# walkerOS Source Browser (npm · @walkeros/mcp-source-browser)

Generate, parse, and validate walkerOS data-elb HTML tagging attributes

- Trust score: 90/100 (high trust)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-21

## Components

- npm · `@walkeros/mcp-source-browser`: 90/100 (this document), [markdown](https://verifymcp.io/servers/io-walkeros-source-browser/walkeros-mcp-source-browser.md), [page](https://verifymcp.io/servers/io-walkeros-source-browser/walkeros-mcp-source-browser)

## Channel facts

- Registry: `npm`
- Package: `@walkeros/mcp-source-browser`
- Version: `4.5.0`
- 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 2026-09-21.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 39 of 137 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to elbwalker/walkerOS).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 6 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 81/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 369 tokens (~73/item across 5 items; 3 tools + 2 resources), lean.
  - 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.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **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 walkerOS Source Browser MCP server?

walkerOS Source Browser runs locally as an npm package, launched with npx -y @walkeros/mcp-source-browser. 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 io-walkeros-source-browser -- npx -y @walkeros/mcp-source-browser
```

### Cursor

```json
{
  "mcpServers": {
    "io-walkeros-source-browser": {
      "command": "npx",
      "args": [
        "-y",
        "@walkeros/mcp-source-browser"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-walkeros-source-browser": {
      "command": "npx",
      "args": [
        "-y",
        "@walkeros/mcp-source-browser"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add io-walkeros-source-browser -- npx -y @walkeros/mcp-source-browser
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add io-walkeros-source-browser --command npx --arg -y --arg @walkeros/mcp-source-browser
```

### Hermes

```yaml
mcp_servers:
  io-walkeros-source-browser:
    command: "npx"
    args: ["-y", "@walkeros/mcp-source-browser"]
```

### Netclaw

```json
{
  "McpServers": {
    "io-walkeros-source-browser": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@walkeros/mcp-source-browser"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-walkeros-source-browser -t stdio -c npx -a -y @walkeros/mcp-source-browser
```

### Other

```json
{
  "mcpServers": {
    "io-walkeros-source-browser": {
      "command": "npx",
      "args": [
        "-y",
        "@walkeros/mcp-source-browser"
      ]
    }
  }
}
```

## 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.

### 2026-09-20 (score 90, +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.

### 2026-09-18 (score 89, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 88, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 87, +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.

### 2026-09-11 (score 86, +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.

### 2026-09-10 (score 85, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-09-03 (score 81, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-02 (score 66)

First indexed and scored.

## MCP tools (3)

### `generate_tagging` (~202 tokens)

Generate Tagging

Generate walkerOS data-elb HTML attributes from structured input. Returns attribute key-value pairs and an example HTML snippet.

Input parameters:

- `action` (object): Trigger:action pairs for data-elbaction (nearest entity only)
- `actions` (object): Trigger:action pairs for data-elbactions (all entities)
- `context` (object): Context properties for data-elbcontext
- `data` (object): Entity properties as key:value pairs
- `entity` (string): Entity name (creates data-elb="entity" and scopes data-elb-entity properties)
- `globals` (object): Global properties for data-elbglobals
- `link` (object): Link relationships for data-elblink (id:type, e.g. {"details":"parent"})
- `prefix` (string): Custom prefix (default: data-elb)
- `scoped` (object): Path-scoped generic properties for data-elb_ (only triggers nested below this element receive them)

Output parameters:

- `attributes` (object): Generated HTML data attributes
- `html` (string): Example HTML element with the attributes applied

### `parse_tagging` (~71 tokens)

Parse Tagging

Parse HTML with data-elb attributes using real DOM parsing (JSDOM). Extracts all walkerOS events and globals. Use validate_tagging for issue detection.

Input parameters:

- `html` (string, required): HTML snippet with data-elb attributes
- `prefix` (string): Custom prefix (default: data-elb)

Output parameters:

- `events` (array): Extracted walkerOS events
- `globals` (object): Global properties
- `summary` (string): Human-readable summary

### `validate_tagging` (~59 tokens)

Validate Tagging

Validate HTML data-elb tagging for common mistakes. Checks for orphan actions, missing entities, unknown triggers, and more.

Input parameters:

- `html` (string, required): HTML snippet to validate
- `prefix` (string): Custom prefix (default: data-elb)

Output parameters:

- `errors` (array): Critical issues
- `info` (array): Informational notes
- `summary` (string): Human-readable validation summary
- `valid` (boolean): True if no errors found
- `warnings` (array): Potential issues

## Diagnostics

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

## Score history

- 2026-09-21: 90
- 2026-09-20: 90
- 2026-09-19: 89
- 2026-09-18: 89
- 2026-09-17: 88
- 2026-09-16: 88
- 2026-09-15: 87
- 2026-09-14: 87
- 2026-09-13: 87
- 2026-09-12: 86
- 2026-09-11: 86
- 2026-09-10: 85
- 2026-09-09: 81
- 2026-09-08: 81
- 2026-09-07: 81
- 2026-09-06: 81
- 2026-09-05: 81
- 2026-09-04: 81
- 2026-09-03: 81
- 2026-09-02: 66

## Common questions

### What is the walkerOS Source Browser MCP server?

walkerOS Source Browser is an MCP server listed in the public MCP registry as io.walkeros/source-browser. Generate, parse, and validate walkerOS data-elb HTML tagging attributes. This page covers its npm package (@walkeros/mcp-source-browser).

### Is the walkerOS Source Browser MCP server safe to use?

walkerOS Source Browser scores 90 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 21 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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 walkerOS Source Browser MCP server expose?

walkerOS Source Browser exposes 3 tools: generate_tagging, parse_tagging, validate_tagging. Their descriptions and schemas cost roughly 332 tokens of context every time the server is loaded.

### Is the walkerOS Source Browser MCP server still maintained?

walkerOS Source Browser is still listed as active in the MCP registry. We last reached this channel on 21 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 walkerOS Source Browser MCP server under?

walkerOS Source Browser 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/@walkeros/mcp-source-browser
- Socket report: https://socket.dev/npm/package/@walkeros/mcp-source-browser
- Repository: https://github.com/elbwalker/walkerOS
- Website: https://www.walkeros.io/docs/apps/mcp
- Changelog RSS feed: https://verifymcp.io/servers/io-walkeros-source-browser/walkeros-mcp-source-browser.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-walkeros-source-browser/walkeros-mcp-source-browser.json
- HTML version of this page: https://verifymcp.io/servers/io-walkeros-source-browser/walkeros-mcp-source-browser