# Bench DC Power Supply (pypi · labmcp-bench-psu)

MCP server for programmable DC bench power supplies from Rigol, Siglent and Aim-TTi.

- Trust score: 69/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-30

## Components

- pypi · `labmcp-bench-psu`: 69/100 (this document), [markdown](https://verifymcp.io/servers/k-dense-ai-labmcp-bench-psu/labmcp-bench-psu.md), [page](https://verifymcp.io/servers/k-dense-ai-labmcp-bench-psu/labmcp-bench-psu)

## Channel facts

- Registry: `pypi`
- Package: `labmcp-bench-psu`
- 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**: 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**: 81/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 1180 tokens (~98/item across 12 items; 12 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 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 Bench DC Power Supply MCP server?

Bench DC Power Supply runs locally as a PyPI package, launched with uvx labmcp-bench-psu. 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-bench-psu -- uvx labmcp-bench-psu
```

### Cursor

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

### VS Code

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

### Codex

```bash
codex mcp add k-dense-ai-labmcp-bench-psu -- uvx labmcp-bench-psu
```

### opencode

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

### OpenClaw

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

### Hermes

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

### Netclaw

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

### Vellum

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

### Other

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

## 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 69, +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 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, +33)

- [security improvement] Injection markers: unverified → pass
- [security] First check of Judged manipulation: pass
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Stability: unverified → 0.03
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: excellent
- [functional] First check of Destructive annotations: pass
- [functional] First check of Tool coverage: 92
- [functional] First check of Schema quality: pass
- [functional] First check of Tool coverage: 100
- [functional] Package version: 0.1.2 → 0.1.3

### 2026-09-26 (score 39)

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_outputs` (~61 tokens)

Get Outputs

Report each channel: voltage and current-limit setpoints, measured voltage/current/power,
output on/off, CV/CC mode, and OVP/OCP levels and trip state where the model supports them.

Input parameters:

- `channel`: One channel, or omit for all

Output parameters:

- `result` (array)

### `set_voltage` (~93 tokens)

Set Voltage

Set a channel's voltage setpoint. Refused above `max_voltage_v` (checked even with the output
off) or above the channel's range. If the output is on, the load sees the new voltage at once.

Input parameters:

- `channel` (integer, required): Output channel number (1 = CH1 / output 1)
- `voltage_v` (number, required): Voltage setpoint in V (negative only on negative channels)

Output parameters:

- `channel` (integer)
- `max_current_a`
- `max_voltage_v`: Highest settable voltage on this channel (model table)
- `measured_current_a`
- `measured_power_w`
- `measured_voltage_v`
- `mode`: 'CV', 'CC' or 'UR' (unregulated); None when off or unknown
- `mode_source`: 'instrument' or 'inferred' (from readback vs setpoints)
- `notes` (array)
- `ocp_a`
- `ocp_enabled`
- `ocp_tripped`
- `output_on`: Output state (None if the instrument cannot report it)
- `ovp_enabled`
- `ovp_tripped`
- `ovp_v`
- `set_current_a`: Current limit setpoint
- `set_voltage_v`
- `timestamp` (string): UTC time of the readings (ISO 8601)

### `set_current_limit` (~78 tokens)

Set Current Limit

Set a channel's current limit (the constant-current setpoint). Refused above `max_current_a`
(checked even with the output off) or above the channel's range.

Input parameters:

- `channel` (integer, required): Output channel number (1 = CH1 / output 1)
- `current_a` (number, required): Current-limit setpoint in A

Output parameters:

- `channel` (integer)
- `max_current_a`
- `max_voltage_v`: Highest settable voltage on this channel (model table)
- `measured_current_a`
- `measured_power_w`
- `measured_voltage_v`
- `mode`: 'CV', 'CC' or 'UR' (unregulated); None when off or unknown
- `mode_source`: 'instrument' or 'inferred' (from readback vs setpoints)
- `notes` (array)
- `ocp_a`
- `ocp_enabled`
- `ocp_tripped`
- `output_on`: Output state (None if the instrument cannot report it)
- `ovp_enabled`
- `ovp_tripped`
- `ovp_v`
- `set_current_a`: Current limit setpoint
- `set_voltage_v`
- `timestamp` (string): UTC time of the readings (ISO 8601)

### `output_on` (~76 tokens)

Output On

Switch a channel's output ON, energising the connected load at the present setpoints.
