#### [Abblix\.Oidc\.Server](https://www.abblix.com/en/docs/api/abblix-oidc-server 'index')
### [Abblix\.Oidc\.Server\.Endpoints\.DynamicClientManagement\.Validation](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.DynamicClientManagement.Validation 'Abblix\.Oidc\.Server\.Endpoints\.DynamicClientManagement\.Validation')

## SupportedGrantTypeValidator Class

Rejects client registration when any value in `grant_types` is not advertised as
supported by this server, returning `invalid_client_metadata` per OIDC DCR §3\.2\.
Without this gate the registration would succeed and the client would only fail later at
the token endpoint with `unsupported_grant_type`, or at the authorization endpoint
for the `implicit` grant\. Companion to [SupportedResponseTypeValidator](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.DynamicClientManagement.Validation.SupportedResponseTypeValidator 'Abblix\.Oidc\.Server\.Endpoints\.DynamicClientManagement\.Validation\.SupportedResponseTypeValidator'),
which applies the same rule to `response_types`\.

```csharp
public class SupportedGrantTypeValidator : Abblix.Oidc.Server.Endpoints.DynamicClientManagement.Validation.SyncClientRegistrationContextValidator
```

Inheritance [System\.Object](https://learn.microsoft.com/en-us/dotnet/api/system.object 'System\.Object') → [SyncClientRegistrationContextValidator](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.DynamicClientManagement.Validation.SyncClientRegistrationContextValidator 'Abblix\.Oidc\.Server\.Endpoints\.DynamicClientManagement\.Validation\.SyncClientRegistrationContextValidator') → SupportedGrantTypeValidator
### Constructors

## SupportedGrantTypeValidator\(IEnumerable\<IGrantTypeInformer\>\) Constructor {#Abblix.Oidc.Server.Endpoints.DynamicClientManagement.Validation.SupportedGrantTypeValidator.SupportedGrantTypeValidator(System.Collections.Generic.IEnumerable_Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer_)}

Rejects client registration when any value in `grant_types` is not advertised as
supported by this server, returning `invalid_client_metadata` per OIDC DCR §3\.2\.
Without this gate the registration would succeed and the client would only fail later at
the token endpoint with `unsupported_grant_type`, or at the authorization endpoint
for the `implicit` grant\. Companion to [SupportedResponseTypeValidator](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.DynamicClientManagement.Validation.SupportedResponseTypeValidator 'Abblix\.Oidc\.Server\.Endpoints\.DynamicClientManagement\.Validation\.SupportedResponseTypeValidator'),
which applies the same rule to `response_types`\.

```csharp
public SupportedGrantTypeValidator(System.Collections.Generic.IEnumerable<Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer> grantTypeInformers);
```
#### Parameters

###### `grantTypeInformers` [System\.Collections\.Generic\.IEnumerable&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.ienumerable-1 'System\.Collections\.Generic\.IEnumerable\`1')[IGrantTypeInformer](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer 'Abblix\.Oidc\.Server\.Common\.Interfaces\.IGrantTypeInformer')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.ienumerable-1 'System\.Collections\.Generic\.IEnumerable\`1') {#Abblix.Oidc.Server.Endpoints.DynamicClientManagement.Validation.SupportedGrantTypeValidator.SupportedGrantTypeValidator(System.Collections.Generic.IEnumerable_Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer_).grantTypeInformers}

All registered [IGrantTypeInformer](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer 'Abblix\.Oidc\.Server\.Common\.Interfaces\.IGrantTypeInformer')
            contributors\. Their union is the same `grant_types_supported` set the discovery
            endpoint advertises, so registration gating, run\-time gating, and discovery share one
            source of truth\. Notable contributors: the authorization endpoint yields
            `implicit` only when the host has called `EnableImplicitFlow()`; the composite
            token\-endpoint grant handler yields every registered token\-endpoint grant such as
            `authorization_code`, `refresh_token`, `client_credentials`,
            `jwt-bearer`, and `password` \(only when `EnablePasswordGrant()` has been
            called\)\.