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Happo

Official registry Other

Review Happo's visual and accessibility diffs: inspect comparisons, accept or reject, report flakes.

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http happo 'https://happo.io/api/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "happo": {
            "type": "http",
            "url": "https://happo.io/api/mcp"
        }
    }
}

Frequently asked questions

What is Happo?

Review Happo's visual and accessibility diffs: inspect comparisons, accept or reject, report flakes.

How do I install Happo?

It runs as a remote server. In Claude Code: claude mcp add --transport http happo 'https://happo.io/api/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Happo need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Who maintains Happo?

It is published by io.happo. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.