The setpoints are read back first and the output is refused if they exceed the safety limits
(e.g. after someone changed them on the front panel).

Input parameters:

- `channel` (integer, required): Output channel number (1 = CH1 / output 1)

Output parameters:

- `channel` (integer)
- `max_current_a`
- `max_voltage_v`: Highest settable voltage on this channel (model table)
- `measured_current_a`
- `measured_power_w`
- `measured_voltage_v`
- `mode`: 'CV', 'CC' or 'UR' (unregulated); None when off or unknown
- `mode_source`: 'instrument' or 'inferred' (from readback vs setpoints)
- `notes` (array)
- `ocp_a`
- `ocp_enabled`
- `ocp_tripped`
- `output_on`: Output state (None if the instrument cannot report it)
- `ovp_enabled`
- `ovp_tripped`
- `ovp_v`
- `set_current_a`: Current limit setpoint
- `set_voltage_v`
- `timestamp` (string): UTC time of the readings (ISO 8601)

### `output_off` (~41 tokens)

Output Off

Switch a channel's output OFF. Safe to call at any time.

Input parameters:

- `channel` (integer, required): Output channel number (1 = CH1 / output 1)

Output parameters:

- `channel` (integer)
- `max_current_a`
- `max_voltage_v`: Highest settable voltage on this channel (model table)
- `measured_current_a`
- `measured_power_w`
- `measured_voltage_v`
- `mode`: 'CV', 'CC' or 'UR' (unregulated); None when off or unknown
- `mode_source`: 'instrument' or 'inferred' (from readback vs setpoints)
- `notes` (array)
- `ocp_a`
- `ocp_enabled`
- `ocp_tripped`
- `output_on`: Output state (None if the instrument cannot report it)
- `ovp_enabled`
- `ovp_tripped`
- `ovp_v`
- `set_current_a`: Current limit setpoint
- `set_voltage_v`
- `timestamp` (string): UTC time of the readings (ISO 8601)

### `all_outputs_off` (~39 tokens)

All Outputs Off

Switch every output OFF (emergency stop for the whole supply). Each channel is switched
individually and read back where the instrument supports it.

Output parameters:

- `all_off_confirmed` (boolean)
- `outputs` (array)
- `problems` (array)

### `set_protection` (~154 tokens)

Set Protection

Set over-voltage (OVP) and/or over-current (OCP) protection for a channel. When exceeded,
the supply switches the output off. Rigol: levels + on/off; Aim-TTi CPX/QL/PL-P: levels (always
armed), MX: levels + on/off; Siglent SPD1000X: levels only; SPD3303X: not available.

Input parameters:

- `channel` (integer, required): Output channel number (1 = CH1 / output 1)
- `enabled`: Switch OVP/OCP on or off (models that allow it)
- `ocp_a`: Over-current trip level in A
- `ovp_v`: Over-voltage trip level in V

Output parameters:

- `channel` (integer)
- `notes` (array)
- `ocp_a`
- `ocp_enabled`
- `ocp_tripped`
- `ovp_enabled`
- `ovp_tripped`
- `ovp_v`

### `clear_protection_trip` (~70 tokens)

Clear Protection Trip

Clear an OVP/OCP trip after fixing its cause. The output stays OFF; use `output_on` to
re-energise. On Aim-TTi supplies this clears trips on all outputs.

Input parameters:

- `channel` (integer, required): Output channel number (1 = CH1 / output 1)

Output parameters:

- `result` (string)

### `get_errors` (~28 tokens)

Get Errors

Read (and clear) the instrument's error queue / error registers. Empty list = no errors.

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-bench-psu/labmcp-bench-psu#diagnostics

## Score history

- 2026-09-30: 69
- 2026-09-29: 69
- 2026-09-28: 68
- 2026-09-27: 72
- 2026-09-26: 39

## Common questions

### What is the Bench DC Power Supply MCP server?

Bench DC Power Supply is an MCP server listed in the public MCP registry as io.github.K-Dense-AI/labmcp-bench-psu. MCP server for programmable DC bench power supplies from Rigol, Siglent and Aim-TTi. This page covers its PyPI package (labmcp-bench-psu).

### Is the Bench DC Power Supply MCP server safe to use?

Bench DC Power Supply scores 69 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 Bench DC Power Supply MCP server expose?

Bench DC Power Supply exposes 12 tools: get_connection_info, get_command_log, reconnect, get_outputs, set_voltage, and 7 more. Their descriptions and schemas cost roughly 761 tokens of context every time the server is loaded.

### Is the Bench DC Power Supply MCP server still maintained?

Bench DC Power Supply 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 Bench DC Power Supply MCP server under?

Bench DC Power Supply 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-bench-psu/
- Socket report: https://socket.dev/pypi/package/labmcp-bench-psu
- Repository: https://github.com/K-Dense-AI/lab-instrument-mcps
- Website: https://github.com/K-Dense-AI/lab-instrument-mcps/tree/main/servers/engineering/bench-power-supply
- Changelog RSS feed: https://verifymcp.io/servers/k-dense-ai-labmcp-bench-psu/labmcp-bench-psu.xml
- Changelog JSON feed: https://verifymcp.io/servers/k-dense-ai-labmcp-bench-psu/labmcp-bench-psu.json
- HTML version of this page: https://verifymcp.io/servers/k-dense-ai-labmcp-bench-psu/labmcp-bench-psu