# USB LIN Converter (pypi · ucan-lin-mcp)

Sniff and reverse-engineer a car's LIN bus: capture, changing bits, speed detect, LDF decode

- Trust score: 53/100 (low)
- Change this week: +6
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- pypi · `ucan-lin-mcp`: 53/100 (this document), [markdown](https://verifymcp.io/servers/lukasz-juranek-lin-usb-converter/ucan-lin-mcp.md), [page](https://verifymcp.io/servers/lukasz-juranek-lin-usb-converter/ucan-lin-mcp)

## Channel facts

- Registry: `pypi`
- Package: `ucan-lin-mcp`
- 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 2026-11-05.

- **Supply Chain Security**: 43/100
  - Malware scan not yet available for this package.
  - No known CVEs affecting this package version or its production dependencies.
  - Declares code that runs automatically (setup.py) and that we could not recognise. It may be perfectly ordinary, but we have not established what it does.
  - 2 of 30 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 64/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 879 tokens (~97/item across 9 items; 9 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 43/100
  - Stability observed for 13 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
- **Tool Safety**: 75/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "send_frame" implies "send" and declares no destructiveHint at all, which the MCP spec reads as destructive by default.
  - An AI judge read all 10 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 USB LIN Converter MCP server?

USB LIN Converter runs locally as a PyPI package, launched with uvx ucan-lin-mcp. 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 lukasz-juranek-lin-usb-converter -- uvx ucan-lin-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "lukasz-juranek-lin-usb-converter": {
      "command": "uvx",
      "args": [
        "ucan-lin-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "lukasz-juranek-lin-usb-converter": {
      "command": "uvx",
      "args": [
        "ucan-lin-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add lukasz-juranek-lin-usb-converter -- uvx ucan-lin-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "lukasz-juranek-lin-usb-converter": {
      "type": "local",
      "command": [
        "uvx",
        "ucan-lin-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add lukasz-juranek-lin-usb-converter --command uvx --arg ucan-lin-mcp
```

### Hermes

```yaml
mcp_servers:
  lukasz-juranek-lin-usb-converter:
    command: "uvx"
    args: ["ucan-lin-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "lukasz-juranek-lin-usb-converter": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "ucan-lin-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add lukasz-juranek-lin-usb-converter -t stdio -c uvx -a ucan-lin-mcp
```

### Other

