WebAbility

The server registers aninstructionsblock on initialize, so any MCP-compatible client picks up business context (what tool to call when, the three-tier output convention, etc.) automatically — no setup required beyond the install below.

Most accessibility MCP servers stop atfindandsuggest. WebAbility closes the whole loop in your editor, and starts free:

- Free, local scan — no account, no Docker.scan_pageruns entirely on your machine. (Deque's axe MCP needs a paid subscription, an API key, and a Docker install just to analyze a page.)
- Fixes that fit your stack.generate_ai_fixreturns ready-to-paste code for the framework you actually use — Tailwind, MUI, Bootstrap, WordPress, Next.js — not generic guidance.
- A vision pass DOM scanners can't do.visual_auditcatches focus visibility, icon contrast, and "looks like a button but isn't" — issues axe-core structurally cannot see.
- Verification, not just detection.verify_fixre-checks that your fix actually landed and returnsverified: true/false. Every 2026 comparison of accessibility MCPs names this the biggest gap in the category — most tools never close it.
- Evidence for compliance.start_auditproduces a persistent, timestamped report and Excel workbook you can hand to an auditor — not a result that vanishes with your session.

The full cycle, without leaving the editor:scan_page→generate_ai_fix→verify_fix, thenstart_auditwhen you need the paper trail.

{ "mcpServers": { "webability": { "command": "webability-mcp" } } }

Optional env:WEBABILITY_API_URL(defaulthttps://api.webability.io) for self-hosted backends.

scan_pageruns three engines in parallel and deduplicates the results:

- issues— high-confidence violations, safe to surface as bugs
- incomplete— findings that need human review (contrast against gradients, marketing imagery, framer-motion pre-animation states, axe-incomplete).Never auto-fix these.
- summary— counts by severity + anincompletecount

This mirrors axe-core'sviolations/incomplete/passessplit and prevents agents from "fixing" false positives in destructive ways.

- Building a new component and want it accessible from day one
- Auditing a localhost / staging build before pushing
- Triaging a Lighthouse / axe report —scan_pageconsolidates all three engines
- Generating fix suggestions that match the framework you're already using
- Checking color contrast against the user's actual brand palette (not generic suggestions)

"Scan localhost:3000 for accessibility issues"

"Walk login → dashboard → checkout and report unique issues across the flow"

"What does WCAG 1.4.11 check?"

Every scan is loggedlocallyto~/.webability/scans/— a one-line-per-scanindex.jsonlledger plus the full result of your last 500 scans. Browse them with thescan_historytool ("what did we scan earlier?") or plainjq. SetWEBABILITY_SCAN_LOG=offto disable,WEBABILITY_SCAN_LOG_DIRto relocate.

The server also reports one smalltelemetry eventper tool call (every tool, not just scans) to the WebAbility API: tool name, a short target label (URL, selector, issue type — never page content), pass/fail, duration, issue counts, and a persistent anonymous install ID. Full scan results, HTML, and generated fix code never leave your machine via telemetry. SetWEBABILITY_SCAN_TELEMETRY=offto opt out.

Keywords: web accessibility, accessibility testing, WCAG 2.2 AA, ADA compliance, Section 508, EAA, AODA, a11y, accessibility scanner, color contrast checker, ARIA validation, alt text, keyboard navigation, screen reader, MCP server, accessibility for AI coding agents.

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