JULABO Circulator MCP Server

Let an AI agent run JULABO heating and refrigerated circulators through JULABO's documented interface commands: read the bath and external temperatures and the heating/cooling power, set the setpoint, start and stop temperature control, decode status and alarm messages, and wait until the bath is stable at temperature. Its 10 documented tools cover setpoint, circulation.

People who work with setpoint and circulation and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

One of 32 MCP servers published from k-dense-ai/lab-instrument-mcps. Stars and repository activity are shared across all of them. See all 32 →

VERIFIED ACTIVE

LAST COMMIT 2026-09-26 · VERIFIED 2026-09-30

Apache-2.0 · Python servers · how we verify → /methodology

01 · Install JULABO Circulator

Claude Code

claude mcp add k-dense-ai-lab-instrument-mcps-servers-c -- uvx labmcp-julabo

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "k-dense-ai-lab-instrument-mcps-servers-c": {
      "command": "uvx",
      "args": [
        "labmcp-julabo"
      ]
    }
  }
}

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

repo age created 2026-09-25 - young repo, little track record yet

license Apache-2.0 - declared in the repository

pypi package labmcp-julabo - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.K-Dense-AI is GitHub-verified and matches the repo owner

03 · What JULABO Circulator can do

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

What you can build

Capability map

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

read & search

4 tools - e.g. Return the most recent raw commands sent to / replies received from the instrument (newest last). Useful for debugging and for recording what was done.; Report which instrument is connected (identity…

get_command_log · get_connection_info · get_status · read_temperatures

Setpoint

2 tools - e.g. Read the current temperature setpoint and whether temperature control is running.; Set the circulator's temperature setpoint (out_sp_00). If temperature control is running, the circulator starts heating…

get_setpoint · set_setpoint

Circulation

2 tools - e.g. Start temperature control (out_mode_05 1): the pump runs and the bath heats or cools to the setpoint, which is checked against the safety limits first (it may h; Stop temperature control and the pump…

start_circulation · stop_circulation

Reconnect

1 tool - e.g. Close and re-open the connection to the instrument (e.g. after it was power cycled or a cable was re-plugged).

reconnect

Wait

1 tool - e.g. Poll the bath (or external) temperature until it has been within tolerance_c of the target for stable_for_s seconds, or timeout_s passes. Does not change anythi

wait_for_temperature

Limitations (from the README)

- Remote control is a front-panel setting. In manual mode (00 MANUAL STOP / 01 MANUAL START) the server refuses to send settings and tells you how to enable remote control. - Every setting is verified. OUT commands have no reply, so after each one the server queries status (to catch -08 INVALID COMMAND, -09 COMMAND NOT ALLOWED IN CURRENT OPERATING MODE, -10 VALUE TOO SMALL, -11 VALUE TOO LARGE, -13 VALUE EXCEEDS TEMP

04 · Who maintains JULABO Circulator

JULABO Circulator is maintained by k-dense-ai. We track 32 MCP servers from k-dense-ai - 32 actively maintained, 9 combined GitHub stars, oldest repo from Sep 2026. Full record: all servers from k-dense-ai.

05 · Facts

repository: github.com/k-dense-ai/lab-instrument-mcps
website: https://github.com/K-Dense-AI/lab-instrument-mcps/tree/main/servers/chemistry/julabo-circulator
category: other - actively maintained as of 2026-09-30.
registry: io.github.K-Dense-AI/labmcp-julabo (active, first published 2026-09-26 · 3 versions)
packages: pypi:labmcp-julabo

06 · JULABO Circulator FAQ

Is JULABO Circulator still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-26. We re-verify nightly.

What can JULABO Circulator do?

How do I install JULABO Circulator?

Run `uvx labmcp-julabo`. You can also paste the ready-made client config above.

Does JULABO Circulator run locally?

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

07 · Alternatives to JULABO Circulator

Alternatives to JULABO Circulator

Maintained other servers if JULABO Circulator isn't the fit.

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