MaterialsCodeGraph MCP Server

by materialscodegraph Your server? Claim it

answering

MaterialsCodeGraph is answering right now. Last checked 3 min ago.

Materials simulations for AI agents over MCP: binding token quote before every run, record after it.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 64 hours of history · worst hour 25%

64 hours agonow

95.6%

Uptime 24h

87 of 91 checks

—

Tools

hidden behind auth

189 ms

Response time

average over 24h

API key

Access

streamable-http

MaterialsCodeGraph does not always answer

Over the last week it answered 95.4% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

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 mcg --transport http https://api.materialscodegraph.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcg": {
      "url": "https://api.materialscodegraph.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mcg]
url = "https://api.materialscodegraph.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mcg": {
      "url": "https://api.materialscodegraph.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mcg": {
      "url": "https://api.materialscodegraph.com/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, but you need an API key from its owner to call it.

Endpoints

URL	Transport	State	Latency	Checked
https://api.materialscodegraph.com/mcp	streamable-http	needs key	189 ms	3 min ago

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MaterialsCodeGraph — questions

Answers built from our own checks of this server.

Why is there no tool list for MaterialsCodeGraph?

The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 95.6% of checks in the last 24 hours got a reply.

Is MaterialsCodeGraph working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 87 of 91 checks got a reply (95.6%), average response time 189 ms. The bar chart above shows every period we have measured.

Is MaterialsCodeGraph still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect MaterialsCodeGraph?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You will need your own key: it refuses anonymous clients.

Does MaterialsCodeGraph need an API key?

Yes. Every time we knock, MaterialsCodeGraph answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.

How fast is MaterialsCodeGraph?

It answers our handshake in 189 ms on average, which is faster than 72% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.