# SRS Residual Gas Analyzer (pypi · labmcp-srs-rga)

MCP server for SRS RGA100/200/300 residual gas analyzers.

- Trust score: 83/100 (high trust)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-30

## Components

- pypi · `labmcp-srs-rga`: 83/100 (this document), [markdown](https://verifymcp.io/servers/k-dense-ai-labmcp-srs-rga/labmcp-srs-rga.md), [page](https://verifymcp.io/servers/k-dense-ai-labmcp-srs-rga/labmcp-srs-rga)

## Channel facts

- Registry: `pypi`
- Package: `labmcp-srs-rga`
- Version: `0.1.1`
- 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**: 99/100
  - No malware found by supply-chain analysis.
  - 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**: 75/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 2452 tokens (~136/item across 18 items; 18 tools + 0 resources), over budget; trim descriptions and params.
  - 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**: 99/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 97% 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 18 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 19 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 SRS Residual Gas Analyzer MCP server?

SRS Residual Gas Analyzer runs locally as a PyPI package, launched with uvx labmcp-srs-rga. 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-srs-rga -- uvx labmcp-srs-rga
```

### Cursor

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

### VS Code

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

### Codex

```bash
codex mcp add k-dense-ai-labmcp-srs-rga -- uvx labmcp-srs-rga
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add k-dense-ai-labmcp-srs-rga --command uvx --arg labmcp-srs-rga
```

### Hermes

```yaml
mcp_servers:
  k-dense-ai-labmcp-srs-rga:
    command: "uvx"
    args: ["labmcp-srs-rga"]
```

### Netclaw

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

### Vellum

