claude-handoff-mcp

The first open-source MCP server for Claude Design handoff bundles.

Paste a Claude Design handoff URL in Cursor, Claude Code, Cline, Windsurf — or any MCP-compatible client — and the bundle materializes in your project, ready to ship.

Paste handoff URL  →  MCP fetches, extracts, summarizes the README,
                      and deploys files into your repo. One tool call.

Why

Claude Design (Anthropic Labs, launched 2026-04-17) exports designs as handoff URLs served from api.anthropic.com/v1/design/h/<hash>. Today, consuming them means: download tar, extract, read README, figure out what to copy where. This MCP makes that one step in any agentic IDE.

• Status: community project. Not affiliated with Anthropic.

• Scope: wraps the publicly-served handoff bundle format. No scraping, no undocumented endpoints beyond the published handoff URL, no claude.ai session spoofing.

Tools exposed

Install

npm install -g @kiwuuu/claude-handoff-mcp

Use in Claude Code

Add to your MCP config (~/.claude.json or wherever your client reads MCP servers):

{
  "mcpServers": {
    "claude-handoff": {
      "command": "npx",
      "args": ["-y", "@kiwuuu/claude-handoff-mcp"]
    }
  }
}

Then in chat:

Fetch https://api.anthropic.com/v1/design/h/abc123 and deploy it into ./public/

Use in Cursor / Cline / Windsurf

Same config shape — point at the npx entry. See each client's MCP docs for the exact file.

Use the CLI directly

npx claude-handoff one-shot https://api.anthropic.com/v1/design/h/abc123 ./my-app/public

Caveats

• Handoff URLs expire. They have a TTL and may be single-use. The Share-menu export is the only way to get a fresh URL — there is no public listing endpoint. If fetch_handoff returns HTTP 404, the URL has aged out; re-export from claude.ai/design.

• No API key used. This tool calls only the public handoff URL. It does not require ANTHROPIC_API_KEY.

• Format stability. The bundle format is observed, not specified. If Anthropic changes it, this tool adapts or pauses.

Contributing

Issues + PRs welcome. The core fetch/extract/deploy logic is <400 LOC in src/core.ts — easy to read, easy to fork.

License

MIT. See LICENSE.