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io.github.ezrabrilliant/staruml-mcp

NPM · STARUML-MCP · SCANNED SEP 21

MCP server for StarUML — generate UML diagrams from AI agents via stdio or HTTP.

Available components

npm · staruml-mcp 94
0 this week 94 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →

Supply Chain Security98
  • No malware found by supply-chain analysis.Pass
  • No known CVEs affecting this package version or its production dependencies.Pass
  • No install/post-install scripts declared.Pass
  • 31 of 97 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency97
  • Source repository is publicly reachable at the declared URL. View diagnostics → Pass
  • Cryptographically verified build provenance (signed, bound to ezrabrilliant/staruml-mcp). View diagnostics → Pass
  • Clear OSI-approved license (MIT).Pass
  • Actively maintained (last published 152 days ago).Pass
  • Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability82
  • AI-judged instruction clarity (excellent).Pass
  • Tool/resource definitions use about 1501 tokens (~79/item across 19 items; 19 tools + 0 resources), lean.Pass
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management97
  • Stability observed for 29 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 100% of tool parameters carry a description.Pass
Tool Safety75
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • 0 of 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "execute_command" implies "execute" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
  • An AI judge read all 19 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Install

How do I install the io.github.ezrabrilliant/staruml-mcp server?

io.github.ezrabrilliant/staruml-mcp runs locally as an npm package, launched with npx -y staruml-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

npm · staruml-mcp

# add to Claude Code
claude mcp add ezrabrilliant-staruml-mcp -- npx -y staruml-mcp
// .cursor/mcp.json
{
  "mcpServers": {
    "ezrabrilliant-staruml-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "staruml-mcp"
      ]
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "ezrabrilliant-staruml-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "staruml-mcp"
      ]
    }
  }
}
# add to Codex CLI
codex mcp add ezrabrilliant-staruml-mcp -- npx -y staruml-mcp
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ezrabrilliant-staruml-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "staruml-mcp"
      ],
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add ezrabrilliant-staruml-mcp --command npx --arg -y --arg staruml-mcp
# ~/.hermes/config.yaml
mcp_servers:
  ezrabrilliant-staruml-mcp:
    command: "npx"
    args: ["-y", "staruml-mcp"]
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "ezrabrilliant-staruml-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "staruml-mcp"
      ]
    }
  }
}
# add to Vellum
assistant mcp add ezrabrilliant-staruml-mcp -t stdio -c npx -a -y staruml-mcp
// mcp.json
{
  "mcpServers": {
    "ezrabrilliant-staruml-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "staruml-mcp"
      ]
    }
  }
}
Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 21 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

  • 19 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

  • 18 Sept 26 0
    • Security disclosure: unverified → fail ▼ functional
  • 17 Sept 26 +1
    • Security disclosure: fail → unverified ▼ functional
  • 16 Sept 26 −3
    • Stability: pass → 0.80 functional
  • 15 Sept 26 0
    • Stability: 0.97 → pass security
  • 14 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

  • 13 Sept 26 0
    • Security disclosure: unverified → fail ▼ functional
Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 21 Sept 2026 · Analysed npm/staruml-mcp@0.2.0

Provenance Verified

A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.

Result Verified
Ecosystem npm
Reason Verified
Discovered via Registry attestation endpoint
Source repo ezrabrilliant/staruml-mcp
Certificate issuer https://token.actions.githubusercontent.com
Certificate SAN https://github.com/ezrabrilliant/staruml-mcp/.github/workflows/publish.yml@refs/tags/v0.2.0
Rekor log index 1341707866
Predicate type https://slsa.dev/provenance/v1
Subject digest sha512:2a3eb7705ed1e8cb96d389dbef18f16456ecabc682873a8285838fd8f7e430a5b688ab72b617c0ef710744d29e06da6a1f766c201ed68356c244fae46

Background: How many MCP packages publish verified provenance →

Dependencies 97 packages
Packages resolved 97
Stale 31
Tree resolution Complete

Background: SBOMs and build attestations, explained →

MCP tools · 19 exposed · ~1,501 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
close_diagram ~58

Close a diagram tab by its ID. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
idstringyesDiagram _id

No output schema declared.

No examples provided.

create_diagram ~201

Create a typed UML diagram. The 'type' is a metamodel class name (e.g. 'UMLClassDiagram', 'UMLUseCaseDiagram', 'UMLSequenceDiagram', 'UMLActivityDiagram', 'ERDDiagram'). Unlike generate_diagram (Mermaid), this gives a native empty diagram you can populate via create_element. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
namestring–Diagram name
parentIdstringyesParent element's _id (usually the project or a package)
typestringyesDiagram metamodel type: 'UMLClassDiagram', 'UMLUseCaseDiagram', 'UMLSequenceDiagram', 'UMLActivityDiagram', 'UMLStateDiagram', 'UMLComponentDiagram', 'UMLDeploymentDiagram', 'ERDDiagram'

No output schema declared.

