connecting docker n8n and comfyui API

 This is a classic Docker-on-Windows / localhost networking situation.

You have:

• n8n running inside Docker
  → exposed on host port 5679

• ComfyUI running on the host
  → http://127.0.0.1:8000

• You want n8n (inside container) to call ComfyUI using something like http://localhost:8000

That will NOT work by default, because inside Docker:

localhost = the container itself, not your Windows host

---

✅ The Correct & Easiest Solution (Recommended)

Use host.docker.internal

Docker provides a special DNS name that always points to the host machine.

👉 Inside n8n (Docker), use:

http://host.docker.internal:8000

This works on:

• Docker Desktop (Windows ✅)

• Docker Desktop (Mac ✅)

No subnet changes needed.

API URL

http://host.docker.internal:8000

worked