n8n

In n8n, the safest route is the HTTP Request node.

That keeps the host, headers, and body completely explicit. Use the built-in OpenAI node only if your n8n build lets you override the base URL cleanly.

HTTP Request node

Body JSON

{
  "model": "gpt-5.3",
  "messages": [
    {
      "role": "user",
      "content": "Say n8n-ok"
    }
  ]
}

Method: POST
URL: https://base.cheap-api.shop/v1/chat/completions
Auth: Bearer token
Token: your CheapAI key

Why this path

This path is explicit and reliable. You always know which URL, headers, and payload n8n is sending.

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