Fixing LibreChat OpenRouter Web Search Error | Generated by AI
The error “404 No endpoints found that support tool use” when using the web search function in LibreChat with OpenRouter is a known issue. Here’s what’s happening and how to fix it:
Why This Happens
- Not all models on OpenRouter support “tool use” (like web search, function calling, etc.)—only a subset do. If you select a model that doesn’t support tools, you’ll get this 404 error.
- OpenRouter requires you to explicitly choose a model that supports tool/function calling for features like web search to work.
- LibreChat’s configuration may also override endpoints if not set up correctly, leading to routing issues.
How to Fix It
1. Select a Model That Supports Tools
- Go to OpenRouter’s model list and filter by “tools” in the sidebar. Only models with tool support will work with LibreChat’s web search function.
- Recommended models: Look for those labeled as supporting “function calling” or “tools” (e.g., some versions of GPT-4, Claude, or other advanced models).
2. Update LibreChat Configuration
- Do not use
OPENROUTER_API_KEYin your LibreChat config, as it may override the OpenAI endpoint and cause conflicts. - In
librechat.yaml, ensure your OpenRouter endpoint is correctly configured and not blocked by “Ignored Providers” or restricted by “Allowed Providers”.
3. Clear Provider Restrictions
- In OpenRouter settings, unblock all “Ignored Providers” and clear “Allowed Providers” to ensure LibreChat can access all available endpoints.
4. Restart LibreChat
- After making these changes, restart LibreChat to apply the new settings.
Still Not Working?
- Check the LibreChat docs on custom endpoints for advanced setup.
- If the issue persists, try switching to the official OpenAI API (if you have access) or another provider that supports tool use