# Pfeiffer Vacuum Gauge Controller (pypi · labmcp-pfeiffer-tpg)

MCP server for Pfeiffer Vacuum TPG 361/362/366 and TPG 261/262 gauge controllers.

- Trust score: 68/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-30

## Components

- pypi · `labmcp-pfeiffer-tpg`: 68/100 (this document), [markdown](https://verifymcp.io/servers/k-dense-ai-labmcp-pfeiffer-tpg/labmcp-pfeiffer-tpg.md), [page](https://verifymcp.io/servers/k-dense-ai-labmcp-pfeiffer-tpg/labmcp-pfeiffer-tpg)

## Channel facts

- Registry: `pypi`
- Package: `labmcp-pfeiffer-tpg`
- Version: `0.1.2`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-30.

- **Supply Chain Security**: 49/100
  - Malware scan not yet available for this package.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs hatchling.build at install time, a recognised build step with no custom scripting around it.
  - 2 of 17 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 100/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to K-Dense-AI/lab-instrument-mcps).
  - Clear OSI-approved license (Apache-2.0).
  - Actively maintained (last published 3 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 78/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 1087 tokens (~98/item across 11 items; 11 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 13/100
  - Stability observed for 4 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 98/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 92% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 11 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the Pfeiffer Vacuum Gauge Controller MCP server?

Pfeiffer Vacuum Gauge Controller runs locally as a PyPI package, launched with uvx labmcp-pfeiffer-tpg. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add k-dense-ai-labmcp-pfeiffer-tpg -- uvx labmcp-pfeiffer-tpg
```

### Cursor

```json
{
  "mcpServers": {
    "k-dense-ai-labmcp-pfeiffer-tpg": {
      "command": "uvx",
      "args": [
        "labmcp-pfeiffer-tpg"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "k-dense-ai-labmcp-pfeiffer-tpg": {
      "command": "uvx",
      "args": [
        "labmcp-pfeiffer-tpg"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add k-dense-ai-labmcp-pfeiffer-tpg -- uvx labmcp-pfeiffer-tpg
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "k-dense-ai-labmcp-pfeiffer-tpg": {
      "type": "local",
      "command": [
        "uvx",
        "labmcp-pfeiffer-tpg"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add k-dense-ai-labmcp-pfeiffer-tpg --command uvx --arg labmcp-pfeiffer-tpg
```

### Hermes

```yaml
mcp_servers:
  k-dense-ai-labmcp-pfeiffer-tpg:
    command: "uvx"
    args: ["labmcp-pfeiffer-tpg"]
```

### Netclaw

```json
{
  "McpServers": {
    "k-dense-ai-labmcp-pfeiffer-tpg": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "labmcp-pfeiffer-tpg"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add k-dense-ai-labmcp-pfeiffer-tpg -t stdio -c uvx -a labmcp-pfeiffer-tpg
```

### Other

```json
{
  "mcpServers": {
    "k-dense-ai-labmcp-pfeiffer-tpg": {
      "command": "uvx",
      "args": [
        "labmcp-pfeiffer-tpg"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-28 (score 68, −4)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-27 (score 72, +1)

- [functional improvement] Stability: unverified → 0.03
- [functional] Package version: 0.1.1 → 0.1.2

### 2026-09-26 (score 71)

First indexed and scored.

## MCP tools (11)

### `get_connection_info` (~40 tokens)

Get Connection Info

Report which instrument is connected (identity, address, simulated or real),
whether the server is read-only, and the active safety limits. Call this first.

### `get_command_log` (~46 tokens)

Get Command Log

Return the most recent raw commands sent to / replies received from the
instrument (newest last). Useful for debugging and for recording what was done.

Input parameters:

- `limit` (integer)

Output parameters:

- `result` (array)

### `reconnect` (~35 tokens)

Reconnect

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

### `read_pressure` (~39 tokens)

Read Pressure

Read one gauge channel: status, pressure in the display unit and in mbar.

Input parameters:

- `channel` (integer): Measurement channel (gauge) number

Output parameters:

- `channel` (integer)
- `pressure`: Pressure in `unit`; null unless status is ok
- `pressure_mbar`: Pressure converted to mbar (null for V or invalid)
- `raw_value` (number): Value sent by the controller (range limit when under/overrange)
- `status` (string): ok, underrange, overrange, sensor error, sensor off, no sensor, ...
- `timestamp` (string)
- `unit` (string): Controller display unit: mbar, hPa, Pa, Torr, micron or V

### `read_all_pressures` (~27 tokens)

Read All Pressures

Read every channel of the controller at once (PRX), with status per channel.

Output parameters:

- `readings` (array)
- `timestamp` (string)
- `unit` (string)

### `get_gauge_types` (~46 tokens)

Get Gauge Types

List the gauge connected to each channel (TID), what kind it is, and whether it is an
ionisation gauge that is currently switched on or off (SEN).