```bash
assistant mcp add k-dense-ai-labmcp-srs-rga -t stdio -c uvx -a labmcp-srs-rga
```

### Other

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

## 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.

### 2026-09-30 (score 83, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-29 (score 68, −14)

- [security regression] Malware scan: pass → unverified

### 2026-09-28 (score 82, +43)

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

### 2026-09-27 (score 39, −17)

- [security regression] Tool safety: pass → unverified
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet.
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified
- [functional] Package version: 0.1.0 → 0.1.1

### 2026-09-26 (score 56)

First indexed and scored.

## MCP tools (18)

### `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).

### `get_status` (~83 tokens)

Get Status

Report the RGA state: filament emission, CDEM on/off and voltage, ionizer settings, scan
settings, stored sensitivity factors, and the decoded error bytes (e.g. FL6 when the
overpressure protection shut the filament down). Reading the error bytes clears the
communication (EC?) and CDEM (EM?) error bytes, as on the instrument.

Output parameters:

- `cdem_gain`: Stored CDEM gain (MG), used to scale CDEM currents
- `cdem_installed` (boolean)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `degas`: Degas cycle progress or last result, if any
- `electron_energy_ev` (integer)
- `emission_current_ma` (number)
- `errors` (object): Decoded error bytes; empty when everything is OK
- `filament_on` (boolean)
- `firmware` (string)
- `focus_voltage_v` (integer): Magnitude of the (negative) focus plate voltage
- `ion_energy_ev` (integer): 8 (low) or 12 (high)
- `max_mass_amu` (integer)
- `model` (string)
- `noise_floor` (integer): 0 (slowest, lowest noise) to 7 (fastest)
- `partial_sensitivity_ma_per_torr` (number): SP, N2 sensitivity stored in the head
- `points_per_amu` (integer)
- `scan_ms_per_amu` (number)
- `scan_start_mass` (integer)
- `scan_stop_mass` (integer)
- `serial` (string)
- `single_mass_ms` (number)
- `status_byte` (integer)
- `timestamp` (string)
- `total_sensitivity_ma_per_torr` (number): ST, stored in the head

### `read_total_pressure` (~71 tokens)

Read Total Pressure

Measure the total pressure with the RGA acting as an ionisation gauge (TP?, Faraday cup).
Needs the filament on and the CDEM off. The value is N2-equivalent and can differ from a
Bayard-Alpert gauge by a factor of a few, depending on the gas composition.

Output parameters:

- `filament_on` (boolean)
- `ion_current_a` (number)
- `notes` (array)
- `pressure_torr` (number): N2-equivalent total pressure (ion current / ST)
- `timestamp` (string)

### `measure_masses` (~97 tokens)

Measure Masses

Measure partial pressures at a list of m/z values (peak-locked single-mass measurements,
MR). Fast and precise for monitoring known gases; the precision and time per mass are set by
the noise floor (`set_scan_parameters`). Pressures are N2-equivalent.

Input parameters:

- `masses` (array, required): m/z values to measure, e.g. [2, 18, 28, 32, 40, 44]

Output parameters:

- `detector` (string)
- `noise_floor` (integer)
- `readings` (array)
- `timestamp` (string)
- `warnings` (array)

### `analog_scan` (~173 tokens)

Analog Scan

Record an analog mass spectrum (SC1): the quadrupole steps through the mass range and the
full peak shapes are returned (downsampled) with a peak list, the total pressure measured at
the end of the scan, and optionally the full data as CSV. Use it to check peak positions and
to survey unknown gases. Duration depends on the noise floor (e.g. 126 ms/amu at NF4). An
existing save_path file is never overwritten.

Input parameters:

- `max_points` (integer): Spectrum points returned
- `points_per_amu` (integer): Steps per amu (SA)
- `save_path`: Optional CSV path for the full spectrum (must not exist yet)
- `start_mass` (integer): First m/z
- `stop_mass` (integer): Last m/z

Output parameters:

- `detector` (string)
- `duration_s` (number)
- `kind` (string)
- `mz` (array): Mass axis (downsampled to max_points)
- `noise_floor` (integer)
- `partial_pressure_torr` (array): N2-equivalent partial pressure (downsampled)
- `peaks` (array): Peaks above the noise, strongest first
- `points_per_amu` (integer)
- `saved_to`
- `start_mass` (integer)
- `stop_mass` (integer)
- `sum_partial_pressures_torr` (number)
- `timestamp` (string)
- `total_points` (integer)
- `total_pressure_torr`: Measured at the end of the scan (null with CDEM)
- `warnings` (array)

### `histogram_scan` (~85 tokens)

Histogram Scan

Record a bar-graph spectrum (HS1): one peak-locked value per integer m/z plus the total
pressure. Faster than an analog scan and the usual way to follow a residual gas composition.

Input parameters:

- `save_path`: Optional CSV path (must not exist yet)
- `start_mass` (integer): First m/z
- `stop_mass` (integer): Last m/z

Output parameters:

- `detector` (string)
- `duration_s` (number)
- `kind` (string)
- `mz` (array): Mass axis (downsampled to max_points)
- `noise_floor` (integer)
- `partial_pressure_torr` (array): N2-equivalent partial pressure (downsampled)
- `peaks` (array): Peaks above the noise, strongest first
- `points_per_amu` (integer)
