Mcp server not running on n8n

Thank you for your advice. I added that variable in coolify.:

But unfortunately it still doesn’t work:

Can you please explain what you mean with that?:

" In self-hosted setups, MCP support is tied to **agent mode **…" What is the agent mode?

" check that your container is started with: N8N_FEATURE_FLAG_MCP=true"

How can I check that the container ist started with that? Unfortunately I don’t know how to do that.