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SEP-2352: Clarify authorization server binding and migration

Status: Open.

#1634 In modelcontextprotocol/csharp-sdk;

· localden opened on Jun 6, 2026

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2026-07-28 Spec Compliance

SEP-2351: Explicitly specify RFC 8414 well-known URI suffix for MCP

Status: Open.

#1633 In modelcontextprotocol/csharp-sdk;

· localden opened on Jun 6, 2026

·  

2026-07-28 Spec Compliance

SEP-2207: OIDC-flavored refresh token guidance

Status: Open.

#1632 In modelcontextprotocol/csharp-sdk;

· localden opened on Jun 6, 2026

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2026-07-28 Spec Compliance

SEP-2133: Extensions framework for MCP

Status: Open.

#1631 In modelcontextprotocol/csharp-sdk;

· localden opened on Jun 6, 2026

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2026-07-28 Spec Compliance

SEP-414: Document OpenTelemetry Trace Context Propagation Conventions

Status: Open.

#1630 In modelcontextprotocol/csharp-sdk;

· localden opened on Jun 6, 2026

·  

2026-07-28 Spec Compliance

Identity Assertion Grant flow only supports OIDC ID tokens, not SAML 2.0 assertions

Status: Open.

#1618 In modelcontextprotocol/csharp-sdk;

· halter73 opened on Jun 1, 2026

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

Status: Open.

#1617 In modelcontextprotocol/csharp-sdk;

· halter73 opened on Jun 1, 2026

Stdio requests with deeply nested params can remain pending while the server remains healthy

bugSomething isn't workingSomething isn't working

Status: Open.

#1614 In modelcontextprotocol/csharp-sdk;

· cclabadmin opened on Jun 1, 2026

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

bugSomething isn't workingSomething isn't working

Status: Open.

#1612 In modelcontextprotocol/csharp-sdk;

· mikeholczer opened on May 29, 2026

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

Status: Open.

#1611 In modelcontextprotocol/csharp-sdk;

· mukunku opened on May 29, 2026

MCP Apps: Add round-trip integration test for _meta.ui serialization

enhancementNew feature or requestNew feature or request

Status: Open.

#1608 In modelcontextprotocol/csharp-sdk;

· mikekistler opened on May 28, 2026

MCP Apps: Add ergonomic WithAppTool helper to reduce wiring boilerplate

enhancementNew feature or requestNew feature or request

Status: Open.

#1607 In modelcontextprotocol/csharp-sdk;

· mikekistler opened on May 28, 2026