# io.github.esperanza-volkov/confdiff-mcp (npm · confdiff-mcp)

Semantic, format-aware diff of config files (JSON/YAML/TOML/INI/.env/XML/CSV) for AI agents

- Trust score: 78/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-24

## Components

- npm · `confdiff-mcp`: 78/100 (this document), [markdown](https://verifymcp.io/servers/esperanza-volkov-confdiff-mcp/confdiff-mcp.md), [page](https://verifymcp.io/servers/esperanza-volkov-confdiff-mcp/confdiff-mcp)

## Channel facts

- Registry: `npm`
- Package: `confdiff-mcp`
- Version: `0.17.1`
- 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 2026-09-24.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - No production dependencies, so there is no dependency health to assess.
- **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 4 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 66/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 711 tokens (~355/item across 2 items; 2 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**: 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.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 2 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 2 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 io.github.esperanza-volkov/confdiff-mcp server?

io.github.esperanza-volkov/confdiff-mcp runs locally as an npm package, launched with npx -y confdiff-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 esperanza-volkov-confdiff-mcp -- npx -y confdiff-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "esperanza-volkov-confdiff-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "confdiff-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "esperanza-volkov-confdiff-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "confdiff-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add esperanza-volkov-confdiff-mcp -- npx -y confdiff-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add esperanza-volkov-confdiff-mcp --command npx --arg -y --arg confdiff-mcp
```

### Hermes

```yaml
mcp_servers:
  esperanza-volkov-confdiff-mcp:
    command: "npx"
    args: ["-y", "confdiff-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "esperanza-volkov-confdiff-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "confdiff-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add esperanza-volkov-confdiff-mcp -t stdio -c npx -a -y confdiff-mcp
```

### Other

```json
{
  "mcpServers": {
    "esperanza-volkov-confdiff-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "confdiff-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.

### 2026-09-24 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-22 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-20 (score 76, +1)

- [security regression] Tool safety: pass → unverified
- [security regression] Stability: 0.47 → unverified
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified
- [functional] Package version: 0.17.0 → 0.17.1

### 2026-09-18 (score 75, +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.

### 2026-09-15 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 73, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-09-06 (score 69, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-05 (score 54)

First indexed and scored.

## MCP tools (2)

### `diff_configs` (~360 tokens)

Diff two config strings semantically

Compare two configuration strings (JSON/JSONC/YAML/TOML/INI/.env/XML/CSV) by MEANING, ignoring key order and formatting noise. Cross-format is supported (diff a JSON against its YAML equivalent). Returns a compact list of real changes plus structured JSON. Set redact=true to mask secret values so plaintext never enters your context.

Input parameters:

- `a` (string, required): First config as a string.
- `arrayKey` (array): Match arrays of objects by a field's value instead of by position, so reordering a list (e.g. a k8s env:/containers: block) is not reported. Bare field name ('name') or scoped 'pathGlob=field'.
- `arraySet` (boolean): Compare arrays as unordered multisets instead of by index.
- `b` (string, required): Second config as a string.
- `formatA` (string): Force the format of the first input (else inferred from filename/content).
- `formatB` (string): Force the format of the second input.
- `ignore` (array): Path globs to ignore, dot notation (e.g. 'metadata.creationTimestamp', 'spec.**').
- `loose` (boolean): Loose scalar comparison: coerce string<->number<->boolean so "3" == 3.
- `only` (array): If set, ONLY paths matching these globs are compared.
- `redact` (boolean): Mask secret VALUES (passwords/tokens/keys, detected by key name) as a stable non-reversible fingerprint, so plaintext secrets never enter your context while drift is still visible.
- `redactEntropy` (boolean): With redact: also mask values that LOOK like secrets (long, high-entropy) under any key.

### `diff_config_files` (~351 tokens)

Diff two config files on disk semantically

Read two config files from disk by path and diff them by MEANING (format inferred from the file extension unless overridden). Use this to check whether an edit changed anything real, compare a before/after, or verify a format migration. Set redact=true to keep secrets out of context.

Input parameters:

- `arrayKey` (array): Match arrays of objects by a field's value instead of by position, so reordering a list (e.g. a k8s env:/containers: block) is not reported. Bare field name ('name') or scoped 'pathGlob=field'.
- `arraySet` (boolean): Compare arrays as unordered multisets instead of by index.
- `formatA` (string): Force the format of the first input (else inferred from filename/content).
- `formatB` (string): Force the format of the second input.
- `ignore` (array): Path globs to ignore, dot notation (e.g. 'metadata.creationTimestamp', 'spec.**').
- `loose` (boolean): Loose scalar comparison: coerce string<->number<->boolean so "3" == 3.
- `only` (array): If set, ONLY paths matching these globs are compared.
- `pathA` (string, required): Path to the first config file.
- `pathB` (string, required): Path to the second config file.
- `redact` (boolean): Mask secret VALUES (passwords/tokens/keys, detected by key name) as a stable non-reversible fingerprint, so plaintext secrets never enter your context while drift is still visible.
- `redactEntropy` (boolean): With redact: also mask values that LOOK like secrets (long, high-entropy) under any key.

## Diagnostics

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

## Score history

- 2026-09-24: 78
- 2026-09-23: 77
- 2026-09-22: 77
- 2026-09-21: 76
- 2026-09-20: 76
- 2026-09-19: 75
- 2026-09-18: 75
- 2026-09-17: 74
- 2026-09-16: 74
- 2026-09-15: 74
- 2026-09-14: 73
- 2026-09-13: 73
- 2026-09-12: 69
- 2026-09-11: 69
- 2026-09-10: 69
- 2026-09-09: 69
- 2026-09-08: 69
- 2026-09-07: 69
- 2026-09-06: 69
- 2026-09-05: 54

## Common questions

### What is the io.github.esperanza-volkov/confdiff-mcp server?

io.github.esperanza-volkov/confdiff-mcp is listed in the public MCP registry as io.github.esperanza-volkov/confdiff-mcp. Semantic, format-aware diff of config files (JSON/YAML/TOML/INI/.env/XML/CSV) for AI agents. This page covers its npm package (confdiff-mcp).

### Is the io.github.esperanza-volkov/confdiff-mcp server safe to use?

io.github.esperanza-volkov/confdiff-mcp scores 78 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 24 September 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 io.github.esperanza-volkov/confdiff-mcp server expose?

io.github.esperanza-volkov/confdiff-mcp exposes 2 tools: diff_configs, diff_config_files. Their descriptions and schemas cost roughly 711 tokens of context every time the server is loaded.

### Is the io.github.esperanza-volkov/confdiff-mcp server still maintained?

io.github.esperanza-volkov/confdiff-mcp is still listed as active in the MCP registry. We last reached this channel on 24 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 io.github.esperanza-volkov/confdiff-mcp server under?

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