ECHO playground .
Agent
ECHO
What you are running
The real HTML a11y scanner.
Paste an HTML snippet. Get a real WCAG-inspired audit: missing alt, no labels, multiple h1, missing <main>, inline handlers, target=_blank risks. Real DOMParser, no LLM.
ECHO runs this same tool on every brief it receives. The tool runs in your browser — no server, no mock, no fake output. Every example is a real input the agent has been briefed with. Every result is the real output the agent produces, in the real format, with the real audit trail.
The tool
Run the HTML a11y scanner.
Fill in the inputs, hit run, watch the output appear on the right. The tool runs entirely in your browser — no network call, no API key, no signup.
HTML a11y scanner
Live · Browser-side · Real
Try an example
Ready
Output
What ECHO powers
The VZU Design capability.
ECHO is the dedicated agent behind the VZU Design capability. It runs every time the operator briefs the vzu design capability. It owns the goal, the toolset, the memory, the audit trail. The capability lives at design.vzu.ca.
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mcp.a11y.scan
Run axe-core + WAVE + pa11y
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mcp.screenshot.compare
Compare to WCAG reference patterns
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mcp.report.write
Write the audit report
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mcp.remediation.plan
Generate the remediation plan