- `saved_to`
- `start_mass` (integer)
- `stop_mass` (integer)
- `sum_partial_pressures_torr` (number)
- `timestamp` (string)
- `total_points` (integer)
- `total_pressure_torr`: Measured at the end of the scan (null with CDEM)
- `warnings` (array)

### `leak_check` (~191 tokens)

Leak Check

Helium leak check: monitor m/z 4 while someone sprays helium on suspect joints, and report
the baseline, every response above `threshold_factor` x baseline (start/end time, peak) and
the time series. Keep the first few seconds free of helium so the baseline is clean. The
response time of a real leak is a few seconds. Bounded by `max_leak_check_duration_s`.

Input parameters:

- `baseline_points` (integer): Readings used for the baseline
- `duration_s` (number): How long to monitor
- `interval_s` (number): Seconds between readings
- `max_points` (integer): Points returned
- `mz` (integer): Tracer gas m/z (4 = helium)
- `save_path`: Optional CSV file for every reading (must not exist yet)
- `threshold_factor` (number): Signal/baseline ratio that counts as a leak response

Output parameters:

- `baseline_noise_torr` (number)
- `baseline_torr` (number): Median of the first readings (before spraying)
- `count` (integer)
- `duration_s` (number)
- `events` (array)
- `helium_note` (string)
- `interval_s` (number)
- `leak_detected` (boolean)
- `max_torr` (number)
- `mz` (integer)
- `partial_pressure_torr` (array): He-uncorrected (N2-equivalent) values, downsampled
- `saved_to`
- `started` (string)
- `threshold_torr` (number)
- `times_s` (array): Seconds since start (downsampled)

### `identify_residual_gases` (~130 tokens)

Identify Residual Gases

Run a histogram scan and assign the major peaks to likely gases with a simple lookup of
standard 70 eV fragment patterns: H2 (2), He (4), CH4 (16/15), H2O (18/17), N2 or CO (28,
split with 14 and 12), O2 (32), Ar (40), CO2 (44), plus diagnoses such as an air leak or
hydrocarbon contamination. A screening aid, not a quantitative analysis.

Input parameters:

- `stop_mass` (integer): Scan m/z 1 up to this mass

Output parameters:

- `caveats` (array)
- `diagnosis` (array)
- `species` (array)
- `spectrum_torr` (object): m/z -> N2-equivalent partial pressure used
- `timestamp` (string)
- `unassigned_peaks` (array)

### `set_scan_parameters` (~172 tokens)

Set Scan Parameters

Change measurement settings: noise floor (speed vs detection limit), electron energy, ion
energy, focus plate voltage and analog-scan resolution. Sensitivity factors stored in the head
are only valid at the default ionizer settings (70 eV, 12 eV, 90 V). After changing the noise
floor the detector zero is re-adjusted automatically at the start of the next scan.

Input parameters:

- `electron_energy_ev`: Default 70 eV
- `focus_voltage_v`: Focus plate, default 90 V
- `ion_energy`: low = 8 eV, high = 12 eV
- `noise_floor`: 0 = slowest/lowest noise ... 7 = fastest (default 4)
- `points_per_amu`: Analog scan steps per amu

Output parameters:

- `cdem_gain`: Stored CDEM gain (MG), used to scale CDEM currents
- `cdem_installed` (boolean)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `degas`: Degas cycle progress or last result, if any
- `electron_energy_ev` (integer)
- `emission_current_ma` (number)
- `errors` (object): Decoded error bytes; empty when everything is OK
- `filament_on` (boolean)
- `firmware` (string)
- `focus_voltage_v` (integer): Magnitude of the (negative) focus plate voltage
- `ion_energy_ev` (integer): 8 (low) or 12 (high)
- `max_mass_amu` (integer)
- `model` (string)
- `noise_floor` (integer): 0 (slowest, lowest noise) to 7 (fastest)
- `partial_sensitivity_ma_per_torr` (number): SP, N2 sensitivity stored in the head
- `points_per_amu` (integer)
- `scan_ms_per_amu` (number)
- `scan_start_mass` (integer)
- `scan_stop_mass` (integer)
- `serial` (string)
- `single_mass_ms` (number)
- `status_byte` (integer)
- `timestamp` (string)
- `total_sensitivity_ma_per_torr` (number): ST, stored in the head

### `set_filament` (~153 tokens)

Set Filament

Switch the filament on (or change its emission current). The filament burns out or is
damaged above 1e-4 Torr, so this is refused unless the pressure is below
\`max_filament_pressure_torr`: pass `external_pressure_torr` from a separate gauge, or, if the
filament is already on, the RGA's own total pressure is measured. The RGA's protection will
also shut the filament down on overpressure (reported as FL6).

Input parameters:

- `emission_current_ma` (number): Electron emission current; 1.0 mA is the standard setting
- `external_pressure_torr`: Pressure just read on a separate vacuum gauge, confirmed by the user

Output parameters:

- `action` (string)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `emission_current_ma` (number)
- `filament_on` (boolean)
- `message` (string)
- `pressure_evidence`
- `status_byte` (integer)
- `timestamp` (string)

### `set_cdem` (~166 tokens)

Set Cdem

Switch the electron multiplier (CDEM) on at a given high voltage for ~100-10000x more
signal. High pressure shortens CDEM life and can destroy it, so this is refused unless the
pressure is below `max_cdem_pressure_torr` (RGA total pressure measured now with the Faraday
cup, a recent one, or `external_pressure_torr`), and the voltage is capped by
