# LabJack T-series DAQ (pypi · labmcp-labjack)

MCP server for LabJack T4, T7/T7-Pro and T8 DAQ devices (LJM).

- Trust score: 65/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-30

## Components

- pypi · `labmcp-labjack`: 65/100 (this document), [markdown](https://verifymcp.io/servers/k-dense-ai-labmcp-labjack/labmcp-labjack.md), [page](https://verifymcp.io/servers/k-dense-ai-labmcp-labjack/labmcp-labjack)

## Channel facts

- Registry: `pypi`
- Package: `labmcp-labjack`
- Version: `0.1.3`
- 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**: 48/100
  - 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.
  - 3 of 18 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**: 69/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1982 tokens (~165/item across 12 items; 12 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 96/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 88% 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 12 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 13 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).

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the LabJack T-series DAQ MCP server?

LabJack T-series DAQ runs locally as a PyPI package, launched with uvx labmcp-labjack. 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-labjack -- uvx labmcp-labjack
```

### Cursor

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

### VS Code

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

### Codex

```bash
codex mcp add k-dense-ai-labmcp-labjack -- uvx labmcp-labjack
```

### opencode

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

### OpenClaw

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

### Hermes

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

### Netclaw

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

### Vellum

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

### Other

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

## 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 65, −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 69, 0)

- [functional] Package version: 0.1.2 → 0.1.3

### 2026-09-26 (score 69)

First indexed and scored.

## MCP tools (12)

### `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_device_info` (~56 tokens)

Get Device Info

Identify the connected LabJack (model, serial, firmware, connection) and list what it
offers: analog inputs, valid input ranges, resolution indices, DAC range, digital lines and
stream rate. Call this before configuring channels.

Output parameters:

- `analog_inputs` (array)
- `connection` (string)
- `dac_range_v` (array): [min, max] DAC output in V
- `dac_voltages_v` (array): Current DAC0, DAC1 settings in V
- `device_name`
- `digital_lines` (array)
- `firmware` (string)
- `hardware_version` (string)
- `input_ranges_v` (array): Valid ± input ranges in V (empty for the T4: fixed ranges)
- `ip_address`
- `max_resolution_index` (integer)
- `max_stream_samples_per_s` (number)
- `model` (string)
- `serial` (string)
- `thermocouple_supported` (boolean)
- `timestamp` (string)

### `read_analog_inputs` (~250 tokens)

Read Analog Inputs

Read one or more analog inputs once (command-response) and return volts.

Range and resolution settings persist on the device until changed. On the T8, several
channels are sampled simultaneously. Each reading reports what it was measured against
(GND or the negative input). Fails while a stream is running.

Input parameters:

- `channels` (array, required): AIN numbers, e.g. [0, 1, 2]
- `differential`: T7 only: true = measure AINn - AIN(n+1) for even n (e.g. AIN0-AIN1), false = single-ended, omit = keep the current setting
- `range_v`: ± input range in V for all listed channels (T7: 10/1/0.1/0.01; T8: 11 ... 0.018). Omit to keep the current range. Not settable on the T4.
- `resolution_index`: Higher = less noise, slower (T4 0-5, T7 0-8, T7-Pro 0-12, T8 0-16; 0 = default). Omit to keep.

Output parameters:

- `readings` (array)
- `simultaneous` (boolean): True if all channels were sampled at the same instant (T8)
- `timestamp` (string)

### `read_digital_inputs` (~104 tokens)

Read Digital Inputs

Report the logic level and direction (input/output/analog) of digital I/O lines.

Uses the DIO_STATE/DIO_DIRECTION bitmask registers, which never change a line's direction, so
it is safe to call while lines are driving equipment. Outputs report the level actually on the
terminal.

Input parameters:

- `lines`: Lines to report, e.g. ['FIO0', 'EIO3'] or ['DIO4']. Omit for all lines.

Output parameters:

- `lines` (array)
- `timestamp` (string)

### `read_device_temperature` (~60 tokens)

Read Device Temperature

Read the LabJack's internal temperature sensor (°C, about ±2 °C) and the estimated ambient
air temperature. On the T8 also returns the sensor next to each AIN terminal. Cannot be read
while a stream is running.

Output parameters:

- `ambient_estimate_c` (number): Estimated air temperature outside the enclosure
- `device_temperature_c` (number): Internal sensor (TEMPERATURE_DEVICE_K), ±2 °C
- `terminal_temperatures_c`: T8 only: sensor next to each AIN0-AIN7 terminal
- `timestamp` (string)

### `read_thermocouple` (~270 tokens)

Read Thermocouple

Read a thermocouple with the T7/T8 AIN thermocouple extended feature (types B, C, E, J, K,
N, R, S, T) and return °C with the measured voltage and cold-junction temperature.

This configures the AIN extended feature on the channel (the T7 switches a ±10 V range to
±0.1 V). A floating/open thermocouple returns valid=false. Accuracy is dominated by the CJC:
about ±2 °C with the internal sensor. Not available on the T4.

Input parameters:

- `channel` (integer, required): AIN the thermocouple + lead is on
- `cjc` (string): Cold-junction sensor: 'internal' (device sensor; best for T7 screw terminals / T8) or 'lm34' (LM34 on cjc_channel, e.g. on a CB37)
- `cjc_channel`: AIN of the LM34 when cjc='lm34'