No examples provided.

create_element ~121

Create a new UML model element. The 'type' is a metamodel class name (e.g. 'UMLClass', 'UMLPackage', 'UMLInterface'). Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
namestring–Optional element name
parentIdstringyesParent element's _id
typestringyesMetamodel type, e.g. 'UMLClass', 'UMLPackage'

No output schema declared.

No examples provided.

delete_element ~58

Delete an element from the project. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
idstringyesElement _id to delete

No output schema declared.

No examples provided.

execute_command ~102

Execute any built-in StarUML command by its ID. Use get_all_commands to discover available IDs. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
argsarray–Optional positional arguments passed to the command handler
idstringyesCommand ID. Examples: 'project:save', 'view:fit-to-window', 'project:new'

No output schema declared.

No examples provided.

find_elements ~108

Find elements by metamodel type and/or name. Examples: type='UMLClass', name='User'. Omit both to return all. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
namestring–Exact name match
typestring–Metamodel type. Examples: 'Project', 'UMLModel', 'UMLClass', 'UMLPackage'

No output schema declared.

No examples provided.

generate_diagram ~113

Generate a UML diagram in StarUML from Mermaid code. Supported Mermaid diagram types: classDiagram, sequenceDiagram, flowchart, erDiagram, mindmap, requirementDiagram, stateDiagram. StarUML must be running with apiServer enabled.

NameTypeReqDescription
codestringyesMermaid diagram source code. Must start with one of: classDiagram, sequenceDiagram, flowchart, erDiagram, mindmap, requirementDiagram, stateDiagram. Example: "flowchart LR\n A[Start] --> B[End]"

No output schema declared.

No examples provided.

get_all_commands ~79

List all registered StarUML command IDs (e.g. 'project:save', 'view:fit-to-window', 'alignment:align-left'). Useful to discover what execute_command can trigger. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

get_all_diagrams_info ~32

Get metadata (id, name, type) for all diagrams in the currently open StarUML project.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

get_current_diagram_info ~26

Get metadata for the currently active (focused) diagram in StarUML.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

get_diagram_image_by_id ~63

Retrieve a PNG image of a diagram by its ID. Use get_all_diagrams_info first to obtain IDs.

NameTypeReqDescription
diagramIdstringyesDiagram ID. Obtain from get_all_diagrams_info tool (each diagram entry has an 'id' field).

No output schema declared.

No examples provided.

get_element_by_id ~68

Retrieve a model element by its internal ID. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
idstringyesElement _id as stored in the StarUML repository

No output schema declared.

No examples provided.

get_project_info ~54

Get the current StarUML project's filename and top-level element summary. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

new_project ~57

Create a new empty StarUML project (discards unsaved changes in current project). Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

open_project ~66

Open a StarUML project file (.mdj). Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
filenamestringyesAbsolute path to the .mdj project file

No output schema declared.

No examples provided.

save_project ~82

Save the current StarUML project. If filename is given, saves to that path. Otherwise saves to current path. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
filenamestring–Optional absolute path. If omitted, saves to current project path.

No output schema declared.

No examples provided.

save_project_as ~67

Save the current StarUML project to a new path. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
filenamestringyesAbsolute path for the .mdj file

No output schema declared.

No examples provided.

switch_diagram ~61

Focus (open tab) a diagram by its ID. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
idstringyesDiagram _id

No output schema declared.

No examples provided.

update_element ~85

Set a property on an existing element. Requires staruml-mcp-extension to be installed in StarUML. Install from https://github.com/ezrabrilliant/staruml-mcp-extension

NameTypeReqDescription
fieldstringyesProperty name, e.g. 'name', 'documentation', 'visibility'
idstringyesElement _id
value––New value

No output schema declared.

No examples provided.

Common questions

What is the io.github.ezrabrilliant/staruml-mcp server?

io.github.ezrabrilliant/staruml-mcp is listed in the public MCP registry as io.github.ezrabrilliant/staruml-mcp. MCP server for StarUML, generate UML diagrams from AI agents via stdio or HTTP. This page covers its npm package (staruml-mcp).

Is the io.github.ezrabrilliant/staruml-mcp server safe to use?

io.github.ezrabrilliant/staruml-mcp scores 94 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 21 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the io.github.ezrabrilliant/staruml-mcp server expose?

io.github.ezrabrilliant/staruml-mcp exposes 19 tools: generate_diagram, get_all_diagrams_info, get_current_diagram_info, get_diagram_image_by_id, get_all_commands, and 14 more. Their descriptions and schemas cost roughly 1,501 tokens of context every time the server is loaded.

Is the io.github.ezrabrilliant/staruml-mcp server still maintained?

io.github.ezrabrilliant/staruml-mcp is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

What licence is the io.github.ezrabrilliant/staruml-mcp server under?

io.github.ezrabrilliant/staruml-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.