YAMLTools MCP

Work with YAML from your AI editor (Claude Code, Cursor, any MCP client).

Tools

No account needed

• validate_yaml — syntax errors with line/column + lint warnings (tabs, implicit booleans, duplicate keys)
• convert_yaml — between YAML, JSON, XML, TOML, TOON, CSV, TSV, INI, Properties, ENV (auto-detected)
• visualize_yaml — Mermaid source (hosted image with an API key)

With a free API key (manage your saved diagrams)

• list_diagrams, get_diagram, create_diagram, update_diagram

Ask the AI to edit a diagram and watch it update live in the web editor.

Connect

{
  "mcpServers": {
    "yamltools": {
      "type": "http",
      "url": "https://yamltools.dev/api/mcp/mcp"
    }
  }
}

Get a free API key at https://yamltools.dev/dashboard/settings/api-keys — learn more at https://yamltools.dev/mcp