContext">The controller</param>
    /// <param name="returnUrl">Parameter from UI where the user will be redirected after the auth is done</param>
    /// <param name="provider">The client you want to authenticate with</param>
+   /// <param name="claims">Any additional claims you want to request. See <see cref="RequestClaimsParameterValue.AsOpenIddictParameter"></see>.</param>
    /// <returns>The result you need to return from the controller</returns>
-   public static IResult InitiateAuthorizationCodeLogin(this HttpContext httpContext, string returnUrl, string? provider = null)
+   public static IResult InitiateAuthorizationCodeLogin(this HttpContext httpContext, string returnUrl, string? provider = null, OpenIddictParameter? claims = default)
    {
       var properties = new AuthenticationProperties {
          // Only allow local return URLs to prevent open redirect attacks.
@@ -30,6 +31,8 @@ public static IResult InitiateAuthorizationCodeLogin(this HttpContext httpContex
       };
       if (!string.IsNullOrEmpty(provider))
          properties.Items[OpenIddictClientAspNetCoreConstants.Properties.ProviderName] = provider;
+      if (claims is {} claim)
+         properties.Parameters[Parameters.Claims] = claim;
       // Ask the OpenIddict client middleware to redirect the user agent to the identity provider.
       return Results.Challenge(properties, new List<string> { OpenIddictClientAspNetCoreDefaults.AuthenticationScheme });
    }
diff --git a/src/Catglobe.Openiddict.Contrib.Client/RazorPageHelpers/AuthorizationCodeHelpers.cs b/src/Catglobe.Openiddict.Contrib.Client/RazorPageHelpers/AuthorizationCodeHelpers.cs
index 66a5eb2..46b6d20 100644
--- a/src/Catglobe.Openiddict.Contrib.Client/RazorPageHelpers/AuthorizationCodeHelpers.cs
+++ b/src/Catglobe.Openiddict.Contrib.Client/RazorPageHelpers/AuthorizationCodeHelpers.cs
@@ -23,8 +23,9 @@ public static class AuthorizationCodeHelpers
    /// <param name="model">The PageModel</param>
    /// <param name="returnUrl">Parameter from UI where the user will be redirected after the auth is done</param>
    /// <param name="provider">The client you want to authenticate with</param>
+   /// <param name="claims">Any additional claims you want to request. See <see cref="RequestClaimsParameterValue.AsOpenIddictParameter"></see>.</param>
    /// <returns>The result you need to return from the PageModel</returns>
-   public static ChallengeResult InitiateAuthorizationCodeLogin(this PageModel model, string returnUrl, string? provider = null)
+   public static ChallengeResult InitiateAuthorizationCodeLogin(this PageModel model, string returnUrl, string? provider = null, OpenIddictParameter? claims = default)
    {
       var properties = new AuthenticationProperties {
          // Only allow local return URLs to prevent open redirect attacks.
@@ -32,6 +33,8 @@ public static ChallengeResult InitiateAuthorizationCodeLogin(this PageModel mode
       };
       if (!string.IsNullOrEmpty(provider))
          properties.Items[OpenIddictClientAspNetCoreConstants.Properties.ProviderName] = provider;
+      if (claims is {} claim)
+         properties.Parameters[Parameters.Claims] = claim;
       // Ask the OpenIddict client middleware to redirect the user agent to the identity provider.
       return model.Challenge(properties, OpenIddictClientAspNetCoreDefaults.AuthenticationScheme);
    }
diff --git a/src/Catglobe.Openiddict.Contrib.Client/RequestClaimsParameterValue.cs b/src/Catglobe.Openiddict.Contrib.Client/RequestClaimsParameterValue.cs
new file mode 100644
index 0000000..1849c3a
--- /dev/null
+++ b/src/Catglobe.Openiddict.Contrib.Client/RequestClaimsParameterValue.cs
@@ -0,0 +1,129 @@
+#if NET
+using System.Text.Json.Nodes;
+
+namespace Openiddict.Contrib.Client;
+
+/// <summary>
+/// Helper class for setting parameters matching https://openid.net/specs/openid-connect-core-1_0.html#ClaimsParameter.
+/// </summary>
+public class RequestClaimsParameterValue
+{
+   private readonly Dictionary<string, JsonNode?> _userinfo = new();
+   private readonly Dictionary<string, JsonNode?> _claims = new();
+
+   /// <summary>
+   /// Specify a user info claim that should be returned from the authentication request.
+   /// </summary>
+   /// <param name="claim">See <see cref="Claims"/>.</param>
+   /// <param name="essential">Indicates whether the Claim being requested is an Essential Claim. If the value is true, this indicates that the Claim is an Essential Claim.</param>
+   /// <returns>This class for chaining.</returns>
+   public RequestClaimsParameterValue UserInfoClaim(string claim, bool essential = false)
+   {
+      _userinfo.Add(claim, AsNode(essential, null, null));
+      return this;
+   }
+
+   /// <summary>
+   /// Specify a user info claim that should be returned from the authentication request.
