MarvinLabs vram_fit MCP Server

by marvinlabs Your server? Claim it

answering

MarvinLabs vram_fit is answering right now. Last checked 3 min ago. It exposes 3 tools.

Will a QLoRA fine-tune of gemma-3-4b-it fit your GPU? Verdicts from measured AMD and NVIDIA probes.

Uptime history 17 days of history · worst day 99%

17 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

180 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check MarvinLabs vram_fit every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add vram-fit --transport http https://marvinlabs.org/mcp

Settings → Connectors → Add custom connector, then paste this address

https://marvinlabs.org/mcp

~/.codex/config.toml

[mcp_servers.vram-fit]
url = "https://marvinlabs.org/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "vram-fit": {
      "url": "https://marvinlabs.org/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "vram-fit": {
      "type": "http",
      "url": "https://marvinlabs.org/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

vram

vram_fit

Will this LoRA config train on a card with vram_gb GB? Returns verdict fits / tight / does_not_fit, the predicted peak in MB, the margin, how each part was derived, and any measured probe with the same settings.

vram_max_rank

Largest LoRA rank (multiple of 8) that fits with margin on a card with vram_gb GB, and the largest that is tight (a real run may fit, the one-step probe would not).

vram_probes

The raw measured probe rows (RX 7900 XTX and RTX 3060 Ti), filtered by any of the given settings. gpu matches part of the card name, e.g. '7900' or '3060'.

Endpoints

URL	Transport	State	Latency	Checked
https://marvinlabs.org/mcp	streamable-http	answering	193 ms	3 min ago

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MarvinLabs vram_fit — questions

Answers built from our own checks of this server.

What can MarvinLabs vram_fit do?

It exposes 3 tools, read directly from the server on our last check. Among them: vram_fit, vram_max_rank, vram_probes. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is MarvinLabs vram_fit working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 180 ms. The bar chart above shows every period we have measured.

How do I connect MarvinLabs vram_fit?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does MarvinLabs vram_fit need an API key?

No. MarvinLabs vram_fit completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is MarvinLabs vram_fit?

It answers our handshake in 180 ms on average, which is faster than 73% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.