OpenRouter / LiteLLM
OpenRouter OAuth flows missing error_description and hint fields
Developers integrating OpenRouter OAuth (model provider auth via OpenRouter) get opaque errors without description or hint fields, making it impossible to programmatically handle auth failures. Includes evidence for OpenRouter troubleshooting demand.
- Category
- LiteLLM
- Error signature
OAuth authorization code flow and device/auth requests fail without standard OAuth error_description/hint error fields, leaving clients unable to parse failure reasons- Quick fix
- Verify the account session, API key, provider settings, and environment where the failing tool is running.
- Updated
What this error means
OAuth authorization code flow and device/auth requests fail without standard OAuth error_description/hint error fields, leaving clients unable to parse failure reasons is a OpenRouter failure pattern reported for developers trying to developers integrating openrouter oauth (model provider auth via openrouter) get opaque errors without description or hint fields, making it impossible to programmatically handle auth failures.. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.
Why this happens
Pull request #28471 in BerriAI/litellm repo (open, created 2026-05-21). Adds error_description and hint for OAuth flows — indicates these were missing before. OpenRouter used as model proxy/billing layer → LiteLLM category (proxy-specific behavior per mapping rules). Directly affects production integrations with model providers through OpenRouter.
Common causes
- Pull request #28471 in BerriAI/litellm repo (open, created 2026-05-21). Adds error_description and hint for OAuth flows — indicates these were missing before. OpenRouter used as model proxy/billing layer → LiteLLM category (proxy-specific behavior per mapping rules). Directly affects production integrations with model providers through OpenRouter.
Quick fixes
- Confirm the exact error signature matches
OAuth authorization code flow and device/auth requests fail without standard OAuth error_description/hint error fields, leaving clients unable to parse failure reasons. - Check the OpenRouter account, local tool state, and provider configuration involved in the failing workflow.
- Verify the account session, API key, provider settings, and environment where the failing tool is running.
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
- Capture the exact error message and the command, editor action, or request that triggered it.
- Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
- Review the source evidence below and compare it with your environment.
- Apply one change at a time and rerun the smallest failing action.
- 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
Evidence note: Pull request #28471 in BerriAI/litellm repo (open, created 2026-05-21). Adds error_description and hint for OAuth flows — indicates these were missing before. OpenRouter used as model proxy/billing layer → LiteLLM category (proxy-specific behavior per mapping rules). Directly affects production integrations with model providers through OpenRouter.
Related errors
- LiteLLM
FAQ
What should I check first?
Start with the exact OAuth authorization code flow and device/auth requests fail without standard OAuth error_description/hint error fields, leaving clients unable to parse failure reasons text and the smallest action that reproduces it.
Can I ignore this error?
No. Treat it as a failed OpenRouter 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 OAuth authorization code flow and device/auth requests fail without standard OAuth error_description/hint error fields, leaving clients unable to parse failure reasons.