# Source Map Parser

> Use this tool when you need to debug production JavaScript errors by mapping minified stack traces back to their original source code locations. It solves the problem of identifying error sources in minified or transpiled code, taking in error stack traces and source map URLs as input, and outputting the original source location with contextual code lines. It is particularly useful in production environments where code is compressed, providing efficient source map parsing through a simple interface.

Canonical page: https://skillsregistry.net/skills/masonchow-source-map-parser  
JSON: https://api.skillsregistry.net/v1/skills/masonchow-source-map-parser

## Description

Source Map Parser MCP provides a specialized tool for debugging production JavaScript errors by mapping minified stack traces back to their original source code locations. Built by MasonChow, this server implementation leverages WebAssembly for efficient source map parsing and offers a simple interface to process error stack traces with line and column information. The implementation fetches source maps from provided URLs, parses them using the stack_parser_js_sdk, and returns the original source location along with contextual code lines, making it particularly valuable for developers troubleshooting errors in production environments where code is minified or transpiled.

## Trust

- **Trust score (0–1):** 0.94
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** maps-location
- **Updated:** 2026-09-28

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/masonchow-source-map-parser)
- **Repository:** <https://github.com/masonchow/source-map-parser-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "masonchow-source-map-parser"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/masonchow-source-map-parser` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/masonchow-source-map-parser/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt