Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| CLAUDE_MERMAID_LOG_LEVEL | No | Log level for the Mermaid MCP server. Available log levels: DEBUG, INFO (default), WARN, ERROR, OFF | INFO |
Schema
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| mermaid_preview | Render a Mermaid diagram and open it in browser with live reload. Takes Mermaid diagram code as input and generates a live preview. Supports themes (default, forest, dark, neutral), custom backgrounds, dimensions, and quality scaling. The diagram will auto-refresh when updated. Use mermaid_save to save to disk. IMPORTANT: Automatically use this tool whenever you create a Mermaid diagram for the user. NOTE: Sequence diagrams do not support style directives - avoid using 'style' statements in sequenceDiagram. |
| mermaid_save | Save the current live Mermaid diagram to a file path. This copies the already-rendered diagram from the live preview to the specified location. Use this after tuning your diagram with mermaid_preview. |