Create Architecture Diagrams
Generate system architecture diagrams showing components, services, databases, and their connections.
Diagram Generator
Render Mermaid, PlantUML & more
Render diagrams from text source code in Mermaid, PlantUML, Graphviz DOT, D2, C4-PlantUML, ERD, DBML, and more. Returns SVG or PNG plus a permanent URL for embedding. Great for architecture, flowcharts, and sequence diagrams.
Generate Diagram
Render a diagram from text source code. Accepts Mermaid, PlantUML, Graphviz DOT, D2, C4-PlantUML, ERD, DBML, and more. Returns a rendered image file plus a permanent URL for embedding.
Returns: Rendered diagram image as a downloadable file plus a permanent URL for embedding
Parameters
source *stringThe diagram source text in the specified diagram language
typestringDiagram language (default "mermaid"). Supported: mermaid, plantuml, graphviz (DOT), d2, c4plantuml, erd, dbml, blockdiag, seqdiag, actdiag.
formatstringOutput image format (default "svg"). SVG is scalable and includes the raw markup; PNG is a raster image.
Example
Mermaid flowchart showing a CI/CD pipeline
curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
-d '{
"tool": "diagram-generator",
"skill": "generate_diagram",
"input": {
"source": "graph TD\n A[Push Code] --> B[Run Tests]\n B --> C{Tests Pass?}\n C -->|Yes| D[Deploy to Staging]\n C -->|No| E[Fix & Retry]\n D --> F[Deploy to Production]",
"type": "mermaid"
}
}' \
https://api.toolrouter.com/v1/tools/callQuick Start
MCP (Claude Code)
claude mcp add --transport stdio \
--env TOOLROUTER_API_KEY=YOUR_API_KEY \
toolrouter -- npx -y toolrouter-mcpREST API
curl -H "Authorization: Bearer $TOOLROUTER_API_KEY" \
-d '{"tool":"diagram-generator","skill":"generate_diagram","input":{}}' \
https://api.toolrouter.com/v1/tools/callUse Cases
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Frequently Asked Questions
What kinds of diagrams can I generate?
`generate_diagram` supports Mermaid, PlantUML, Graphviz DOT, D2, C4-PlantUML, ERD, DBML, and similar text-based diagram formats.
Do I get an image file or just text output?
You get a rendered SVG or PNG plus a permanent shareable URL, so the diagram can be embedded or downloaded after it is generated.
What should I pass for the diagram type?
Pass the source code and the format type, and use `mermaid` if you want the default. SVG is the default output format for scalable diagrams.
Is this good for architecture and flowcharts?
Yes. It is built for architecture diagrams, flowcharts, sequence diagrams, and other structured visuals where text source is easier to version than pixels.