> ## Documentation Index > Fetch the complete documentation index at: https://ai.easyaf.dev/llms.txt > Use this file to discover all available pages before exploring further. # AuthorizationServerMetadata > The RFC 8414 authorization server metadata document, or its OpenID Connect discovery document counterpart, restricted to the endpoints, advertised grants and... ## Definition **Assembly:** Microsoft.OData.Mcp.Authentication.dll **Namespace:** Microsoft.OData.Mcp.Authentication.Outbound **Inheritance:** System.Object ## Syntax ```csharp theme={null} Microsoft.OData.Mcp.Authentication.Outbound.AuthorizationServerMetadata ``` ## Summary The RFC 8414 authorization server metadata document, or its OpenID Connect discovery document counterpart, restricted to the endpoints, advertised grants and scopes, and PKCE / dynamic client registration capability flags outbound OAuth discovery actually reads. ## Remarks Deserialized exclusively through [OutboundOAuthJsonContext](https://learn.microsoft.com/dotnet/api/microsoft.odata.mcp.authentication.outbound.outboundoauthjsoncontext); this type is never read with reflection-based `System.Text.Json` serialization (AOT: JSON source-gen; no reflection). Unknown fields the discovery document may carry (signing algorithms, UI locales, and similar) are intentionally not modeled here per `specs/v3/AUTHENTICATION.md` "Authentication outbound" type map. ## Examples ```csharp theme={null} var json = await client.GetStringAsync(wellKnownUri); var metadata = JsonSerializer.Deserialize(json, OutboundOAuthJsonContext.Default.AuthorizationServerMetadata); if (metadata is not null && metadata.AdvertisesGrant(ODataMcpAuthConstants.DeviceCodeGrantType)) { // Start a device code grant. } ``` ## Constructors ### .ctor #### Syntax ```csharp theme={null} public AuthorizationServerMetadata() ``` ### .ctor Inherited > [!NOTE] > > Inherited from `object` #### Syntax ```csharp theme={null} public Object() ``` ## Properties ### AuthorizationEndpoint Gets or sets the RFC 6749 authorization endpoint. #### Syntax ```csharp theme={null} public System.Uri AuthorizationEndpoint { get; set; } ``` #### Property Value Type: `System.Uri?` ### AuthorizationResponseIssParameterSupported Gets or sets whether the authorization response carries the RFC 9207 `iss` parameter. #### Syntax ```csharp theme={null} public System.Nullable AuthorizationResponseIssParameterSupported { get; set; } ``` #### Property Value Type: `System.Nullable?` ### ClientIdMetadataDocumentSupported Gets or sets whether this server accepts a client id metadata document (CIMD) in place of a pre-registered client id. #### Syntax ```csharp theme={null} public System.Nullable ClientIdMetadataDocumentSupported { get; set; } ``` #### Property Value Type: `System.Nullable?` ### CodeChallengeMethodsSupported Gets or sets the RFC 7636 PKCE code challenge methods this server accepts, such as `S256`. #### Syntax ```csharp theme={null} public System.Collections.Generic.IList CodeChallengeMethodsSupported { get; set; } ``` #### Property Value Type: `System.Collections.Generic.IList?` ### DeviceAuthorizationEndpoint Gets or sets the RFC 8628 device authorization endpoint. #### Syntax ```csharp theme={null} public System.Uri DeviceAuthorizationEndpoint { get; set; } ``` #### Property Value Type: `System.Uri?` ### GrantTypesSupported Gets or sets the OAuth 2.0 / OpenID Connect grant types this server advertises. #### Syntax ```csharp theme={null} public System.Collections.Generic.IList GrantTypesSupported { get; set; } ``` #### Property Value Type: `System.Collections.Generic.IList?` ### Issuer Gets or sets the issuer identifier, exactly as the document spells it. #### Syntax ```csharp theme={null} public string Issuer { get; set; } ``` #### Property Value Type: `string?` #### Remarks Deliberately a [String](https://learn.microsoft.com/dotnet/api/system.string) rather than a [Uri](https://learn.microsoft.com/dotnet/api/system.uri). RFC 8414 section 2 and RFC 9207 both compare issuer identifiers by simple string comparison, and [Uri](https://learn.microsoft.com/dotnet/api/system.uri) normalizes: it turns the authority-only issuer `https://accounts.google.com` into `https://accounts.google.com/`, which would make a conforming authorization server's `iss` look like a mix-up attack. Use [AuthorizationServerMetadata.IssuerUri](https://ai.easyaf.dev/odata-mcp/api-reference/Microsoft/OData/Mcp/Authentication/Outbound/AuthorizationServerMetadata.md#issueruri) where a URI is genuinely needed. ### IssuerUri Gets [AuthorizationServerMetadata.Issuer](https://ai.easyaf.dev/odata-mcp/api-reference/Microsoft/OData/Mcp/Authentication/Outbound/AuthorizationServerMetadata.md#issuer) as an absolute URI, or [`null`](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) when it is absent or is not an absolute URI. #### Syntax ```csharp theme={null} public System.Uri IssuerUri { get; } ``` #### Property Value Type: `System.Uri?` #### Remarks Never used for an issuer comparison — that is [AuthorizationServerMetadata.Issuer](https://ai.easyaf.dev/odata-mcp/api-reference/Microsoft/OData/Mcp/Authentication/Outbound/AuthorizationServerMetadata.md#issuer)'s job — only where a collaborator requires a [Uri](https://learn.microsoft.com/dotnet/api/system.uri), such as the SDK identity assertion provider. ### RegistrationEndpoint Gets or sets the RFC 7591 dynamic client registration endpoint, or [`null`](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) when this server requires a pre-registered client id. #### Syntax ```csharp theme={null} public System.Uri RegistrationEndpoint { get; set; } ``` #### Property Value Type: `System.Uri?