How do I install the val MCP server?

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "val": { "command": "npx", "args": ["-y", "val"] } }

QA agent for vibecoded apps. Real browser checks, your AI fixes them. Ship to green.

Is the val MCP server free to use?

Yes. val is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

How do I install the val MCP server?

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "val": { "command": "npx", "args": ["-y", "val"] } }

QA agent for vibecoded apps. Real browser checks, your AI fixes them. Ship to green.

Is the val MCP server free to use?

Yes. val is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Documentation Overview

Val QA scan — GitHub Action

Run Val, the QA agent for vibecoded apps, on every PR. Val drives a real browser against your preview URL, catches broken links, dead buttons, busted layouts, accessibility violations, and posts a report as a PR comment.

Requires a Val subscription

Val is a paid product. Get a license key at val.nyx-intelligence.com, store it as a repository secret (e.g. VAL_LICENSE_KEY), and pass it to the action.

Quick start

yaml

name: Val QA
on: pull_request

jobs:
  qa:
    runs-on: ubuntu-latest
    steps:
      - name: Deploy preview
        id: deploy
        # ... your preview deployment step (Vercel, Netlify, etc.) ...
        # outputs.url should be the preview URL

      - name: Val scan
        uses: nyx-intelligence/val-action@v1
        with:
          url: ${{ steps.deploy.outputs.url }}
          license-key: ${{ secrets.VAL_LICENSE_KEY }}
          devices: 'desktop,iPhone 14'
          fail-on: 'high'

Inputs

Name	Default	Description
`url`	(required)	The URL Val should scan. Pass your preview deployment URL.
`license-key`	(required)	Your Val license key (`vk_...`). Get one at val.nyx-intelligence.com.
`max-pages`	`12`	Maximum same-origin pages to crawl.
`devices`	`desktop`	Comma-separated device profiles, e.g. `desktop,iPhone 14,Pixel 7`.
`fail-on`	`high`	Severity that fails the action: `high`, `medium`, `low`, or `never`.
`comment`	`true`	Post the report as a PR comment (`true` / `false`).
`github-token`	`${{ github.token }}`	Token used to post the PR comment.

Outputs

Name	Description
`high`	Number of high-severity findings.
`medium`	Number of medium-severity findings.
`low`	Number of low-severity findings.
`report-path`	Path to the raw report file.

What Val checks

Broken links and 4xx/5xx responses
Uncaught JS errors and console errors
Broken/missing images
Horizontal layout overflow on mobile
Clipped text in fixed containers
Cumulative Layout Shift (janky load)
A11y essentials: missing alt, unnamed buttons, unlabeled inputs, missing <html lang>
Multi-device: catches bugs that appear only on mobile or only on desktop

Permissions

The action needs pull-requests: write to post comments:

yaml

permissions:
  contents: read
  pull-requests: write

Documentation Overview

Val QA scan — GitHub Action

Requires a Val subscription

Val is a paid product. Get a license key at val.nyx-intelligence.com, store it as a repository secret (e.g. VAL_LICENSE_KEY), and pass it to the action.

Quick start

yaml

name: Val QA
on: pull_request

jobs:
  qa:
    runs-on: ubuntu-latest
    steps:
      - name: Deploy preview
        id: deploy
        # ... your preview deployment step (Vercel, Netlify, etc.) ...
        # outputs.url should be the preview URL

      - name: Val scan
        uses: nyx-intelligence/val-action@v1
        with:
          url: ${{ steps.deploy.outputs.url }}
          license-key: ${{ secrets.VAL_LICENSE_KEY }}
          devices: 'desktop,iPhone 14'
          fail-on: 'high'

Inputs

Name	Default	Description
`url`	(required)	The URL Val should scan. Pass your preview deployment URL.
`license-key`	(required)	Your Val license key (`vk_...`). Get one at val.nyx-intelligence.com.
`max-pages`	`12`	Maximum same-origin pages to crawl.
`devices`	`desktop`	Comma-separated device profiles, e.g. `desktop,iPhone 14,Pixel 7`.
`fail-on`	`high`	Severity that fails the action: `high`, `medium`, `low`, or `never`.
`comment`	`true`	Post the report as a PR comment (`true` / `false`).
`github-token`	`${{ github.token }}`	Token used to post the PR comment.

Outputs

Name	Description
`high`	Number of high-severity findings.
`medium`	Number of medium-severity findings.
`low`	Number of low-severity findings.
`report-path`	Path to the raw report file.

What Val checks

Broken links and 4xx/5xx responses
Uncaught JS errors and console errors
Broken/missing images
Horizontal layout overflow on mobile
Clipped text in fixed containers
Cumulative Layout Shift (janky load)
A11y essentials: missing alt, unnamed buttons, unlabeled inputs, missing <html lang>
Multi-device: catches bugs that appear only on mobile or only on desktop

Permissions

The action needs pull-requests: write to post comments:

yaml

permissions:
  contents: read
  pull-requests: write

Val

Quick Install

Install Config Generator

Documentation Overview

Val QA scan — GitHub Action

Requires a Val subscription

Quick start

Inputs

Outputs

What Val checks

Permissions

Related MCP Servers

Frequently Asked Questions about Val

AllMCPs Directory Badge

Technical Specs & Signals

Feature Your MCP Server

Own this project?

Share & Embed

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Val

Quick Install

Install Config Generator

Documentation Overview

Val QA scan — GitHub Action

Requires a Val subscription

Quick start

Inputs

Outputs

What Val checks

Permissions

Related MCP Servers

Frequently Asked Questions about Val

AllMCPs Directory Badge

Technical Specs & Signals

Feature Your MCP Server

Own this project?

Share & Embed

Explore more