Output parameters:

- `result` (array)

### `get_errors` (~41 tokens)

Get Errors

Read (and clear) the controller's ERROR word: controller error, no hardware, inadmissible
parameter or syntax error. An empty list means no error.

### `log_pressure_series` (~155 tokens)

Log Pressure Series

Log pressures at a fixed interval (e.g. a pump-down curve, leak-up/rate-of-rise test or
bake-out). Returns per-channel statistics in log-space plus a downsampled series; the full
series can be written to a new CSV file (an existing file is never overwritten). Bounded by
\`max_log_duration_s` and 2 h per call.

Input parameters:

- `channels`: Channels to include (default: all)
- `duration_s` (number): How long to log (at most 2 h per call)
- `interval_s` (number): Seconds between readings
- `max_points` (integer): Points returned per channel
- `save_path`: Optional CSV file for every reading

Output parameters:

- `channels` (array)
- `count` (integer)
- `duration_s` (number)
- `interval_s` (number)
- `pressures_mbar` (object): Channel -> mbar values (downsampled)
- `saved_to`
- `started` (string)
- `stats` (array)
- `times_s` (array): Seconds since start (downsampled to max_points)

### `set_unit` (~59 tokens)

Set Unit

Change the pressure unit used on the display and interface (UNI). Readings in mbar are
always included regardless of this setting.

Input parameters:

- `unit` (string, required): Display/interface unit (TPG 26x: mbar, Pa or Torr only)

### `set_gauge_power` (~160 tokens)

Set Gauge Power

Switch an ionisation gauge (IKR, PKR, PBR, IMR) on or off (SEN). Switching a hot or cold
cathode gauge on at high pressure can burn out the filament or contaminate the gauge, so
switching ON is refused unless a valid reading from this gauge or `reference_channel` is at or
below `max_switch_on_pressure_mbar`. Switching off may trip setpoint relays used as interlocks.

Input parameters:

- `channel` (integer, required): Channel of the ionisation gauge
- `on` (boolean, required): True = switch the gauge on, False = off
- `reference_channel`: Another gauge on the same vacuum (e.g. a Pirani) used to check the pressure

Output parameters:

- `result` (array)

### `switch_gauge_off` (~65 tokens)

Switch Gauge Off

Switch an ionisation gauge off (e.g. before venting, or if the pressure is rising). Always
allowed. Note that setpoint relays assigned to this channel may change state.

Input parameters:

- `channel` (integer, required): Channel of the ionisation gauge to switch off

Output parameters:

- `result` (array)

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/k-dense-ai-labmcp-pfeiffer-tpg/labmcp-pfeiffer-tpg#diagnostics

## Score history

- 2026-09-30: 68
- 2026-09-29: 68
- 2026-09-28: 68
- 2026-09-27: 72
- 2026-09-26: 71

## Common questions

### What is the Pfeiffer Vacuum Gauge Controller MCP server?

Pfeiffer Vacuum Gauge Controller is an MCP server listed in the public MCP registry as io.github.K-Dense-AI/labmcp-pfeiffer-tpg. MCP server for Pfeiffer Vacuum TPG 361/362/366 and TPG 261/262 gauge controllers. This page covers its PyPI package (labmcp-pfeiffer-tpg).

### Is the Pfeiffer Vacuum Gauge Controller MCP server safe to use?

Pfeiffer Vacuum Gauge Controller scores 68 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 30 September 2026. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Pfeiffer Vacuum Gauge Controller MCP server expose?

Pfeiffer Vacuum Gauge Controller exposes 11 tools: get_connection_info, get_command_log, reconnect, read_pressure, read_all_pressures, and 6 more. Their descriptions and schemas cost roughly 713 tokens of context every time the server is loaded.

### Is the Pfeiffer Vacuum Gauge Controller MCP server still maintained?

Pfeiffer Vacuum Gauge Controller is still listed as active in the MCP registry. We last reached this channel on 30 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the Pfeiffer Vacuum Gauge Controller MCP server under?

Pfeiffer Vacuum Gauge Controller declares the Apache-2.0 licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- PyPI project: https://pypi.org/project/labmcp-pfeiffer-tpg/
- Socket report: https://socket.dev/pypi/package/labmcp-pfeiffer-tpg
- Repository: https://github.com/K-Dense-AI/lab-instrument-mcps
- Website: https://github.com/K-Dense-AI/lab-instrument-mcps/tree/main/servers/physics/pfeiffer-vacuum-gauge
- Changelog RSS feed: https://verifymcp.io/servers/k-dense-ai-labmcp-pfeiffer-tpg/labmcp-pfeiffer-tpg.xml
- Changelog JSON feed: https://verifymcp.io/servers/k-dense-ai-labmcp-pfeiffer-tpg/labmcp-pfeiffer-tpg.json
- HTML version of this page: https://verifymcp.io/servers/k-dense-ai-labmcp-pfeiffer-tpg/labmcp-pfeiffer-tpg