` ### ResponseTypesSupported Gets or sets the response types this server's authorization endpoint accepts. #### Syntax ```csharp theme={null} public System.Collections.Generic.IList ResponseTypesSupported { get; set; } ``` #### Property Value Type: `System.Collections.Generic.IList?` ### RevocationEndpoint Gets or sets the RFC 7009 token revocation endpoint. #### Syntax ```csharp theme={null} public System.Uri RevocationEndpoint { get; set; } ``` #### Property Value Type: `System.Uri?` ### ScopesSupported Gets or sets the scopes this server advertises. #### Syntax ```csharp theme={null} public System.Collections.Generic.IList ScopesSupported { get; set; } ``` #### Property Value Type: `System.Collections.Generic.IList?` ### TokenEndpoint Gets or sets the RFC 6749 token endpoint. #### Syntax ```csharp theme={null} public System.Uri TokenEndpoint { get; set; } ``` #### Property Value Type: `System.Uri?` ### TokenEndpointAuthMethodsSupported Gets or sets the client authentication methods the token endpoint accepts. #### Syntax ```csharp theme={null} public System.Collections.Generic.IList TokenEndpointAuthMethodsSupported { get; set; } ``` #### Property Value Type: `System.Collections.Generic.IList?` ## Methods ### AdvertisesGrant Determines whether this server advertises a grant type, treating the RFC 8628 short form `device_code` and the [ODataMcpAuthConstants.DeviceCodeGrantType](https://ai.easyaf.dev/odata-mcp/api-reference/Microsoft/OData/Mcp/Authentication/Outbound/ODataMcpAuthConstants.md#devicecodegranttype) URN as equivalent in either direction. #### Syntax ```csharp theme={null} public bool AdvertisesGrant(string grantType) ``` #### Parameters | Name | Type | Description | | - | - | - | | `grantType` | `string` | The grant type to look for, such as `authorization_code` or `device_code`. | #### Returns Type: `bool` [`true`](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) when [AuthorizationServerMetadata.GrantTypesSupported](https://ai.easyaf.dev/odata-mcp/api-reference/Microsoft/OData/Mcp/Authentication/Outbound/AuthorizationServerMetadata.md#granttypessupported) contains an ordinal match for *grantType*, or its device-code counterpart; otherwise [`false`](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). #### Exceptions | Exception | Description | | - | - | | `ArgumentException` | Thrown when *grantType* is [`null`](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null), empty, or whitespace. | #### Remarks Advertised grant lists use either spelling depending on the authorization server, so a caller that asks for either one gets the same answer regardless of which spelling was actually published. ### AdvertisesScope Determines whether this server advertises a scope. #### Syntax ```csharp theme={null} public bool AdvertisesScope(string scope) ``` #### Parameters | Name | Type | Description | | - | - | - | | `scope` | `string` | The scope to look for. | #### Returns Type: `bool` [`true`](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) when [AuthorizationServerMetadata.ScopesSupported](https://ai.easyaf.dev/odata-mcp/api-reference/Microsoft/OData/Mcp/Authentication/Outbound/AuthorizationServerMetadata.md#scopessupported) contains an ordinal match for *scope*; otherwise [`false`](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). #### Exceptions | Exception | Description | | - | - | | `ArgumentException` | Thrown when *scope* is [`null`](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null), empty, or whitespace. | ### Equals Inherited Virtual > [!NOTE] > > Inherited from `object` #### Syntax ```csharp theme={null} public virtual bool Equals(object obj) ``` #### Parameters | Name | Type | Description | | - | - | - | | `obj` | `object?` | - | #### Returns Type: `bool` ### Equals Inherited > [!NOTE] > > Inherited from `object` #### Syntax ```csharp theme={null} public static bool Equals(object objA, object objB) ``` #### Parameters | Name | Type | Description | | - | - | - | | `objA` | `object?` | - | | `objB` | `object?` | - | #### Returns Type: `bool` ### GetHashCode Inherited Virtual > [!NOTE] > > Inherited from `object` #### Syntax ```csharp theme={null} public virtual int GetHashCode() ``` #### Returns Type: `int` ### GetType Inherited > [!NOTE] > > Inherited from `object` #### Syntax ```csharp theme={null} public System.Type GetType() ``` #### Returns Type: `System.Type` ### MemberwiseClone Inherited > [!NOTE] > > Inherited from `object` #### Syntax ```csharp theme={null} protected internal object MemberwiseClone() ``` #### Returns Type: `object` ### ReferenceEquals Inherited > [!NOTE] > > Inherited from `object` #### Syntax ```csharp theme={null} public static bool ReferenceEquals(object objA, object objB) ``` #### Parameters | Name | Type | Description | | - | - | - | | `objA` | `object?` | - | | `objB` | `object?` | - | #### Returns Type: `bool` ### ToString Inherited Virtual > [!NOTE] > > Inherited from `object` #### Syntax ```csharp theme={null} public virtual string ToString() ``` #### Returns Type: `string?` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.