Error configuring the Docker MCP Gateway URL in OpenWebUI

[trevorsullivan]

• I’m running OpenWebUI in a Docker container on a headless Linux server.
• I’m running the Docker MCP Gateway container on a different system, as a container.
• In OpenWebUI, I try to configure the URL to the Docker MCP Gateway
• I get an error every time I try to connect

This is the command to run the Docker MCP Gateway container:

docker run -d \
  --publish 8811:8811 \
  --restart=always \
  --name mcp-gateway \
  -v /var/run/docker.sock:/var/run/docker.sock \
  docker/mcp-gateway \
  --transport sse \
  --port 8811

And I can successfully invoke this endpoint from the OpenWebUI server.

> curl http://<ip>:8811/sse
event: endpoint
data: /sse?sessionid=QFX5RTZNC25B2RB23DARCTZ7ML

Question: What is the correct method of specifying the URL for Docker MCP Gateway inside of OpenWebUI?

I have tried tons of different permutations of this URL.