List view

feat: add widgetSessionId to spec for widget consolidation

v2

Status: Draft (not ready).

modelcontextprotocol/ext-appsnumber 295

#295 In modelcontextprotocol/ext-apps;

· ochafik opened on Jan 17, 2026

spec: Add tool registration for Apps, to be called by Host (WebMCP-style!)

v2

Status: Open (in progress).

modelcontextprotocol/ext-appsnumber 72

#72 In modelcontextprotocol/ext-apps;

· ochafik opened on Dec 3, 2025

Add ui/close-resource request for UI to initiate termination

v2

Status: Open (in progress).

modelcontextprotocol/ext-appsnumber 215

#215 In modelcontextprotocol/ext-apps;

· fredericbarthelet opened on Jan 8, 2026

SEP: Add resource-close

enhancementNew feature or requestNew feature or request

Status: Open.

#203 In modelcontextprotocol/ext-apps;

· idosal opened on Jan 7, 2026

feat: Add Swift SDK for MCP Apps

Status: Draft (not ready).

modelcontextprotocol/ext-appsnumber 132

#132 In modelcontextprotocol/ext-apps;

· ochafik opened on Dec 11, 2025

feat: Add Kotlin SDK for MCP Apps

Status: Draft (not ready).

modelcontextprotocol/ext-appsnumber 134

#134 In modelcontextprotocol/ext-apps;

· ochafik opened on Dec 11, 2025

SEP: Define state behavior

v2

Status: Open.

#62 In modelcontextprotocol/ext-apps;

· idosal opened on Dec 1, 2025