Leica LASAF CAM server (leicacam.CAM) — device market

Install

Three ways to run this device. Each one serves its fake backend: no instrument, no simulator install and no upstream checkout.

OpenAI4S (one command)

shell

openai4s lab add labs/martinhjelmare__leicacam

Installs the device into the OpenAI4S Lab on its fake backend and starts it. First time? See setup below.

Or, in the workbench, open the Lab tab → Market → Install.

Standalone MHS endpoint

shell

git clone --depth 1 https://github.com/PKU-YuanGroup/OpenMHS.git && cd OpenMHS
PYTHONPATH=MHS/sdk/src python3 -m mhs serve labs/martinhjelmare__leicacam --port 7400
# in a second terminal, from the same directory:
PYTHONPATH=MHS/sdk/src python3 -m mhs describe --endpoint http://127.0.0.1:7400

Serves the device as an MHS endpoint on port 7400 from an OpenMHS clone (Python 3.10 or later, standard library only); describe prints what it offers.

Any MCP host (Claude Desktop, Cursor, …)

mcp configuration

{
  "mcpServers": {
    "leicacam": {
      "command": "python3",
      "args": [
        "-m",
        "mhs",
        "serve",
        "labs/martinhjelmare__leicacam",
        "--mcp"
      ],
      "env": {
        "PYTHONPATH": "/path/to/OpenMHS/MHS/sdk/src"
      }
    }
  }
}

Add this server to the host's MCP configuration and replace /path/to/OpenMHS with the path of your OpenMHS clone. The host starts the server and talks to it on stdin and stdout.

What it does

Measures

stage_information

Adjusts

Nothing declared.

Actions

start_matrix_scan: Start the matrix scan (the CAM startscan command)
stop_matrix_scan: Stop the matrix scan (the CAM stopscan command), the safe state of the scan
pause_matrix_scan: Toggle the pause of the matrix scan (the CAM pausescan command)
autofocus_scan: Start the matrix focus scan (the CAM autofocusscan command)
enable_scan_field: Enable one scan field of the experiment matrix (the CAM enable command with value true)
disable_scan_field: Disable one scan field of the experiment matrix (the CAM enable command with value false)
enable_all_scan_fields: Enable every scan field of the experiment matrix (the CAM enableall command with value true)
disable_all_scan_fields: Disable every scan field of the experiment matrix (the CAM enableall command with value false)

Names as the driver declares them. Units, limits and the safety declaration are in the package's REFERENCE.md.

First-time setup

The OpenAI4S workbench with the OpenMHS lab, from a source checkout:

shell

# OpenAI4S workbench with the OpenMHS lab (source checkout)
git clone --recursive https://github.com/PKU-YuanGroup/OpenAI4S.git
cd OpenAI4S && ./setup.sh && source .venv/bin/activate
openai4s lab add labs/martinhjelmare__leicacam
openai4s serve        # open the Lab tab

The standalone endpoint and the MCP server need only an OpenMHS clone and Python 3.10 or later. More in the market's getting-started guide and on the OpenAI4S host page.

Source and evidence

Upstream: martinhjelmare/leicacam
Pinned commit: 5c33a0d6daa1
Licence: MIT
Stars: 22
Evidence: contract_checked on the fake backend
Backends: fake, hardware

The driver package MHS/drivers/labs/martinhjelmare__leicacam wraps the upstream code at the pinned commit. Its REFERENCE.md documents the full contract: every value, action, unit, limit and the safety declaration.