# io.github.MasonChow/source-map-parser-mcp (npm · source-map-parser-mcp)

Parse JavaScript error stack traces back to original source code using source maps

- Trust score: 59/100 (low)
- Change this week: −11
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `source-map-parser-mcp`: 59/100 (this document), [markdown](https://verifymcp.io/servers/masonchow-source-map-parser-mcp/source-map-parser-mcp.md), [page](https://verifymcp.io/servers/masonchow-source-map-parser-mcp/source-map-parser-mcp)

## Channel facts

- Registry: `npm`
- Package: `source-map-parser-mcp`
- Version: `1.3.2`
- 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 2026-08-03.

- **Supply Chain Security**: 97/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 1 of 1 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 44/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (ISC).
  - Actively maintained (last published 308 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 57/100
  - AI-judged instruction clarity (fair).
  - Context-footprint check failed: tool/resource definitions use about 304 tokens (~152/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**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **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.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### Claude

```bash
claude mcp add masonchow-source-map-parser-mcp -- npx -y source-map-parser-mcp
```

### Codex

```bash
codex mcp add masonchow-source-map-parser-mcp -- npx -y source-map-parser-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add masonchow-source-map-parser-mcp --command npx --arg -y --arg source-map-parser-mcp
```

### Hermes

```yaml
mcp_servers:
  masonchow-source-map-parser-mcp:
    command: "npx"
    args: ["-y", "source-map-parser-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "masonchow-source-map-parser-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "source-map-parser-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.

### 2026-07-31 (score 59, −11)

- [security regression] Malware scan: pass → unverified
- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-27 (score 70, +25)

- [functional improvement] Tool coverage: unverified → 100
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: fair
- [functional] First check of Tool coverage: 0

### 2026-07-26 (score 45)

First indexed and scored.

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

## MCP tools (2)

### `operating_guide` (~62 tokens)

\# Parse Error Stack Trace

  This tool allows you to parse error stack traces by mapping them to the corresponding source code locations using source maps.
  It is particularly useful for debugging production errors where the stack trace points to minified or obfuscated code.

### `parse_stack` (~242 tokens)

\# Parse Error Stack Trace

  This tool allows you to parse error stack traces by providing the following:
  \- A downloadable source map URL.
  \- The line and column numbers from the stack trace.

  The tool will map the provided stack trace information to the corresponding source code location using the source map.
  It also supports fetching additional context lines around the error location for better debugging.

  \## Parameters:
  \- **stacks**: An array of stack trace objects, each containing:
    - **line**: The line number in the stack trace.
    - **column**: The column number in the stack trace.
    - **sourceMapUrl**: The URL of the source map file corresponding to the stack trace.

  \- **ctxOffset** (optional): The number of additional context lines to include before and after the error location in the source code. Defaults to 5.

  \## Returns:
  \- A JSON object containing the parsed stack trace information, including the mapped source code location and context lines.
  \- If parsing fails, an error message will be returned for the corresponding stack trace.

Input parameters:

- `stacks` (array, required)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/masonchow-source-map-parser-mcp/source-map-parser-mcp#diagnostics

## Score history

- 2026-08-03: 59
- 2026-08-02: 59
- 2026-08-01: 59
- 2026-07-31: 59
- 2026-07-29: 70
- 2026-07-28: 70
- 2026-07-27: 70
- 2026-07-26: 45

## Links

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