uml-mcp
uml-mcp is an MCP server. Its repository has 107 GitHub stars and is licensed under MIT; we last read it on 2026-10-22.
UML-MCP Server generates UML diagrams based on MCP (Model Context Protocol) through natural language descriptions or direct input of PlantUML, Mermaid, and Kroki code.
Install
MCP servers are packaged differently from each other -- some run via npx, some as a Docker image, some as a plain script you clone and run. uml-mcp’s own README did not state one plainly enough for this page to quote it rather than guess, so it will not guess. The repository below states it.
What it reaches, and what it needs
Maintenance
UML-MCP Server is a UML diagram generation tool based on MCP (Model Context Protocol), which can help users generate various types of UML diagrams through natural language description or directly writing PlantUML and Mermaid and Kroki https://uml-mcp.vercel.app/mcp
What uml-mcp can do
5 tools documented in its README. An AI client calls these by name.
generate_uml- Render one diagram; tool text includes image markdown, **URL**, **Playground**. Use `png` for ImageContent.
generate_uml_image- Inline chat image (default PNG); fetches bytes even under hosted `MCP_URL_ONLY`
validate_uml- Local checks; `strict` for Mermaid/D2 (rejects semicolon-packed `sequenceDiagram`)
list_diagram_types- Catalog (like `uml://types`)
generate_uml_batch- Many diagrams (`MCP_BATCH_MAX_ITEMS`, `MCP_BATCH_CONCURRENCY`)
Read from the README; names are kept only if the README contains them.
Common questions about uml-mcp
- What does uml-mcp do?
- UML-MCP Server generates UML diagrams based on MCP (Model Context Protocol) through natural language descriptions or direct input of PlantUML, Mermaid, and Kroki code.
- How do I install uml-mcp?
- Its README did not state an install command plainly enough for us to quote one, so we do not guess. The repository has the instructions: https://github.com/antoinebou12/uml-mcp
- Is uml-mcp official and is it maintained?
- We found nothing naming it as a vendor’s official server. Its repository has 107 GitHub stars and its state in our directory is listed. Its last commit we recorded was on 2026-10-22.
- What licence does uml-mcp use?
- The repository declares the MIT licence.