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Diagrams MCP server

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by mskry·io.github.mskry/diagrams-mcp-server·v0.1.2·3 stars
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Generate cloud architecture diagrams, flowcharts, and sequence diagrams.

C58/100grade C
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Safety scan
C58/100

full report

Adoption
New

3 stars

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Diagrams MCP tools

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Public scan report

scanner v0.1.9 · 2026-09-26 · same rubric, same numbers if you re-run it

1 high
  • Code scan15 source files scanned25/25
  • Live reliabilityremote unreachable: Streamable HTTP error: Error POSTing to endpoint: {"status":"error","code":404,"message":"Application not found","request_id":"YO3LUfQQTdmuhhzS0_TJvA"}0/20
  • –Tool poisoningtools not inspected (endpoint requires auth); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 98 days ago8/15
  • Maintainer identitynamespace and repository owner differ4/10

Findings (1)

  • highRemote endpoint did not respondreliability.unreachable

    Streamable HTTP error: Error POSTing to endpoint: {"status":"error","code":404,"message":"Application not found","request_id":"YO3LUfQQTdmuhhzS0_TJvA"}

Overall 58/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Diagrams MCP compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
58/100
higher than 13% of 48,255 servers
Uptime
0%
of our recent checks; the typical remote server answers 100%
Response time
547 ms
faster than 27% of 30,031 servers
GitHub stars
3
more than 80% of 28,688 servers

Install Diagrams MCP in Claude Code, Cursor or VS Code

claude mcp add --transport http diagrams-mcp-server https://diagrams-mcp-production.up.railway.app/mcp
Add to Cursor

What the publisher says

From the Diagrams MCP repository's README, as published. We do not edit it. Read it on GitHub

diagrams-mcp-server

MCP server for generating cloud architecture diagrams, flowcharts, sequence diagrams, and more — powered by three rendering engines: mingrammer/diagrams, Mermaid, and PlantUML.

Getting Started

Hosted (Recommended)

Connect to the public hosted server — no installation required. All rendering engines and dependencies are pre-installed.

Claude Desktop

Add to your claudedesktopconfig.json (Settings → Developer → Edit Config):

{
  "mcpServers": {
    "diagrams-mcp": {
      "url": "https://diagrams-mcp-production.up.railway.app/mcp"
    }
  }
}

Claude Code (CLI)

Run:

claude mcp add diagrams-mcp https://diagrams-mcp-production.up.railway.app/mcp

Or add to your .mcp.json:

{
  "mcpServers": {
    "diagrams-mcp": {
      "url": "https://diagrams-mcp-production.up.railway.app/mcp"
    }
  }
}

Cursor

Add to your .cursor/mcp.json:

{
  "mcpServers": {
    "diagrams-mcp": {
      "url": "https://diagrams-mcp-production.up.railway.app/mcp"
    }
  }
}

Windsurf

Add to your ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "diagrams-mcp": {
      "serverUrl": "https://diagrams-mcp-production.up.railway.app/mcp"
    }
  }
}

VS Code

Add to your .vscode/mcp.json:

{
  "servers": {
    "diagrams-mcp": {
      "type": "http",
      "url": "https://diagrams-mcp-production.up.railway.app/mcp"
    }
  }
}

Local Installation

Prerequisites

Graphviz is required for the default local/in-process rendering mode. Mermaid CLI and PlantUML are optional — install them only if you need those specific rendering engines locally.

Note: The hosted server runs as a slim MCP facade plus a separate renderer service, and has all render dependencies pre-installed in the renderer. Local prerequisites only apply if you're running in-process rendering yourself.

Install the server

Via uvx (recommended):

uvx diagrams-mcp-server

Via pip:

pip install diagrams-mcp-server

From source:

pip install git+https://github.com/ByteOverDev/diagrams-mcp.git

Configure your MCP client

Claude Desktop

Add to your claudedesktopconfig.json (Settings → Developer → Edit Config):

uvx (recommended):

{
  "mcpServers": {
    "diagrams-mcp": {
      "command": "uvx",
      "args": ["diagrams-mcp-server"]
    }
  }
}

pip:

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Diagrams MCP: common questions

Is Diagrams MCP server safe?
With care: it is graded C, so read the findings first (58/100). Read the Diagrams MCP safety report
How do I install Diagrams MCP?
It runs remotely at diagrams-mcp-production.up.railway.app. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Diagrams MCP need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Diagrams MCP maintained?
The last commit was 137 days ago (2026-06-20). The latest release is v0.1.2.
Is Diagrams MCP up?
0% of our last 28 checks got an answer. We check remote servers about four times a day.
How does Diagrams MCP compare with other MCP servers?
safety score 58/100 (higher than 13% of 48,255 servers); uptime 0% (of our recent checks; the typical remote server answers 100%); response time 547 ms (faster than 27% of 30,031 servers). Full comparison.