OpenAI Python SDK v2.34.0+ rejects api_key="" breaking local server integrations (llama.cpp, LM Studio)

What this error means

api_key cannot be empty. Please create one at https://platform.openai.com and try again. is a OpenAI API failure pattern reported for developers trying to developer uses local openai-compatible servers (llama.cpp, lm studio, vllm) with api_key="" and gets credential validation error after upgrading openai-python sdk v2.34.0+; needs workaround or fix to reconnect. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Source: https://github.com/openai/openai-python/pull/3274 (PR fixing issue #3224, created 2026-05-19). Regression introduced in v2.34.0: changed credential check from is None to not self.api_key, breaking all local-compatible-server use cases passing empty string as api_key. HIGH commercial value because affected users pay for OpenAI API but also run local fallbacks; the broken bridge forces costly downtime. Distinct from existing covered errors (standard invalid API key).

Common causes

• Source: https://github.com/openai/openai-python/pull/3274 (PR fixing issue #3224, created 2026-05-19). Regression introduced in v2.34.0: changed credential check from is None to not self.api_key, breaking all local-compatible-server use cases passing empty string as api_key. HIGH commercial value because affected users pay for OpenAI API but also run local fallbacks; the broken bridge forces costly downtime. Distinct from existing covered errors (standard invalid API key).

Quick fixes

1. Confirm the exact error signature matches api_key cannot be empty. Please create one at https://platform.openai.com and try again..
2. Check the OpenAI API account, local tool state, and provider configuration involved in the failing workflow.
3. Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

• Verify the command, editor, extension, or API client that produced the error.
• Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
• Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

1. Capture the exact error message and the command, editor action, or request that triggered it.
2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
3. Review the source evidence below and compare it with your environment.
4. Apply one change at a time and rerun the smallest failing action.
5. Keep the working fix documented for the team or deployment environment.

How to prevent it

• Keep provider/tool configuration documented.
• Record non-secret diagnostics such as tool version, provider name, model name, and command path.
• Add a lightweight check before CI or production workflows depend on the tool.

Sources checked

• https://github.com/openai/openai-python/pull/3274
• https://github.com/openai/openai-python/issues/3224

Evidence note: Source: https://github.com/openai/openai-python/pull/3274 (PR fixing issue #3224, created 2026-05-19). Regression introduced in v2.34.0: changed credential check from is None to not self.api_key, breaking all local-compatible-server use cases passing empty string as api_key. HIGH commercial value because affected users pay for OpenAI API but also run local fallbacks; the broken bridge forces costly downtime. Distinct from existing covered errors (standard invalid API key).

Related errors

• OpenAI API

FAQ

What should I check first?

Start with the exact api_key cannot be empty. Please create one at https://platform.openai.com and try again. text and the smallest action that reproduces it.

Can I ignore this error?

No. Treat it as a failed OpenAI API workflow until the root cause is understood.

Is this guaranteed to have one fix?

No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.

How do I know the fix worked?

Rerun the same command, editor action, or request. The fix is working when that action completes without api_key cannot be empty. Please create one at https://platform.openai.com and try again..