\`max_cdem_voltage_v`. Total-pressure readings are disabled while the CDEM is on.

Input parameters:

- `external_pressure_torr`: Pressure just read on a separate vacuum gauge, confirmed by the user
- `voltage_v` (integer): CDEM high voltage (magnitude); typical 1000-1600 V, default 1400

Output parameters:

- `action` (string)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `emission_current_ma` (number)
- `filament_on` (boolean)
- `message` (string)
- `pressure_evidence`
- `status_byte` (integer)
- `timestamp` (string)

### `degas` (~153 tokens)

Degas

Start an ionizer degas (DG): 20 mA of 400 eV electrons clean the ion source by electron
stimulated desorption. The CDEM is switched off and left off. Degassing shortens filament
life; prefer a bakeout. Refused above `max_filament_pressure_torr` and beyond
\`max_degas_minutes`. Returns immediately; the RGA is busy until it finishes (any command would
abort it), and `filament_off` / `all_off` stop it.

Input parameters:

- `external_pressure_torr`: Pressure just read on a separate vacuum gauge, confirmed by the user
- `minutes` (integer): Degas time incl. the 1-minute ramp

Output parameters:

- `action` (string)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `emission_current_ma` (number)
- `filament_on` (boolean)
- `message` (string)
- `pressure_evidence`
- `status_byte` (integer)
- `timestamp` (string)

### `calibrate` (~112 tokens)

Calibrate

Calibrate the detector: `zero` (CA) re-zeroes the ion detector at the present noise floor
and detector and corrects the RF scan table for temperature drift (seconds); `electrometer`
(CL) recalibrates the electrometer's full I-V response (longer, clears all zero offsets). The
quadrupole RF is switched off at the end.

Input parameters:

- `kind` (string): zero = CA (re-zero detector + mass axis correction); electrometer = CL (full I-V)

Output parameters:

- `action` (string)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `emission_current_ma` (number)
- `filament_on` (boolean)
- `message` (string)
- `pressure_evidence`
- `status_byte` (integer)
- `timestamp` (string)

### `filament_off` (~42 tokens)

Filament Off

Switch the filament off (FL0), stopping a degas first if one is running. Always allowed,
and it interrupts a running scan, mass measurement or leak check.

Output parameters:

- `action` (string)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `emission_current_ma` (number)
- `filament_on` (boolean)
- `message` (string)
- `pressure_evidence`
- `status_byte` (integer)
- `timestamp` (string)

### `cdem_off` (~44 tokens)

Cdem Off

Switch the electron multiplier off (HV0) and return to Faraday-cup detection. Always
allowed, and it interrupts a running scan, mass measurement or leak check.

Output parameters:

- `action` (string)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `emission_current_ma` (number)
- `filament_on` (boolean)
- `message` (string)
- `pressure_evidence`
- `status_byte` (integer)
- `timestamp` (string)

### `all_off` (~82 tokens)

All Off

Put the RGA in a safe state: abort any degas, CDEM off (HV0), filament off (FL0)
and quadrupole RF/DC off (MR0). Use when finished, before venting, or if anything looks wrong.
It interrupts a running scan or leak check, and every step is attempted even if an earlier
one fails.

Output parameters:

- `action` (string)
- `cdem_on` (boolean)
- `cdem_voltage_v` (number)
- `emission_current_ma` (number)
- `filament_on` (boolean)
- `message` (string)
- `pressure_evidence`
- `status_byte` (integer)
- `timestamp` (string)

## Diagnostics

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

## Score history

- 2026-09-30: 83
- 2026-09-29: 68
- 2026-09-28: 82
- 2026-09-27: 39
- 2026-09-26: 56

## Common questions

### What is the SRS Residual Gas Analyzer MCP server?

SRS Residual Gas Analyzer is an MCP server listed in the public MCP registry as io.github.K-Dense-AI/labmcp-srs-rga. MCP server for SRS RGA100/200/300 residual gas analyzers. This page covers its PyPI package (labmcp-srs-rga).

### Is the SRS Residual Gas Analyzer MCP server safe to use?

SRS Residual Gas Analyzer scores 83 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 SRS Residual Gas Analyzer MCP server expose?

SRS Residual Gas Analyzer exposes 18 tools: get_connection_info, get_command_log, reconnect, get_status, read_total_pressure, and 13 more. Their descriptions and schemas cost roughly 1,875 tokens of context every time the server is loaded.

### Is the SRS Residual Gas Analyzer MCP server still maintained?

SRS Residual Gas Analyzer 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 SRS Residual Gas Analyzer MCP server under?

SRS Residual Gas Analyzer 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-srs-rga/
- Socket report: https://socket.dev/pypi/package/labmcp-srs-rga
- Repository: https://github.com/K-Dense-AI/lab-instrument-mcps
- Website: https://github.com/K-Dense-AI/lab-instrument-mcps/tree/main/servers/physics/srs-rga
- Changelog RSS feed: https://verifymcp.io/servers/k-dense-ai-labmcp-srs-rga/labmcp-srs-rga.xml
- Changelog JSON feed: https://verifymcp.io/servers/k-dense-ai-labmcp-srs-rga/labmcp-srs-rga.json
- HTML version of this page: https://verifymcp.io/servers/k-dense-ai-labmcp-srs-rga/labmcp-srs-rga