# Mermaid Validator MCP

> Use this tool when you need to validate Mermaid diagram syntax and identify diagram types across various formats. It solves problems related to diagram validation, providing detailed parse-error messages for invalid diagrams without requiring external rendering. Ideal for use cases where accurate syntax checking and diagram type identification are crucial, such as in development, testing, and documentation workflows.

Canonical page: https://skillsregistry.net/skills/lf112-mermaid-validator-mcp  
JSON: https://api.skillsregistry.net/v1/skills/lf112-mermaid-validator-mcp

## Description

An MCP server that validates Mermaid diagram syntax and identifies diagram types across all major formats. It provides detailed parse-error messages for invalid diagrams without requiring external rendering processes.

## Trust

- **Trust score (0–1):** 1.00
- **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/dayp2ef9a8)
- **Repository:** <https://github.com/LF112/mermaid-validator-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": "lf112-mermaid-validator-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/lf112-mermaid-validator-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/lf112-mermaid-validator-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