# Rowsmith test data (npm · rowsmith-mcp)

Fake test data (CSV, JSON, SQL) from a schema. Reserved-range identifiers; reproducible by seed.

- Trust score: 69/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- npm · `rowsmith-mcp`: 69/100 (this document), [markdown](https://verifymcp.io/servers/meiorz-rowsmith/rowsmith-mcp.md), [page](https://verifymcp.io/servers/meiorz-rowsmith/rowsmith-mcp)

## Channel facts

- Registry: `npm`
- Package: `rowsmith-mcp`
- Version: `0.5.0`
- 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**: 81/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known high-severity CVE affects @modelcontextprotocol/sdk 1.31.0, a direct dependency. A fixed version is available.
  - No install/post-install scripts declared.
  - 30 of 93 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 17 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 52/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 728 tokens (~242/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 63/100
  - Stability observed for 19 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).
  - 93% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Rowsmith test data MCP server?

Rowsmith test data runs locally as an npm package, launched with npx -y rowsmith-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 meiorz-rowsmith -- npx -y rowsmith-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "meiorz-rowsmith": {
      "command": "npx",
      "args": [
        "-y",
        "rowsmith-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "meiorz-rowsmith": {
      "command": "npx",
      "args": [
        "-y",
        "rowsmith-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add meiorz-rowsmith -- npx -y rowsmith-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "meiorz-rowsmith": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "rowsmith-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add meiorz-rowsmith --command npx --arg -y --arg rowsmith-mcp
```

### Hermes

```yaml
mcp_servers:
  meiorz-rowsmith:
    command: "npx"
    args: ["-y", "rowsmith-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "meiorz-rowsmith": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "rowsmith-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add meiorz-rowsmith -t stdio -c npx -a -y rowsmith-mcp
```

### Other

```json
{
  "mcpServers": {
    "meiorz-rowsmith": {
      "command": "npx",
      "args": [
        "-y",
        "rowsmith-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.

### 2026-11-04 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 64, +1)

- [security regression] CVE-2023-54404 affects this package: high

### 2026-10-22 (score 63, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-21 (score 62, −5)

- [security regression] CVE-2026-111771 affects this package: high
- [security regression] CVE-2026-111768 affects this package: high
- [security regression] CVE-2026-111769 affects this package: high
- [security regression] CVE-2026-111767 affects this package: high
- [security regression] Known CVEs: pass → fail

## MCP tools (3)

### `generate_test_data` (~521 tokens)

Generate test data

Generate fake test data (CSV, JSON or SQL INSERTs) from a table schema. Use it first, when you need rows for fixtures, seed data or tests (list_column_types gives each type's options). Or pass schema (JSON Schema, e.g. a Pydantic or Zod export, or an OpenAPI component) instead of columns; unmappable fields are named. For related tables with matching keys, pass tables (one call, SQL or JSON). Next: invalid_values for values your code should reject. Free and rate-limited: up to 500 rows and 50 columns per call. No real person's data is used as input and no record is derived from a real person; emails, phones, card numbers, SSN-shaped and IBAN-shaped values come only from reserved or invalid ranges. The same schema and seed give byte-identical output for the same generator version (sent as x-generator-version). For more than about 50 rows, pass output_path to write a file instead of returning the data. The result gives the output's sha256 and ends with a curl that regenerates the same bytes. Send schemas only, never real data.

Input parameters:

- `chaos` (object): Deliberate misbehaviour for testing error handling
- `columns` (array): The table's columns, 1 to 50
- `format` (string): Output format (default csv)
- `output_path` (string): Write the data to this file instead of returning it (use for more than about 50 rows). Must be inside the working directory, or inside ROWSMITH_OUT_DIR when set; no '..' segments
- `overwrite` (boolean): Replace output_path if it already exists (default false)
- `rows` (integer): Number of rows, 1 to 500 (default 100)
- `schema` (object): Instead of columns: a JSON Schema object, or {openapi: <document>, component: <name>}
- `seed` (integer): Seed; the same schema and seed give identical output for the same generator version (default 1)
- `table` (string): Table name, used in SQL output (default data)
- `tables` (array): Instead of columns, schema, rows, table: related tables in order, each {name, rows, columns or schema}. A column {name, type: 'ref', table, column} takes its values from an earlier table's primary ke…

### `list_column_types` (~34 tokens)

List column types

List the supported column types and the options each accepts. Use it before generate_test_data when you need a type's options.

### `invalid_values` (~141 tokens)

Invalid test values

Deliberately invalid TEST DATA values (malformed emails, declining or Luhn-invalid card numbers, malformed addresses, Unicode edge cases, invalid IBAN and SSN shapes), each with the reason it is invalid. Same seed, same output for the same catalogue version. Use it after generate_test_data, to test that your validation rejects bad input.

Input parameters:

- `chaos` (object): Deliberate misbehaviour for testing error handling
- `count` (integer): Default 10
- `fields` (string): Comma-separated fields to keep, e.g. value,reason
- `kind` (string): Default all
- `seed` (integer)

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/meiorz-rowsmith/rowsmith-mcp#diagnostics

## Score history

- 2026-11-05: 69
- 2026-11-04: 69
- 2026-11-03: 68
- 2026-11-02: 68
- 2026-11-01: 68
- 2026-10-31: 67
- 2026-10-30: 67
- 2026-10-29: 66
- 2026-10-28: 66
- 2026-10-27: 65
- 2026-10-26: 65
- 2026-10-25: 64
- 2026-10-24: 64
- 2026-10-23: 63
- 2026-10-22: 63
- 2026-10-21: 62
- 2026-10-20: 67
- 2026-10-19: 67
- 2026-10-18: 61
- 2026-10-17: 64

## Common questions

### What is the Rowsmith test data MCP server?

Rowsmith test data is an MCP server listed in the public MCP registry as io.github.meiorz/rowsmith. Fake test data (CSV, JSON, SQL) from a schema. Reserved-range identifiers; reproducible by seed. This page covers its npm package (rowsmith-mcp).

### Is the Rowsmith test data MCP server safe to use?

Rowsmith test data scores 69 out of 100 on VerifyMCP. We recorded 5 known advisories against it as of 5 November 2026. It declares no install or post-install scripts. 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 Rowsmith test data MCP server expose?

Rowsmith test data exposes 3 tools: generate_test_data, list_column_types, invalid_values. Their descriptions and schemas cost roughly 696 tokens of context every time the server is loaded.

### Is the Rowsmith test data MCP server still maintained?

Rowsmith test data 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 Rowsmith test data MCP server under?

Rowsmith test data 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

- npm package: https://www.npmjs.com/package/rowsmith-mcp
- Socket report: https://socket.dev/npm/package/rowsmith-mcp
- Repository: https://github.com/meiorz/rowsmith-mcp
- Changelog RSS feed: https://verifymcp.io/servers/meiorz-rowsmith/rowsmith-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/meiorz-rowsmith/rowsmith-mcp.json
- HTML version of this page: https://verifymcp.io/servers/meiorz-rowsmith/rowsmith-mcp