Composer MCP Server - install, status & alternatives [2026]

01 · Install Composer

Claude Code

claude mcp add olivergrabner-composer-mcp -- npx -y @usecomposer/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "olivergrabner-composer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@usecomposer/mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package @usecomposer/mcp - the @usecomposer scope differs from the repo owner (olivergrabner); confirm it's the project's official package

registry namespace io.github.OliverGrabner is GitHub-verified and matches the repo owner

03 · What Composer can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can list all your diagrams. Call this first to find which diagram to work on, create a new diagram and auto-select it for this session, select which diagram to work on for this session, and rename the currently selected diagram.

Capability map

Tools grouped from the project's README - what Composer lets an agent do.

read & search

4 tools - e.g. List all your diagrams. Call this first to find which diagram to work on; Get details for a single node including connected edges; Get a PNG thumbnail of the diagram from the last auto-save

list_diagrams · get_node · get_screenshot · get_guide

Diagram

4 tools - e.g. Create a new diagram and auto-select it for this session; Select which diagram to work on for this session; Rename the currently selected diagram

create_diagram · select_diagram · rename_diagram · verify_diagram

Graph

2 tools - e.g. Get the full architecture diagram - all nodes and edges; Search nodes and edges by keyword

get_graph · search_graph

Upsert

2 tools - e.g. Create or update a node (service, database, queue, etc.); Create or update a connection between two nodes

upsert_node · upsert_edge

Define

1 tool - e.g. Define API endpoints on a backend service node

define_api

delete

1 tool - e.g. Delete a node or edge from the diagram

delete_element

Link

1 tool - e.g. Link a node to a file or folder in your codebase

link_path

Plan

1 tool - e.g. Step-by-step workflow for importing an existing codebase

plan_import

04 · Who maintains Composer

composer is maintained by olivergrabner. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/olivergrabner/composer-mcp
category: coding agent - ranked #143 of 194 actively-maintained coding agent servers as of 2026-08-25.
registry: io.github.OliverGrabner/composer (active, first published 2026-04-09)
packages: npm:@usecomposer/mcp

06 · Composer FAQ

Is Composer still maintained?

Yes - as of 2026-08-25, its last commit was 2026-04-09. We re-verify nightly.

What can Composer do?

With this server connected, an agent can list all your diagrams. Call this first to find which diagram to work on, create a new diagram and auto-select it for this session, select which diagram to work on for this session, and rename the currently selected diagram.

How do I install Composer?

Run `npx -y @usecomposer/mcp`. You can also paste the ready-made client config above.

Does Composer run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Composer

Alternatives to Composer

Maintained coding agent servers if Composer isn't the fit.

Pairs well with

Servers that cover what Composer doesn't - only shown when the pairing reason fits the companion.

More coding agent MCP servers · Token Optimizer MCP · Mcacp · Task Graph MCP · Covenant Guard · Infrahub MCP

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