Umlout for ChatGPT

io.github.dmkorj/umlout

Create and edit UML, flowchart, wireframe and sequence diagrams on an Umlout whiteboard.

client:ChatGPT transport:sse

Install Umlout in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://www.umlout.com/mcp/sse

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs