MCP Server Dev (Anthropic plugin)
Anthropic's official Claude Code plugin for people building MCP servers. It bundles three skills: one to build a server with tools and sign-in, one to build interactive MCP apps (UIs inside the chat), and one to package a server as an .mcpb bundle for easy install.
Test results
Run with our skill harness: the skill alone in a throwaway project, invoked by name, and the real output file checked. Skills are tested in Claude Code and Cursor only so far.
| Client | Result | Last passed | What we checked |
|---|---|---|---|
| Claude Code 2.1.296 (Claude Code) | Passed Tested 2026-10-29 | 2026-10-29 | spawned server.py over stdio JSON-RPC (uv run --with <sdk>): with mcp: initialize ok=True, tools listed add_note=True list_notes=True, list_notes after add_note returns seed TP-F1BF31=True and the new note=True |
| Cursor | Not tested yet | never |
Skill version: github.com/anthropics/claude-plugins-official @ f8c5e7a1 (2026-10-27).
Get it
The skill’s files and install instructions are in its repository: github.com/anthropics/claude-plugins-official/tree/main/plugins/mcp-server-dev.