FAQ

FAQ

General

What MATLAB versions are supported?

MATLAB 2020b and later. The MATLAB Engine API for Python must be installed separately from your MATLAB installation.

Does it work without MATLAB installed?

No. The server requires a local MATLAB installation with the Engine API. It connects to real MATLAB engines, not a simulator.

Can I use it with MATLAB Online?

Not currently. The server connects to locally-installed MATLAB via the Engine API, which requires a local installation.

What AI agents work with this?

Any agent that supports the Model Context Protocol (MCP): Claude Desktop, Claude Code, Cursor, GitHub Copilot (with MCP support), and custom agents built with MCP SDKs.

Setup

How do I install the MATLAB Engine API?

cd /Applications/MATLAB_R2024a.app/extern/engines/python  # macOS
pip install .

Adjust the path for your MATLAB version and OS. See Installation for details.

stdio vs SSE — which should I use?

• stdio: Single user, simple setup. The AI agent launches the server process directly.
• SSE: Multiple users, shared server. Users connect over HTTP. Requires more setup but supports concurrent access.

Can I run the server remotely?

Yes, with SSE transport. Start the server on a remote machine and connect via HTTP. Always put it behind a reverse proxy with authentication for production use.

Usage

How does async execution work?

Code that finishes within sync_timeout (30s default) returns immediately. Longer code is automatically promoted to an async job — the agent gets a job_id and can poll for progress. See Async Jobs.

How do I report progress from long-running jobs?

Use the mcp_progress() helper in your MATLAB code:

mcp_progress(__mcp_job_id__, 50, 'Halfway done');

Can I use my own MATLAB functions?

Yes, two ways:

1. Custom tools (recommended): Define them in custom_tools.yaml and they become first-class MCP tools. See Custom Tools.
2. Path configuration: Add your function directories to workspace.default_paths in config, then call them via execute_code.

Are MATLAB plots interactive?

Yes! MATLAB figures are automatically converted to Plotly JSON, which renders as interactive charts in web-based clients. A static PNG is also generated as a fallback.

What plot types are supported for Plotly conversion?

Line, scatter, bar, histogram, surface, and image plots. Complex custom graphics may fall back to static PNG.

Performance

How many engines should I run?

• Personal use: 1-2 engines
• Small team (2-5 users): 2-4 engines
• Larger team: Scale based on concurrent usage, up to your MATLAB license limit

On macOS, MATLAB limits you to ~4 concurrent engines.

Will it slow down my MATLAB?

Each engine is an independent MATLAB process. Running multiple engines uses memory proportional to the number of engines (typically 500MB-2GB per engine depending on loaded toolboxes).

What happens when all engines are busy?

Requests queue up (configurable queue_max_size, default 50). If the pool hasn't reached max_engines, a new engine is started proactively. Requests are served FIFO as engines become available.

Security

Is it safe to expose over the network?

For SSE transport:

• Always put it behind an authenticating reverse proxy
• Set require_proxy_auth: true in config
• Bind to 127.0.0.1 if the proxy is on the same machine

Can agents run arbitrary system commands?

No. The security validator blocks system(), unix(), dos(), and ! by default. You can customize the blocklist. See Security.

Are user sessions isolated?

Yes. When workspace_isolation: true (default), the workspace is fully cleared between sessions: clear all; clear global; clear functions; fclose all; restoredefaultpath.

Development

How do I run tests?

pip install -e ".[dev]"
pytest tests/ -v

Tests use a mock MATLAB engine — no MATLAB installation needed for testing.

How do I add a new MCP tool?

1. Create the implementation in src/matlab_mcp/tools/
2. Register it in server.py with @mcp.tool
3. Add tests in tests/

Can I contribute?

Yes! Open an issue or PR on GitHub.