Feature Request: Allow setting custom base URL in OpenAI node (e.g. Novita AI support)

[MrHadik]

Description:

Hi n8n team 👋,

I'm integrating Novita AI, which is OpenAI-compatible but uses a different base URL: https://api.novita.ai/v3/openai

Currently, the OpenAI node in n8n does not allow modifying the base URL. This limits the ability to connect to third-party OpenAI-compatible APIs like Novita AI, OpenRouter, Anyscale, or Azure OpenAI.

---

Current Behavior:

• The OpenAI node uses the default base URL https://api.openai.com.
• There's no field or setting to override this URL.
• This prevents the use of alternative providers with the same API structure.

---

Expected Behavior:

• Add a Base URL field in the OpenAI credentials UI.
• If provided, use the custom base URL instead of the default.
• Fallback to https://api.openai.com if the field is empty (to preserve current behavior).

---

Use Case Example:

Trying to connect to: https://api.novita.ai/v3/openai

This API supports the same request/response structure as OpenAI, so no other changes are needed.

---

Proposed Change:

• Update OpenAI.credentials.ts to include an optional baseUrl field.
• Modify OpenAI.node.ts to use this field when making API requests.

---

Thanks for the amazing work on n8n! This feature would be a huge help for all of us exploring OpenAI-compatible models 🙏

[Joffcom]

Hey @MrHadik,

This is already possible...

I am going to mark this as closed for now, For future reference feature requests are best created on our support forum as we use GitHub issues only for issues.

[dxcore35]

What API key to add if there is no API key of my OPENAI compatible api server! But it is marked as mandatory

[hastmu]

Hi, i tired to used novita ai llm for n8n, which did not work out of the box, so i headed for an api-mediation, which is at time of writting working for the AI-agent node.
if it helps see: https://github.com/hastmu/n8n_openai-api_2_novita.ai-api_proxy
enjoy.

[SajadTroy]

you can simply use "https://api.novita.ai/v3/openai" as base url.