Langchain + Azure OpenAI proxy getting resource not found error

TL;DR

For "Resource not found": maintainer chitalian: with the LangChain Azure wrapper, drop the v1 from the Helicone proxy base URL, i.e. use https://oai.hconeai.com (not https://oai.hconeai.com/v1) as openai\api\base. The maintainer added this to the docs in PR #971.

Resource not found

Steps

1. Maintainer chitalian: with the LangChain Azure wrapper, drop the v1 from the Helicone proxy base URL, i.e. use https://oai.hconeai.com (not https://oai.hconeai.com/v1) as openai_api_base. The maintainer added this to the docs in PR #971.

When to use

Use this skill when you run into "Langchain + Azure OpenAI proxy getting resource not found error".

When not to use

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Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Sources

• https://oai.hconeai.com`
• https://oai.hconeai.com/v1`

In gh:Helicone/helicone#605 (https://github.com/Helicone/helicone/issues/605), the question was: Routing LangChain's AzureChatOpenAI through the Helicone proxy fails with Resource not found from OpenAI. Calling OpenAI directly through the same proxy URL works fine. The verified resolution: Maintainer chitalian: with the LangChain Azure wrapper, drop the v1 from the Helicone proxy base URL, i.e. use https://oai.hconeai.com (not https://oai.hconeai.com/v1) as openai_api_base.