# Keithley SourceMeter SMU (pypi · labmcp-keithley-smu)

MCP server for Keithley SourceMeter SMUs (2400 series SCPI, 2450 family SCPI, 2600B TSP).

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

## Components

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

## Channel facts

- Registry: `pypi`
- Package: `labmcp-keithley-smu`
- 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**: 77/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1433 tokens (~119/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**: 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).
  - 95% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 50/100
  - Injection-marker check failed: the server instructions contains an instruction to conceal the call from the user, the text "Never tell the user", at byte 998 of that field.
  - 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).

## Install

### How do I install the Keithley SourceMeter SMU MCP server?

Keithley SourceMeter SMU runs locally as a PyPI package, launched with uvx labmcp-keithley-smu. 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-keithley-smu -- uvx labmcp-keithley-smu
```

### Cursor

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

### VS Code

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

### Codex

```bash
codex mcp add k-dense-ai-labmcp-keithley-smu -- uvx labmcp-keithley-smu
```

### opencode

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

### OpenClaw

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

### Hermes

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

### Netclaw

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

### Vellum

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

### Other

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

## 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.

### 2026-09-29 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-28 (score 64, −5)

- [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, +1)

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

### 2026-09-26 (score 68)

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` (~51 tokens)

Get Device Info

Identify the SMU: manufacturer, model, serial, firmware, command dialect (2400 / 2450 /
2600), channel (2600B) and the model's maximum source voltage and current.

### `get_status` (~46 tokens)

Get Status

Report whether the output is on, the source function (voltage/current), programmed level,
compliance limit, whether the source is in compliance, terminals and 2/4-wire sense.

Output parameters:

- `compliance` (number): Compliance limit, in compliance_unit
- `compliance_unit` (string)
- `dialect` (string)
- `in_compliance` (boolean): True if the source is presently clamped at the compliance limit
- `level` (number): Programmed source level, in level_unit
- `level_unit` (string)
- `output_on` (boolean)
- `remote_sense`: True = 4-wire (remote) sense
- `source` (string)
- `terminals`: front/rear (None on the 2600B, which has one set of terminals)
- `timestamp` (string)

### `configure_source` (~169 tokens)

Configure Source

Set up the source (function, level, compliance, range, measurement speed) while the output
is OFF. Measures V and I with auto-ranging. Refused if the output is on; turn it off first or
use `set_source_level`. Limits are checked before anything is sent.

Input parameters:

- `compliance` (number, required): Limit: current limit in A (voltage source) or voltage limit in V (current source)
- `level` (number, required): Source level: volts for a voltage source, amps for a current source
- `nplc` (number): Measurement integration time in power-line cycles (1 = 16.7/20 ms)
- `source` (string, required): Source voltage or current
- `source_range`: Fixed source range (V or A); omit for auto-range

Output parameters:

- `compliance` (number): Compliance limit, in compliance_unit
- `compliance_unit` (string)
- `dialect` (string)
- `in_compliance` (boolean): True if the source is presently clamped at the compliance limit
- `level` (number): Programmed source level, in level_unit
- `level_unit` (string)
- `output_on` (boolean)
- `remote_sense`: True = 4-wire (remote) sense
- `source` (string)
- `terminals`: front/rear (None on the 2600B, which has one set of terminals)
- `timestamp` (string)

### `set_source_level` (~68 tokens)

Set Source Level

Change the level of the configured source. If the output is ON the new voltage/current is
applied to the DUT immediately. The level and the present compliance are checked against the
safety limits first.

Input parameters:

- `level` (number, required): New level for the configured source: V or A

Output parameters:

- `compliance` (number): Compliance limit, in compliance_unit
- `compliance_unit` (string)
- `dialect` (string)
- `in_compliance` (boolean): True if the source is presently clamped at the compliance limit
- `level` (number): Programmed source level, in level_unit
- `level_unit` (string)
- `output_on` (boolean)
- `remote_sense`: True = 4-wire (remote) sense
- `source` (string)
- `terminals`: front/rear (None on the 2600B, which has one set of terminals)
- `timestamp` (string)

### `output_on` (~64 tokens)

Output On

Switch the SMU output ON: the configured voltage or current is applied to the DUT. The
programmed level and compliance are read back from the instrument and checked against the
safety limits first. Confirm with the user that the DUT is connected and safe to energise.

Output parameters:

- `compliance` (number): Compliance limit, in compliance_unit
- `compliance_unit` (string)
- `dialect` (string)
- `in_compliance` (boolean): True if the source is presently clamped at the compliance limit
- `level` (number): Programmed source level, in level_unit
- `level_unit` (string)
- `output_on` (boolean)
- `remote_sense`: True = 4-wire (remote) sense
- `source` (string)
- `terminals`: front/rear (None on the 2600B, which has one set of terminals)
- `timestamp` (string)

### `output_off` (~34 tokens)

Output Off