- `differential` (boolean): T7 only: thermocouple between AINn (+) and AIN(n+1) (-); recommended on the CB37
- `resolution_index`: Omit for the device default
- `thermocouple_type` (string)

Output parameters:

- `channel` (string)
- `cjc_source` (string)
- `cjc_temperature_c` (number)
- `message`
- `temperature_c`: Hot-junction temperature; None if the reading is invalid
- `thermocouple_type` (string)
- `thermocouple_voltage_v` (number)
- `timestamp` (string)
- `valid` (boolean)

### `stream_analog` (~288 tokens)

Stream Analog

Acquire a hardware-timed waveform on one or more analog inputs (LJM stream mode) and return
per-channel statistics plus a downsampled waveform; optionally save everything to CSV.

Bounded by the `max_stream_duration_s` and `max_scan_rate_hz` limits and the device maximum
(T4 50 kS/s, T7 100 kS/s aggregate, T8 40 kscans/s). On the T8, list adjacent channels in
order; on the T7 the streamed inputs are set to single-ended. Blocks for `duration_s`;
\`set_outputs_safe` stops a running stream early.

Input parameters:

- `channels` (array, required): AIN numbers, e.g. [0, 1]
- `duration_s` (number): Acquisition time in seconds
- `max_points` (integer): Max points per channel in the returned waveform
- `range_v`: ± range in V for all channels (T7/T8); omit to keep
- `resolution_index`: Stream resolution index; omit for default
- `save_path`: Write the full-resolution data to this new .csv file (never overwritten)
- `scan_rate_hz` (number): Scans per second (one sample of every channel per scan). At least 1, so set_outputs_safe can stop the stream within a second; use read_analog_inputs for slower logging

Output parameters:

- `aborted` (boolean): True if set_outputs_safe stopped the stream early (the data covers the scans read)
- `channels` (array)
- `downsample_factor` (integer): Scans per min/max pair (1 = every scan returned)
- `duration_s` (number)
- `requested_scan_rate_hz` (number)
- `saved_to`: Absolute path of the full-resolution CSV, if requested
- `scan_rate_hz` (number): Actual scan rate the device ran at
- `scans` (integer)
- `skipped_scans` (integer): Scans lost to buffer overflow (null in the waveform, empty in the CSV)
- `stats` (array)
- `time_s` (array): Time of each returned (downsampled) point from the first scan
- `timestamp` (string)
- `waveforms_v` (object): Downsampled waveform per channel. Each block of downsample_factor scans contributes its minimum and maximum in time order (placed at the block's first and last scan time), so spikes are kept

### `write_dac` (~156 tokens)

Write Dac

Set an analog output (DAC0/DAC1) to a DC voltage. The output stays at this value until
changed or `set_outputs_safe` is called.

This energises whatever is wired to the DAC (a heater driver, valve, laser or motor
controller input). Checked against `max_dac_voltage_v` and the model's hardware range before
anything is sent. The DAC can source about 20 mA through 50 Ohm; loads pull the voltage down.

Input parameters:

- `dac` (integer, required): 0 for DAC0, 1 for DAC1
- `voltage_v` (number, required): Output voltage (T4/T7: 0-5 V, T8: 0-10 V)

Output parameters:

- `dac` (string)
- `readback_v` (number)
- `requested_v` (number)
- `timestamp` (string)

### `set_digital_output` (~115 tokens)

Set Digital Output

Make a digital line an output and drive it high (3.3 V) or low (0 V).

Digital outputs often switch relays, solid-state relays, valves or instrument trigger inputs,
so confirm with the user what the line controls. The line keeps driving until changed or
released with `set_outputs_safe`.

Input parameters:

- `level` (string, required)
- `line` (string, required): Digital line, e.g. 'FIO0', 'EIO2', 'CIO1' or 'DIO5'

Output parameters:

- `level` (string)
- `line` (string)
- `timestamp` (string)

### `set_outputs_safe` (~112 tokens)

Set Outputs Safe

Put the outputs in a safe state: stop any stream, set DAC0 and DAC1 to 0 V, and release
every digital line this server drove (plus the `safe_dio` option lines) to input - or drive
them low with dio_mode='low'. Use when finished or if anything looks wrong.

Input parameters:

- `dio_mode` (string): 'input' (default) returns lines to the power-up state (input with pull-up); 'low' drives them to 0 V instead

Output parameters:

- `actions` (array)
- `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-labjack/labmcp-labjack#diagnostics

## Score history

- 2026-09-30: 65
- 2026-09-29: 65
- 2026-09-28: 65
- 2026-09-27: 69
- 2026-09-26: 69

## Common questions

### What is the LabJack T-series DAQ MCP server?

LabJack T-series DAQ is an MCP server listed in the public MCP registry as io.github.K-Dense-AI/labmcp-labjack. MCP server for LabJack T4, T7/T7-Pro and T8 DAQ devices (LJM). This page covers its PyPI package (labmcp-labjack).

### Is the LabJack T-series DAQ MCP server safe to use?

LabJack T-series DAQ scores 65 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 LabJack T-series DAQ MCP server expose?

LabJack T-series DAQ exposes 12 tools: get_connection_info, get_command_log, reconnect, get_device_info, read_analog_inputs, and 7 more. Their descriptions and schemas cost roughly 1,532 tokens of context every time the server is loaded.

### Is the LabJack T-series DAQ MCP server still maintained?

LabJack T-series DAQ 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 LabJack T-series DAQ MCP server under?

LabJack T-series DAQ 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-labjack/
- Socket report: https://socket.dev/pypi/package/labmcp-labjack
- Repository: https://github.com/K-Dense-AI/lab-instrument-mcps
- Website: https://github.com/K-Dense-AI/lab-instrument-mcps/tree/main/servers/engineering/labjack
- Changelog RSS feed: https://verifymcp.io/servers/k-dense-ai-labmcp-labjack/labmcp-labjack.xml
- Changelog JSON feed: https://verifymcp.io/servers/k-dense-ai-labmcp-labjack/labmcp-labjack.json
- HTML version of this page: https://verifymcp.io/servers/k-dense-ai-labmcp-labjack/labmcp-labjack