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Status Submitted
Workspace watsonx.ai
Created by Guest
Created on Dec 16, 2025

WatsonX.ai to offer an OpenAI compatible endpoint to inference models

Currently, WatsonX.ai does not provide an OpenAI-compatible endpoint for accessing models hosted on its platform. The OpenAI endpoint standard is widely used and supported by many open-source tools (such as OpenwebUI). In contrast, WatsonX only offers proprietary formats and integrates with frameworks like LangChain or LlamaIndex (IBM documentation). This means its REST API is not compatible with OpenAI endpoints and cannot be used for our intended purposes.

Our requirement:

We need an endpoint using the format “/v1/chat/completions” that can be called with a static API key, enabling us to use WatsonX LLMs within OpenwebUI.

Sample Challenges:

  • WatsonX uses “v1/text/chat?version=2024-10-08”, while OpenAI requires “/v1/chat/completions.” It's not possible to add the string “?version=2024-10-08” because WatsonX appends “/completions” automatically.
  • WatsonX authentication relies on a JWT token that must be refreshed regularly, whereas OpenAI uses a static API key. Therefore, additional logic is needed to fetch and manage the JWT token.
  • The output keys differ: WatsonX uses “model_id,” while OpenAI uses “model.” This requires mapping fields between the two APIs.
  • WatsonX requires setting the project ID with the "-d" option, which also needs special handling and mapping logic to include it in requests.
Needed By Yesterday (Let's go already!)
  • Guest
    Dec 16, 2025

    Potentially the IBM Model Gateway is the answer?!

  • Guest
    Dec 16, 2025

    Absolutely mandatory requirement. Do not understand why this is not available in the first place!