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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.280 ·

MCP Apps (SEP-1865): support for UI resources via mcp_read_resource

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Claude Code adds MCP Apps support, letting a connected MCP server's tools render UI resources through a new mcp_read_resource protocol subtype

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AreaMCPwhat it touches
KindNew Featuresin v2.1.280,
Group of 2 Use it now Notable

Claude Code adds MCP Apps support, letting a connected MCP server's tools render UI resources through a new mcp_read_resource protocol subtype

What

  • A new protocol subtype mcp_read_resource lets a host read a ui:// resource from a connected MCP server (via resources/read) for rendering an MCP Apps UI panel.
  • Tool definitions can now carry a validated _meta field surfacing ui.resourceUri and ui.visibility (or the deprecated flat ui/resourceUri).
  • Two new capabilities, mcp_read_resource_v1 and mcp_tool_ui_meta_v1, are advertised during session setup, unless disabled by a local flag.

Why This is the initial support for MCP Apps (SEP-1865), letting MCP servers define rich UI panels tied to their tools rather than plain text output.

Read from
Names in the bundlemcp_read_resource_meta.ui
What the documentation says
Documented inclaude-code/agent-sdk/typescript

See this entry in the whole of v2.1.280 →

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