# diagrams-mcp

> Use this tool when you need to automatically generate UML class diagrams and entity-relationship diagrams from natural language or JSON data. It solves the problem of manual diagram creation, saving time and effort in visualizing code structures and system designs. The tool takes in natural language descriptions or JSON data as input and outputs visual diagrams, making it ideal for use cases where rapid prototyping and design visualization are required.

Canonical page: https://skillsregistry.net/skills/nacho-mazzoni-diagrams-mcp  
JSON: https://api.skillsregistry.net/v1/skills/nacho-mazzoni-diagrams-mcp

## Description

Enables automatic generation of UML class diagrams and entity-relationship diagrams from natural language descriptions or structured JSON data. It integrates with MCP agents to create visual representations of code structures and system designs without manual Mermaid coding.

## Trust

- **Trust score (0–1):** 0.95
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-09-28

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/f0lz8pkafr)
- **Repository:** <https://github.com/nacho-mazzoni/diagrams-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "nacho-mazzoni-diagrams-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/nacho-mazzoni-diagrams-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/nacho-mazzoni-diagrams-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt