GOLEM-3DMCP-Rhino- (TheKingHippopotamus/GOLEM-3DMCP-Rhino-) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 89 tools. No publisher has claimed this listing.

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C
Emerging
74/100

GOLEM-3DMCP-Rhino-

GOLEM-3DMCP implements the Model Context Protocol to give AI agents direct, programmatic control of Rhino 8 — create geometry, run booleans, drive Grasshopper, capture viewports, and execute arbitrary Python scripts, all through natural language. Works with Claude Code, Cursor, Windsurf, and any MCP-compatible host.

→ TheKingHippopotamus/GOLEM-3DMCP-Rhino-· listed on glama

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

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Who stands behind it

TheKingHippopotamus

Source: Glama

Is this your MCP?

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configGOLEM_RHINO_HOSTRhino plugin host
configGOLEM_RHINO_PORTRhino plugin TCP port
configGOLEM_GH_PORTGrasshopper sub-server port
configGOLEM_TIMEOUTCommand timeout (seconds)
configGOLEM_HEAVY_TIMEOUTHeavy operation timeout (seconds)
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

89/89 tools missing one or more hints — create_box (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); create_sphere (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); create_cylinder (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +86 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

49/89 tools referenced in tests (55%)

Write tests that reference each tool by name so every tool has at least one test.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/thekinghippopotamus/golem-3dmcp-rhino-)](https://m8ven.ai/mcp/thekinghippopotamus/golem-3dmcp-rhino-)
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commit: 4dca49b996b939331df62b0e18f932600e9eeb12
code hash: 4ce280c3b86188ee81d10fd1cd1d02ca25f779ee8536f4e7afc5082f8604dcac
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