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•Last updated Oct 7, 2026

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Cached-credential reuse via ClientOAuthOptions.ClientId fails: no way to specify token_endpoint_auth_method
modelcontextprotocol/csharp-sdk#1611 · opened on May 29, 2026 · 2.x
1
Identity Assertion Grant uses raw authorization server URL as token-exchange audience
modelcontextprotocol/csharp-sdk#1617 · opened on Jun 1, 2026 · 2.x
Allow setting token endpoint auth method on ClientOAuthOptions (#1612)
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#1615 opened Jun 1, 2026 · Updated Jul 28, 2026
Add prior-knowledge connection path for modern protocol clients
modelcontextprotocol/csharp-sdk#1696 · opened on Jul 8, 2026 · 2.x
Cancellation support via CancellationToken's fails
modelcontextprotocol/csharp-sdk#1365 · opened on Feb 23, 2026 · 2.x
6
OAuth authentication request fails with MS Entra-ID
modelcontextprotocol/csharp-sdk#648 · opened on Jul 25, 2025 · 2.x
5
Make server extension handlers composable with filters and subscriptions
modelcontextprotocol/csharp-sdk#1704 · opened on Jul 14, 2026 · 2.x
4
WWW-Authenticate header does not contain a resource metadata params
modelcontextprotocol/csharp-sdk#1050 · opened on Dec 1, 2025 · 2.x
3
Robustly parse quoted WWW-Authenticate parameters
modelcontextprotocol/csharp-sdk#1088 · opened on Dec 12, 2025 · 2.x
OAuth token refresh fails with AADSTS9010010
modelcontextprotocol/csharp-sdk#1587 · opened on May 19, 2026 · 2.x
Can't implement a CIMD client if auth provider doesn't put "none" first in it's list of supported token auth methods
modelcontextprotocol/csharp-sdk#1612 · opened on May 29, 2026 · 2.x
1
In the StreamableHttp mode MCP server, Scoped type dependencies are not properly injected into classes marked with [McpServerToolType].
modelcontextprotocol/csharp-sdk#544 · opened on Jun 25, 2025 · 2.x
7
Fix invalid initialize request handling
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#1709 opened Jul 19, 2026 · Updated Aug 1, 2026
4
Add app-rendered elicitation support to MCP Apps
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#1723 opened Jul 23, 2026 · Updated Aug 18, 2026Draft
1
Fix server/discover timeout interrupting OAuth
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#1719 opened Jul 21, 2026 · Updated Sep 26, 2026
7
Add transport-level cancellation support and proper cancellation token propagation (client->server)
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#1377 opened Feb 24, 2026 · Updated Jul 27, 2026Draft
2
Add an optional AIJsonSchemaCreateOptions to WithToolsFromAssembly.
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#1409 opened Mar 4, 2026 · Updated Jul 27, 2026
4
fix: propagate auth errors (401/403) immediately instead of falling b…
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#1444 opened Mar 16, 2026 · Updated Jul 27, 2026
2
feature: Added configurable token endpoint auth method selection
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#1496 opened Apr 2, 2026 · Updated Sep 22, 2026
Apply default tool annotation hints from McpServerToolAttribute
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#1675 opened Jun 28, 2026 · Updated Jul 27, 2026
Allow HttpClient BaseAddress as transport endpoint
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#1710 opened Jul 19, 2026 · Updated Aug 1, 2026
1
Allow Streamable HTTP GET reconnection
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#1713 opened Jul 19, 2026 · Updated Aug 1, 2026
1
Add JSON response mode to Streamable HTTP server
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#1714 opened Jul 19, 2026 · Updated Jul 30, 2026
4
Cancel background task runners on server disposal
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#1715 opened Jul 20, 2026 · Updated Aug 21, 2026
4
Deterministically cancel background task-store runners on server disposal via a server-lifetime CTS
modelcontextprotocol/csharp-sdk#1707 · opened on Jul 16, 2026 · 2.x
1

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2.x

Cached-credential reuse via ClientOAuthOptions.ClientId fails: no way to specify token_endpoint_auth_method

Identity Assertion Grant uses raw authorization server URL as token-exchange audience

Allow setting token endpoint auth method on ClientOAuthOptions (#1612)

Add prior-knowledge connection path for modern protocol clients

Cancellation support via CancellationToken's fails

OAuth authentication request fails with MS Entra-ID

Make server extension handlers composable with filters and subscriptions

WWW-Authenticate header does not contain a resource metadata params

Robustly parse quoted WWW-Authenticate parameters

OAuth token refresh fails with AADSTS9010010

Can't implement a CIMD client if auth provider doesn't put "none" first in it's list of supported token auth methods

In the StreamableHttp mode MCP server, Scoped type dependencies are not properly injected into classes marked with [McpServerToolType].

Fix invalid initialize request handling

Add app-rendered elicitation support to MCP Apps

Fix server/discover timeout interrupting OAuth

Add transport-level cancellation support and proper cancellation token propagation (client->server)

Add an optional `AIJsonSchemaCreateOptions` to `WithToolsFromAssembly`.

fix: propagate auth errors (401/403) immediately instead of falling b…

feature: Added configurable token endpoint auth method selection

Apply default tool annotation hints from McpServerToolAttribute

Allow HttpClient BaseAddress as transport endpoint

Allow Streamable HTTP GET reconnection

Add JSON response mode to Streamable HTTP server

Cancel background task runners on server disposal

Deterministically cancel background task-store runners on server disposal via a server-lifetime CTS

Issues