# io.github.rog0x/json (npm · @rog0x/mcp-json-tools)

JSON/YAML/CSV validate, diff, transform for AI agents

- Trust score: 68/100 (medium)
- Change this week: +22
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `@rog0x/mcp-json-tools`: 68/100 (this document), [markdown](https://verifymcp.io/servers/rog0x-json/rog0x-mcp-json-tools.md), [page](https://verifymcp.io/servers/rog0x-json/rog0x-mcp-json-tools)

## Channel facts

- Registry: `npm`
- Package: `@rog0x/mcp-json-tools`
- Version: `1.0.1`
- 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 2026-08-03.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (101 of 106), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (101 of 106), so this covers what we could see, not the whole tree.
- **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 133 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 74/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 520 tokens (~74/item across 7 items; 7 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add rog0x-json -- npx -y @rog0x/mcp-json-tools
```

### Codex

```bash
codex mcp add rog0x-json -- npx -y @rog0x/mcp-json-tools
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "rog0x-json": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@rog0x/mcp-json-tools"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add rog0x-json --command npx --arg -y --arg @rog0x/mcp-json-tools
```

### Hermes

```yaml
mcp_servers:
  rog0x-json:
    command: "npx"
    args: ["-y", "@rog0x/mcp-json-tools"]
```

### Other

```json
{
  "mcpServers": {
    "rog0x-json": {
      "command": "npx",
      "args": [
        "-y",
        "@rog0x/mcp-json-tools"
      ]
    }
  }
}
```

## 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.

### 2026-08-02 (score 68, +47)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Malware scan: unverified → pass
- [functional regression] Security disclosure: fail → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Stability: unverified → 0.20
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Schema quality: unverified → good
- [functional] Licence: MIT

### 2026-07-31 (score 21, −3)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-28 (score 24, −22)

- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (7)

### `json_validate` (~67 tokens)

Validate a JSON object against a JSON Schema. Returns whether the data is valid and a list of errors with their paths.

Input parameters:

- `data` (string, required): The JSON data to validate (as a JSON string)
- `schema` (string, required): The JSON Schema to validate against (as a JSON string)

### `json_diff` (~57 tokens)

Compare two JSON objects and show additions, removals, and changes with their paths.

Input parameters:

- `modified` (string, required): The modified JSON object (as a JSON string)
- `original` (string, required): The original JSON object (as a JSON string)

### `json_transform` (~129 tokens)

Apply transformations to a JSON object: pick specific fields, rename keys, flatten nested objects, or unflatten dot-notation keys.

Input parameters:

- `data` (string, required): The JSON data to transform (as a JSON string)
- `fields` (array): For 'pick': array of field paths to extract (supports dot notation like 'user.name')
- `mapping` (object): For 'rename': object mapping old key names to new key names
- `operation` (string, required): The transformation operation to apply
- `separator` (string): For 'flatten'/'unflatten': separator character (default: '.')

### `csv_to_json` (~98 tokens)

Convert CSV text to a JSON array of objects. Supports custom delimiters, header row detection, and automatic type casting.

Input parameters:

- `castTypes` (boolean): Automatically cast numeric and boolean values from strings (default: false)
- `csv` (string, required): The CSV text to convert
- `delimiter` (string): Column delimiter character (default: ','
- `hasHeaders` (boolean): Whether the first row contains column headers (default: true)

### `json_to_csv` (~75 tokens)

Convert a JSON array of objects to CSV text. Automatically extracts headers from object keys.

Input parameters:

- `data` (string, required): The JSON array to convert (as a JSON string)
- `delimiter` (string): Column delimiter character (default: ',')
- `includeHeaders` (boolean): Whether to include a header row (default: true)

### `yaml_to_json` (~47 tokens)

Convert YAML text to a JSON string.

Input parameters:

- `indent` (number): JSON indentation spaces (default: 2)
- `yamlText` (string, required): The YAML text to convert to JSON

### `json_to_yaml` (~47 tokens)

Convert a JSON string to YAML text.

Input parameters:

- `indent` (number): YAML indentation spaces (default: 2)
- `jsonText` (string, required): The JSON text to convert to YAML

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/rog0x-json/rog0x-mcp-json-tools#diagnostics

## Score history

- 2026-08-03: 68
- 2026-08-02: 68
- 2026-08-01: 21
- 2026-07-31: 21
- 2026-07-30: 24
- 2026-07-28: 24
- 2026-07-27: 46

## Links

- npm package: https://www.npmjs.com/package/@rog0x/mcp-json-tools
- Socket report: https://socket.dev/npm/package/@rog0x/mcp-json-tools
- Repository: https://github.com/rog0x/mcp-json-tools
- Changelog RSS feed: https://verifymcp.io/servers/rog0x-json/rog0x-mcp-json-tools/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/rog0x-json/rog0x-mcp-json-tools/changelog.json
- HTML version of this page: https://verifymcp.io/servers/rog0x-json/rog0x-mcp-json-tools