+   /// </summary>
+   /// <param name="claim">See <see cref="Claims"/>.</param>
+   /// <param name="value">Requests that the Claim be returned with a particular value.</param>
+   /// <param name="essential">Indicates whether the Claim being requested is an Essential Claim. If the value is true, this indicates that the Claim is an Essential Claim.</param>
+   /// <returns>This class for chaining.</returns>
+   public RequestClaimsParameterValue UserInfoClaim(string claim, string value, bool essential = false)
+   {
+      _userinfo.Add(claim, AsNode(essential, value, null));
+      return this;
+   }
+
+   /// <summary>
+   /// Specify a user info claim that should be returned from the authentication request.
+   /// </summary>
+   /// <param name="claim">See <see cref="Claims"/>.</param>
+   /// <param name="values">Requests that the Claim be returned with one of a set of values, with the values appearing in order of preference.</param>
+   /// <param name="essential">Indicates whether the Claim being requested is an Essential Claim. If the value is true, this indicates that the Claim is an Essential Claim.</param>
+   /// <returns>This class for chaining.</returns>
+   public RequestClaimsParameterValue UserInfoClaim(string claim, IReadOnlyCollection<string> values, bool essential)
+   {
+      _userinfo.Add(claim, AsNode(essential, null, values));
+      return this;
+   }
+
+   private static JsonObject? AsNode(bool essential, string? value, IReadOnlyCollection<string?>? values)
+   {
+      var json = new JsonObject(GetJsonNode(essential, value, values));
+      return json.Count == 0 ? default : json;
+   }
+
+   /// <summary>
+   /// Specify a claim that should be returned from the authentication request.
+   /// </summary>
+   /// <param name="claim">See <see cref="Claims"/>.</param>
+   /// <param name="essential">Indicates whether the Claim being requested is an Essential Claim. If the value is true, this indicates that the Claim is an Essential Claim.</param>
+   /// <returns>This class for chaining.</returns>
+   public RequestClaimsParameterValue IdTokenClaim(string claim, bool essential = false)
+   {
+      _claims.Add(claim, AsNode(essential, null, null));
+      return this;
+   }
+
+   /// <summary>
+   /// Specify a claim that should be returned from the authentication request.
+   /// </summary>
+   /// <param name="claim">See <see cref="Claims"/>.</param>
+   /// <param name="value">Requests that the Claim be returned with a particular value.</param>
+   /// <param name="essential">Indicates whether the Claim being requested is an Essential Claim. If the value is true, this indicates that the Claim is an Essential Claim.</param>
+   /// <returns>This class for chaining.</returns>
+   public RequestClaimsParameterValue IdTokenClaim(string claim, string value, bool essential = false)
+   {
+      _claims.Add(claim, AsNode(essential, value, null));
+      return this;
+   }
+
+   /// <summary>
+   /// Specify a claim that should be returned from the authentication request.
+   /// </summary>
+   /// <param name="claim">See <see cref="Claims"/>.</param>
+   /// <param name="values">Requests that the Claim be returned with one of a set of values, with the values appearing in order of preference.</param>
+   /// <param name="essential">Indicates whether the Claim being requested is an Essential Claim. If the value is true, this indicates that the Claim is an Essential Claim.</param>
+   /// <returns>This class for chaining.</returns>
+   public RequestClaimsParameterValue IdTokenClaim(string claim, IReadOnlyCollection<string> values, bool essential)
+   {
+      _claims.Add(claim, AsNode(essential, null, values));
+      return this;
+   }
+
+   /// <summary>
+   /// Convert the current settings to a <see cref="OpenIddictParameter"/> that can be used in a request.
+   /// <example>
+   /// <code>
+   /// new AuthenticationProperties().SetParameter(Parameters.Claims, new RequestClaimsParameterValue().IdTokenClaim(Claims.AuthenticationTime, true).AsOpenIddictParameter());
+   /// </code></example>
+   /// </summary>
+   /// <returns></returns>
+   public OpenIddictParameter? AsOpenIddictParameter()
+   {
+      if (_userinfo.Count == 0 && _claims.Count == 0)
+         return null;
+      var lst = new List<KeyValuePair<string, JsonNode?>>();
+
+      if (_userinfo.Count != 0)
+         lst.Add(new("userinfo", new JsonObject(_userinfo)));
+      if (_claims.Count != 0)
+         lst.Add(new(Parameters.IdToken, new JsonObject(_claims)));
+      return new OpenIddictParameter(new JsonObject(lst));
+   }
+
+   private static IEnumerable<KeyValuePair<string, JsonNode?>> GetJsonNode(bool essential, string? value, IReadOnlyCollection<string?>? values)
+   {
+      if (essential)
+         yield return new("essential", true);
+      if (value is not null)
+         yield return new("value", value!);
+      if (values is not null)
+         yield return new("values", new JsonArray(values.Select(x => (JsonNode?)JsonValue.Create(x)).ToArray()));
+   }
+
+
+}
+#endif