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Add a pluggable server extension API with MCP Apps by Kludex · Pull Request #3003 · modelcontextprotocol/python-sdk · GitHub

Add a pluggable server extension API with MCP Apps - #3003

Merged

maxisbey merged 14 commits into

mainfrom

extension-api-sep-2133

Jun 29, 2026

Commits on Jun 26, 2026

Surface the SEP-2133 extensions capability map
Kludex
committed
2c7fc6e
Add the pluggable Extension API to MCPServer
Kludex
committed
68b9c7e
Add the MCP Apps extension (io.modelcontextprotocol/ui)
Kludex
committed
c8684e9
Add the Tasks extension (io.modelcontextprotocol/tasks)
Kludex
committed
51ad100
Add apps and tasks example stories and migration notes
Kludex
committed
ff285f4
Make extensions construction-only and improve the tasks example
Kludex
committed
42d6900
Clarify Tasks opt-in and per-tool task_support scope
Kludex
committed
7ca1530
Merge remote-tracking branch 'origin/main' into extension-api-sep-2133
Kludex
committed
aa78671
Drop the Tasks extension; defer to a SEP-2663 rewrite
Kludex
committed
cb2c456
Address extension-API review: layering, enforcement, version gating, Apps fixes
Kludex
committed
0f440b1