R3 MCP server
Build interactive 3D web apps — scenes, physics, audio and music — from composable components.
C60/100grade C
Adoption
New
Little public usage data yet
Reviews
Write oneNobody has reviewed R3 yet.
If you have run it, two minutes of your experience saves the next person an afternoon.
R3 tools
Tool list not cached yet. `describe` through the gateway fetches it live.
Public scan report
scanner v0.1.9 · 2026-09-20 · same rubric, same numbers if you re-run it
1 low
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 763ms (auth required)20/20
- –Tool poisoningtools not inspected (endpoint requires auth); not countedn/a
- Auth qualityauth enforced (bearer)9/15
- Maintenanceno repository listed3/15
- Maintainer identityverified namespace with website, no repo4/10
Findings (1)
- lowNo source repository listed
maint.no-repo
Overall 60/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON
Install directly
claude mcp add --transport http r3 https://mcp.r3js.org/mcp
R3: common questions
- Is R3 MCP server safe?
- With care: it is graded C, so read the findings first (60/100). Read the R3 safety report
- How do I install R3?
- It runs remotely at mcp.r3js.org. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does R3 need an API key?
- Yes. The endpoint refuses requests without credentials; the publisher's docs say how to get them.
- Is R3 maintained?
- The latest release is v1.2.0.
- Is R3 up?
- 100% of our last 6 checks got an answer. We check remote servers about four times a day.
- What can I use instead of R3?
- Servers from other publishers that do the same job: Familiar MCP server, Macos MCP server and Bluecolumn Memory MCP server. Compare all R3 alternatives.
Alternatives to R3
Same job from other publishers: the closest match first, then the best rated.
FamiliarAI co-pilot for Foundry VTT: runs combat, scenes, voices and audio. Requires the Familiar module.not reviewedGrowingB- MacosControl macOS system settings, apps, windows, audio, displays, screenshots, and Focus mode via MCP.not reviewedGrowingA
- Bluecolumn MemoryPersistent memory for AI agents — audio intelligence + Music Memory ingestion and recallnot reviewedGrowingB
Tegas AIAI video production for marketing and social media: script, scenes, voice-over, subtitles, music.not reviewedGrowingA- NotebookLM MCPAutomate Google NotebookLM — Q&A with citations, audio, video, content generationnot reviewedEstablishedC
