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DiagramForge Render
x402
DiagramForge Render is a paid API for AI agents from diagramforge.slatespark.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-13).
Renders text-based diagram source code (Mermaid, PlantUML, Graphviz, D2, and 20+ other languages) into SVG or PNG images via a pay-per-use API.
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-render diagram API for AI agents. Renders Mermaid, PlantUML, Graphviz, D2 and 20+ other text-to-diagram languages to SVG/PNG images. x402 payments (USDC on Base), no accounts or API keys.
Output
Returns an SVG or PNG image (as a string) of the rendered diagram. The output format depends on the requested format field (svg by default, or png/jpeg for graphviz).
Example use cases
Generate visual flowcharts from process descriptions
“I've written out a workflow process in Mermaid syntax. Can you convert it to an SVG image so I can share it with the team? The diagram shows our customer onboarding steps from signup through activation.”
Create architecture diagrams for documentation
“I need to visualize our system architecture using PlantUML. Can you render this component diagram as a PNG? It shows how our microservices connect to each other and to the database layer.”
Transform state machines into shareable images
“I've got a Graphviz state diagram that describes our order fulfillment pipeline. Can you turn this DOT code into a PNG image I can embed in our technical documentation?”
Technical details
Endpoint
POSThttps://diagramforge.slatespark.workers.dev/render?utm_source=zero.xyzWhen to prefer
Use DiagramForge when you need to convert text-based diagram code (Mermaid, PlantUML, Graphviz, D2, etc.) into a visual image (SVG or PNG) without needing an account or API key. Ideal for AI agents that generate diagram source code and need to produce shareable image output on-demand, paying per render with USDC on Base via x402.
Side effects
- Invalid or unsupported diagram language type returns an error
- Malformed diagram source code causes a rendering parse error
- Unsupported output format for a given diagram language (e.g. jpeg only for graphviz)
- Payment failure or insufficient USDC balance blocks the request
- Missing required fields (type or source) returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| typerequired | string | Diagram language |
| format | string | Output format: svg (default) or png (jpeg for graphviz) |
| sourcerequired | string | Diagram source code, e.g. 'graph TD; A-->B;' for mermaid |
Output
Schema · Response
{
"type": "string"
}Tags
x402
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