Talk to Your Accessibility Data
Connect Rocket Validator to Claude, Codex, and OpenCode through our MCP server. Ask questions in natural language and get instant insights about your site's accessibility and HTML compliance.
Ask Questions Like You Would Ask a Colleague
No complex queries. No API documentation. Just natural conversations.
Looking at your reports from the last 30 days, staging.acme-corp.com needs the most attention:
- 847 accessibility issues across 124 pages
- Critical issues include missing alt text on 156 images
- 42 form fields without proper labels
- Color contrast failures on the checkout flow
- Non-standard HTML syntax was found
Would you like me to break down the most impactful fixes you could make?
Here are 3 quick wins that will fix 40% of your issues:
- Add alt attributes to product images - this single fix addresses 156 violations
-
Associate labels with form inputs
using the
forattribute - fixes 42 issues - Increase text contrast on `.btn-secondary` class from 3.2:1 to 4.5:1
Built for How Teams Actually Work
For Managers
Sarah runs the QA team at a digital agency. Every Monday, she used to spend 2 hours pulling data from multiple reports to prepare the weekly accessibility summary for stakeholders.
Now she just asks:
In seconds, she has a complete picture — ready to share with the team or export for the executive report.
For Developers
Marcus is a frontend developer who just inherited a legacy codebase. The site has thousands of pages and he needs to prioritize what to fix first.
Instead of clicking through endless report pages, he asks:
He gets a prioritized action plan that turns a daunting task into a clear roadmap.
For Marketing
Peter works in marketing and wants to highlight how their company leads on accessibility compared to competitors. Gathering competitive data manually would take days.
Now he just asks:
He gets a competitive analysis showing they have 60% fewer critical issues — a compelling story for the next investor pitch.
For QA Engineers
Elena leads responsive QA at a web agency. She needs to ensure sites are accessible across all devices — but manually comparing desktop and mobile reports is tedious.
Now she simply asks:
In minutes, she discovers that mobile has 4 extra critical issues — buttons without labels and images missing alt text that only appear on smaller screens.
Everything You Need, One Question Away
The MCP server gives AI assistants direct access to your Rocket Validator data.
📊 Browse Reports
List, filter, and search through your validation reports. Find reports by URL, tag, date, or issue count.
🔍 Analyze Issues
Dive deep into HTML and accessibility issues. See which problems affect the most pages and get fixing guidance.
📄 Inspect Pages
Check specific web pages within your reports. See all issues affecting a page and their exact locations.
📚 Get Guidance
Access built-in HTML and accessibility guides. Understand why an issue matters and how to fix it properly.
👥 Team Support
Works with guest accounts. Choose to see data from your own reports or from your team.
🚀 Create Reports
Ask the AI to run new validation reports on demand and recheck specific pages.
Works with Your AI Assistant
Any MCP client with Streamable HTTP and OAuth 2.0 connects out of the box — including Claude, Codex, and OpenCode.
Start a Conversation with Your Accessibility Data
Talk naturally with your validation reports. No complex queries needed. Here are some conversation starters:
What's the most urgent issue to fix on our web site?
Is our client site's accessibility improving or getting worse?
Explain what the 'landmark-one-main' accessibility rule means
Compare HTML errors between our staging and production sites
What's the most common issue across all my sites?
Give me the simplest HTML issue to fix and a detailed guide for our junior developer
Run a new accessibility report on https://example.com
Recheck the homepage now that I've fixed those alt text issues
Ready to try it?
Connect your Rocket Validator account to your AI assistant and start talking to your accessibility data.
Tools Included in the MCP Server
When you connect the Rocket Validator MCP to your AI assistant, it gets access to these specialized tools to help you work with your validation data.
Reports
List, filter, search, and create validation reports. Find reports by URL, tag, date, or issue count. With write permissions, your assistant can also create new reports on demand.
- Show me all reports from the last week
- Which reports have the most accessibility errors?