```json
{
  "mcpServers": {
    "lukasz-juranek-lin-usb-converter": {
      "command": "uvx",
      "args": [
        "ucan-lin-mcp"
      ]
    }
  }
}
```

## 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.

### 2026-11-05 (score 53, −15)

- [security regression] Malware scan: pass → unverified

### 2026-11-04 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 67, +5)

- [functional improvement] Stability: unverified → 0.37
- [functional] Package version: 0.1.1 → 0.1.2

### 2026-10-30 (score 62, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-10-26 (score 47, −15)

- [security regression] Malware scan: pass → unverified

### 2026-10-24 (score 62, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-10-23 (score 47)

First indexed and scored.

## MCP tools (9)

### `device_info` (~29 tokens)

Converter port, firmware version, whether transmitting is allowed, and
the loaded LDF (if any).

### `monitor_bus` (~176 tokens)

Listen to the bus passively and summarize what is on it.

Per frame id: count, period, last data, how many distinct values were
seen and changing_bits (a per-byte mask of bits that changed). 'changes'
lists every data change in time order, so asking the user to press a
button during the capture shows which id and bit it drives.
speed: 19200 (most cars), 10417 or 9600. checksum: 'enhanced' (LIN 2.x)
or 'classic' (LIN 1.x); frames with the other checksum are dropped by the
converter. ids: optional filter, e.g. ["0x0C"].

Input parameters:

- `checksum` (string)
- `duration_s` (number)
- `ids`
- `speed` (integer)

### `detect_bus` (~43 tokens)

Try every speed and checksum combination and report which one sees
valid frames. Use when monitor_bus shows nothing on a live bus.

Input parameters:

- `seconds_per_try` (number)

### `load_ldf` (~55 tokens)

Load a LIN Description File so captures show signal names and values.
Returns its frames and signals. Pass path "mock" with a --mock server to
load the simulated bus's LDF.

Input parameters:

- `path` (string, required)

### `decode_frame` (~52 tokens)

Decode raw frame bytes into signal values with the loaded LDF.
id like "0x0C", data hex like "05 1e".

Input parameters:

- `data` (string, required)
- `id` (string, required)

### `encode_frame` (~53 tokens)

Build frame bytes from signal values with the loaded LDF. Signals not
given keep their LDF default. Returns id and data ready for send_frame.

Input parameters:

- `frame` (string, required)
- `signals` (object, required)

### `send_frame` (~106 tokens)

Inject a complete frame (header + data) on the bus from monitor mode,
\`repeat` times about 20 ms apart, and capture the bus for a moment after.
Needs --allow-transmit. The converter echoes only the header of its own
frame back, so check the effect in the following traffic.

Input parameters:

- `checksum` (string)
- `data` (string, required)
- `id` (string, required)
- `repeat` (integer)
- `speed` (integer)

### `run_master` (~124 tokens)

Act as the LIN master for duration_s: run a schedule that sends the
\`transmit` frames ([{"id": "0x0B", "data": "05"}]) and polls the
\`receive` ids ([{"id": "0x0C", "length": 2}]), then summarize the slave
responses. Use only with the real master disconnected. Needs --allow-transmit.

Input parameters:

- `checksum` (string)
- `duration_s` (number)
- `receive`
- `speed` (integer)
- `transmit`

### `run_slave` (~125 tokens)

Simulate a slave node for duration_s: answer the master's headers for
the `respond` ids with fixed data ([{"id": "0x0C", "data": "01 1e"}]) and
capture the `listen` ids the master sends ([{"id": "0x0B", "length": 1}]).
Use only with the real slave disconnected. Needs --allow-transmit.

Input parameters:

- `checksum` (string)
- `duration_s` (number)
- `listen`
- `respond`
- `speed` (integer)

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/lukasz-juranek-lin-usb-converter/ucan-lin-mcp#diagnostics

## Score history

- 2026-11-05: 53
- 2026-11-04: 68
- 2026-11-03: 67
- 2026-11-02: 62
- 2026-11-01: 62
- 2026-10-31: 62
- 2026-10-30: 62
- 2026-10-29: 47
- 2026-10-28: 47
- 2026-10-27: 47
- 2026-10-26: 47
- 2026-10-25: 62
- 2026-10-24: 62
- 2026-10-23: 47

## Common questions

### What is the USB LIN Converter MCP server?

USB LIN Converter is an MCP server listed in the public MCP registry as io.github.Lukasz-Juranek/lin-usb-converter. Sniff and reverse-engineer a car's LIN bus: capture, changing bits, speed detect, LDF decode. This page covers its PyPI package (ucan-lin-mcp).

### Is the USB LIN Converter MCP server safe to use?

USB LIN Converter scores 53 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. 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 USB LIN Converter MCP server expose?

USB LIN Converter exposes 9 tools: device_info, monitor_bus, detect_bus, load_ldf, decode_frame, and 4 more. Their descriptions and schemas cost roughly 763 tokens of context every time the server is loaded.

### Is the USB LIN Converter MCP server still maintained?

USB LIN Converter is still listed as active in the MCP registry. We last reached this channel on 5 November 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 USB LIN Converter MCP server under?

USB LIN Converter declares the MIT 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/ucan-lin-mcp/
- Socket report: https://socket.dev/pypi/package/ucan-lin-mcp
- Repository: https://github.com/uCAN-LIN/LinUSBConverter
- Website: https://ucandevices.github.io/ulc.html
- Changelog RSS feed: https://verifymcp.io/servers/lukasz-juranek-lin-usb-converter/ucan-lin-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/lukasz-juranek-lin-usb-converter/ucan-lin-mcp.json
- HTML version of this page: https://verifymcp.io/servers/lukasz-juranek-lin-usb-converter/ucan-lin-mcp