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R3

Official registry Media and design

Build 3D web apps: physics, audio, music, Blender import. Live edits, undo, versions, publishing.

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 r3 'https://mcp.r3js.org/mcp' --header 'Authorization: <Optional. Leave empty to sign in with R3 (OAuth). Or Bearer r3agent_… from r3js.org → Settings → AI & apps>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "r3": {
            "type": "http",
            "url": "https://mcp.r3js.org/mcp",
            "headers": {
                "Authorization": "<Optional. Leave empty to sign in with R3 (OAuth). Or Bearer r3agent_… from r3js.org → Settings → AI & apps>"
            }
        }
    }
}

Frequently asked questions

What is R3?

Build 3D web apps: physics, audio, music, Blender import. Live edits, undo, versions, publishing.

How do I install R3?

It runs as a remote server. In Claude Code: claude mcp add --transport http r3 'https://mcp.r3js.org/mcp' --header 'Authorization: <Optional. Leave empty to sign in with R3 (OAuth). Or Bearer r3agent_… from r3js.org → Settings → AI & apps>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does R3 need an API key?

Yes. It expects Authorization, which you set in its configuration.

Who maintains R3?

It is published by org.r3js. 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.