- Create a new report for https://example.com with 50 pages
Web Pages
Browse and inspect individual web pages within your reports. See all issues affecting a specific page, filter by issue types, and recheck pages after fixing issues (with write permissions).
- Show me the pages with the most HTML errors in my latest report
- Which pages are affected by the alt text issue?
- Recheck the pricing page
Common Issues
See HTML and accessibility issues aggregated across your entire report — W3C Validator, Axe Core, and AccessLint Core, plus the Axe checks that need manual review. Find out which problems affect the most pages, so you can prioritize fixes that have the biggest impact.
- What's the most common HTML error across all pages?
- Which WCAG 2.1 Level AA violations affect the most pages?
- Which critical AccessLint issues affect the most pages?
Page-Level Issues
Dive into specific issues on individual pages: exact code snippets, line numbers, severity (critical, serious, moderate, minor), and affected elements — across all three engines, including the findings that need manual review.
- Show me all critical accessibility issues on the checkout page
- List all color contrast issues on the homepage
- What needs manual review on the pricing page?
Guides
Access a comprehensive knowledge base of HTML and accessibility guides — W3C Validator, Axe Core (with WCAG references), and AccessLint Core. Learn why each issue matters and get step-by-step instructions on how to fix it.
- Explain what "duplicate ID" means and how to fix it
- Explain the "landmark-one-main" accessibility rule
- How do I fix distinguishable/color-contrast?
Schedules
View and manage your scheduled validation reports. See when schedules last ran, what they're configured to check, browse the reports they've generated — and create new schedules with write access.
- Show me all my scheduled reports
- When did my production schedule last run?
- Create a weekly schedule for https://example.com with Axe and AccessLint checks
Mutings
Manage rules that suppress specific validation issues. View your existing muting rules, see which are active in a report, and create new rules to hide known issues (with write permissions).
- Show me all my muting rules
- Which mutings are active in this report?
- Create a muting rule for legacy pages with heading-order issues
Devices
Browse available device configurations for validation. See different viewport sizes and user agents you can use when creating reports to test how your site works on desktop, mobile, and tablet devices.
- Show me all available mobile devices
- What device was used for this report?
- Create a report using iPhone viewport
Info
Get general information about Rocket Validator including validation engines (W3C Validator Nu for HTML, Axe Core and AccessLint Core for accessibility), available plans, and pricing details.
- What validation engines does Rocket Validator use?
- Show me the available pricing plans
- What's included in the 10K Monthly plan?
Start exploring your data
Connect your Rocket Validator reports to your AI assistant and get instant insights.
Frequently Asked Questions
What is MCP?
MCP (Model Context Protocol) is an open standard that lets AI assistants like Claude, Codex, and OpenCode connect to external data sources. Think of it as giving your assistant the ability to "see" your Rocket Validator reports directly, instead of you having to copy-paste data.
Which AI assistants are supported?
Claude, Codex, and OpenCode all work out of the box. See the setup guide for per-client instructions.
Is my account safe?
Yes. We use the OAuth 2.0 industry standard to securely connect your Rocket Validator data to your AI assistant. It cannot delete any of your data — it can only read your existing reports and, if you grant write access, create new reports or re-validate web pages on your behalf.
Can my AI assistant create reports on my behalf?
Yes, if you grant write access when authorizing the connection. With write access, your assistant can create new validation reports on demand and re-validate specific web pages. This is useful when you want to run a fresh validation or recheck pages after you've made fixes. If you only need to browse existing reports, read-only access is enough.
Do I need a paid Rocket Validator plan?
Yes. You need an active paid Rocket Validator subscription. The MCP is included on every plan. Check out our Pricing page to choose your subscription plan.
What do I need on the AI side?
Claude's custom connectors require Claude Pro, Max, or Team — the free tier does not support them. Codex and OpenCode need no paid tier for MCP access. See the setup guide for details.
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