Switch the SMU output OFF immediately (and abort any IV sweep in progress). Always
available, including in read-only mode.

Output parameters:

- `compliance` (number): Compliance limit, in compliance_unit
- `compliance_unit` (string)
- `dialect` (string)
- `in_compliance` (boolean): True if the source is presently clamped at the compliance limit
- `level` (number): Programmed source level, in level_unit
- `level_unit` (string)
- `output_on` (boolean)
- `remote_sense`: True = 4-wire (remote) sense
- `source` (string)
- `terminals`: front/rear (None on the 2600B, which has one set of terminals)
- `timestamp` (string)

### `measure` (~47 tokens)

Measure

Take one source-measure reading (voltage, current, V/I, power, compliance flag) of the
energised DUT. Does not change any setting; refused if the output is off.

Output parameters:

- `compliance` (number)
- `current_a` (number)
- `in_compliance` (boolean)
- `level` (number)
- `power_w` (number): V x I (negative = the DUT delivers power)
- `resistance_ohm`: V / I (None if I = 0)
- `source` (string)
- `timestamp` (string)
- `voltage_v` (number)

### `set_4wire` (~79 tokens)

Set 4Wire

Select 4-wire (remote sense, Kelvin) or 2-wire measurement. 4-wire removes lead
resistance for low-resistance DUTs but needs the SENSE leads connected. Refused while the
output is on.

Input parameters:

- `enabled` (boolean, required): True = 4-wire remote sense, False = 2-wire local sense

Output parameters:

- `compliance` (number): Compliance limit, in compliance_unit
- `compliance_unit` (string)
- `dialect` (string)
- `in_compliance` (boolean): True if the source is presently clamped at the compliance limit
- `level` (number): Programmed source level, in level_unit
- `level_unit` (string)
- `output_on` (boolean)
- `remote_sense`: True = 4-wire (remote) sense
- `source` (string)
- `terminals`: front/rear (None on the 2600B, which has one set of terminals)
- `timestamp` (string)

### `run_iv_sweep` (~287 tokens)

Run Iv Sweep

Run a stepped IV sweep: configure the source, switch the output ON, step through the
levels measuring V and I at each, then ALWAYS switch the output OFF (also on errors or when
\`output_off` is called). Returns the curve (downsampled), compliance flags, a linear fit and
optional full CSV (a new file; an existing file is never overwritten). The output must be off
beforehand. Limits are checked first.

Input parameters:

- `compliance` (number, required): Current limit in A (voltage sweep) or voltage limit in V (current sweep)
- `delay_s` (number): Settling delay at each point, s
- `dual` (boolean): Sweep back from stop to start afterwards (hysteresis)
- `max_points` (integer): Maximum points returned in the reply
- `nplc` (number): Integration time per measurement, PLC
- `points` (integer, required): Levels from start to stop (inclusive)
- `save_path`: Optional CSV path for every point
- `source` (string): Sweep voltage or current
- `spacing` (string): Level spacing
- `start` (number, required): First level: V (voltage sweep) or A (current sweep)
- `stop` (number, required): Last level: V or A
- `stop_on_compliance` (boolean): End the sweep at the first compliance point

Output parameters:

- `aborted` (boolean)
- `compliance` (number)
- `compliance_points` (integer): Number of measured points that were in compliance
- `compliance_unit` (string)
- `current_a` (array): Measured current (downsampled; null = overflow)
- `current_max_a`
- `current_min_a`
- `dual` (boolean)
- `duration_s` (number)
- `first_compliance_level`
- `in_compliance` (array): Compliance flag per returned point
- `level` (array): Programmed source levels (downsampled to max_points)
- `max_abs_power_w`
- `ohmic_fit`: Least-squares line through the non-compliance points of a linear sweep (meaningful for resistive DUTs)
- `output_off` (boolean): Output state confirmed OFF after the sweep
- `overflow_points` (integer): Points where the SMU returned its overflow marker (excluded from stats and fit)
- `points_measured` (integer)
- `points_requested` (integer)
- `points_returned` (integer)
- `saved_to`
- `source` (string)
- `spacing` (string)
- `started` (string)
- `stop_reason`
- `voltage_max_v`
- `voltage_min_v`
- `voltage_v` (array): Measured voltage (downsampled; null = overflow)

## Diagnostics

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

## Score history

- 2026-09-30: 65
- 2026-09-29: 65
- 2026-09-28: 64
- 2026-09-27: 69
- 2026-09-26: 68

## Common questions

### What is the Keithley SourceMeter SMU MCP server?

Keithley SourceMeter SMU is an MCP server listed in the public MCP registry as io.github.K-Dense-AI/labmcp-keithley-smu. MCP server for Keithley SourceMeter SMUs (2400 series SCPI, 2450 family SCPI, 2600B TSP). This page covers its PyPI package (labmcp-keithley-smu).

### Is the Keithley SourceMeter SMU MCP server safe to use?

Keithley SourceMeter SMU 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 Keithley SourceMeter SMU MCP server expose?

Keithley SourceMeter SMU exposes 12 tools: get_connection_info, get_command_log, reconnect, get_device_info, get_status, and 7 more. Their descriptions and schemas cost roughly 966 tokens of context every time the server is loaded.

### Is the Keithley SourceMeter SMU MCP server still maintained?

Keithley SourceMeter SMU 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 Keithley SourceMeter SMU MCP server under?

Keithley SourceMeter SMU 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-keithley-smu/
- Socket report: https://socket.dev/pypi/package/labmcp-keithley-smu
- Repository: https://github.com/K-Dense-AI/lab-instrument-mcps
- Website: https://github.com/K-Dense-AI/lab-instrument-mcps/tree/main/servers/physics/keithley-smu
- Changelog RSS feed: https://verifymcp.io/servers/k-dense-ai-labmcp-keithley-smu/labmcp-keithley-smu.xml
- Changelog JSON feed: https://verifymcp.io/servers/k-dense-ai-labmcp-keithley-smu/labmcp-keithley-smu.json
- HTML version of this page: https://verifymcp.io/servers/k-dense-ai-labmcp-keithley-smu/labmcp-keithley-smu