Issues · modelcontextprotocol/python-sdk · GitHub Skip to content Navigation Menu Sign in Appearance settings * Platform * AI CODE CREATION * GitHub Copilot Write better code with AI * GitHub Copilot app Direct agents from issue to merge * MCP Registry Integrate external tools * DEVELOPER WORKFLOWS * Actions Automate any workflow * Codespaces Instant dev environments * Issues Plan and track work * Code Review Manage code changes * Code Quality Enforce quality at merge * APPLICATION SECURITY * GitHub Advanced Security Find and fix vulnerabilities * Code security Secure your code as you build * Secret protection Stop leaks before they start * EXPLORE * Why GitHub * Documentation * Blog * Changelog * Marketplace View all features * Solutions * BY COMPANY SIZE * Enterprises * Small and medium teams * Startups * Nonprofits * BY USE CASE * App Modernization * DevSecOps * DevOps * CI/CD * View all use cases * BY INDUSTRY * Healthcare * Financial services * Manufacturing * Government * View all industries View all solutions * Resources * EXPLORE BY TOPIC * AI * Software Development * DevOps * Security * View all topics * EXPLORE BY TYPE * Customer stories * Events & webinars * Ebooks & reports * Business insights * GitHub Skills * SUPPORT & SERVICES * Documentation * Customer support * Community forum * Trust center * Partners View all resources * Open Source * COMMUNITY * GitHub Sponsors Fund open source developers * PROGRAMS * Security Lab * Maintainer Community * GitHub Stars * Archive Program * REPOSITORIES * Topics * Trending * Collections * Enterprise * ENTERPRISE SOLUTIONS * Enterprise platform AI-powered developer platform * AVAILABLE ADD-ONS * GitHub Advanced Security Enterprise-grade security features * Copilot for Business Enterprise-grade AI features * Premium Support Enterprise-grade 24/7 support * Pricing Search / Sign in Sign up Appearance settings You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert Uh oh! There was an error while loading. Please reload this page . modelcontextprotocol / python-sdk Public * Notifications You must be signed in to change notification settings * Fork 3.9k * Star 24.3k * Code * Issues 225 * Pull requests 184 * Actions * Projects * Security and quality 6 * Insights Additional navigation options * Code * Issues * Pull requests * Actions * Projects * Security and quality * Insights * Issues * Assigned to me * Created by me * Mentioned * Recent activity * Views * Projects * Milestones * Labels * Feedback Preview * Collapse sidebar All issues New issue Issue creation is restricted in this repository Issues Search Issues is : issue state : open is:issue state:open Search Search results Open Closed * Is one-auth-configuration-per-server a deliberate constraint? Status: Open. # 3488   In modelcontextprotocol/python-sdk; · Neko1313 opened on Sep 9, 2026 * pkg_version() in Server.create_initialization_options doesn't guard against importlib.metadata.version() returning None v1 Affects the v1.x maintenance line Affects the v1.x maintenance line Status: Open. # 3487   In modelcontextprotocol/python-sdk; · j-brumback opened on Sep 9, 2026 * Add SEP-2640 (Skills Extension) protocol support Status: Open. # 3486   In modelcontextprotocol/python-sdk; · vijaydeepsinha opened on Sep 9, 2026 * MCPServer has no x-mcp-header declaration mechanism and never validates one, so an invalid annotation is served happily and dropped by every client spec-2026-07-28 Concerns the SDK's implementation of the 2026-07-28 MCP spec revision Concerns the SDK's implementation of the 2026-07-28 MCP spec revision v2 Affects the v2 line (2.x on main) Affects the v2 line (2.x on main) Status: Open. # 3484   In modelcontextprotocol/python-sdk; · atsuki-shirasawa opened on Sep 9, 2026 * Client never retries after -32020 HeaderMismatch, and there is no public way to pre-load the x-mcp-header map (SEP-2243 client SHOULD/MAY both unimplemented) spec-2026-07-28 Concerns the SDK's implementation of the 2026-07-28 MCP spec revision Concerns the SDK's implementation of the 2026-07-28 MCP spec revision v2 Affects the v2 line (2.x on main) Affects the v2 line (2.x on main) Status: Open. # 3483   In modelcontextprotocol/python-sdk; · atsuki-shirasawa opened on Sep 9, 2026 * Simplify src/mcp/shared/metadata_utils.py::get_display_name logic. Status: Open. # 3480   In modelcontextprotocol/python-sdk; · StarsExpress opened on Sep 8, 2026 * Missing prompt-level _meta support in MCPServer.prompt() and Prompt model v1 Affects the v1.x maintenance line Affects the v1.x maintenance line v2 Affects the v2 line (2.x on main) Affects the v2 line (2.x on main) Status: Open. # 3476   In modelcontextprotocol/python-sdk; · m3chanic opened on Sep 8, 2026 * [Bug] Client sends empty _meta:{} on every request; strict servers (Meta Ads MCP) reject with HTTP 400 v2 Affects the v2 line (2.x on main) Affects the v2 line (2.x on main) Status: Open. # 3473   In modelcontextprotocol/python-sdk; · kokhlo opened on Sep 8, 2026 * [v2] Add an end-to-end public-client PKCE server contract v1 Affects the v1.x maintenance line Affects the v1.x maintenance line v2 Affects the v2 line (2.x on main) Affects the v2 line (2.x on main) Status: Open. # 3472   In modelcontextprotocol/python-sdk; · NgoTuong12345 opened on Sep 8, 2026 * # TypeScript npm install @modelcontextprotocol/sdk zod # Python pip install mcp Status: Open. # 3471   In modelcontextprotocol/python-sdk; · Ik8888 opened on Sep 8, 2026 * StreamableHTTP: a client disconnect while reading the POST body is logged as an exception and answered 500 v1 Affects the v1.x maintenance line Affects the v1.x maintenance line v2 Affects the v2 line (2.x on main) Affects the v2 line (2.x on main) Status: Open. # 3469   In modelcontextprotocol/python-sdk; · HardMax71 opened on Sep 7, 2026 * CallToolResult structuredContent is not alias-normalized to match outputSchema v1 Affects the v1.x maintenance line Affects the v1.x maintenance line v2 Affects the v2 line (2.x on main) Affects the v2 line (2.x on main) Status: Open. # 3467   In modelcontextprotocol/python-sdk; · coder058 opened on Sep 7, 2026 Footer (c) 2026 GitHub, Inc. Footer navigation * Terms * Privacy * Security * Status * Community * Docs * Contact * Manage cookies * Do not share my personal information You can’t perform that action at this time.