## 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.

```text
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

You are seeing this: Routing LangChain's AzureChatOpenAI through the Helicone proxy fails with Resource not found from OpenAI. Use this skill when you run into "Langchain + Azure OpenAI proxy getting resource not found error".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## 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`