Troubleshooting
Common issues and solutions for MCP Gateway connections.
Connection Issues
Connection Failed
- Verify server URL is correct (including
https://) - Check authentication credentials are valid and not expired
- Enable popups for Vendia’s domain in browser settings
- Ensure the MCP server is online (check service status page)
- Test URL accessibility with curl or browser
Server Not Listed After Connection
- Refresh the MCP Gateway page
- Check browser console for JavaScript errors
- Clear browser cache and try again
- Verify you’re in the correct workspace
Authentication Issues
OAuth Authorization Failed
- Enable popups for
vendia.comin browser settings - Grant all requested permissions during authorization
- If using app credentials, verify client ID and secret are correct
- Check external service status page for outages
- Try a different browser if issues persist
API Key Authentication Not Working
- Verify API key is correct and hasn’t expired
- Check header names are exact (case-sensitive:
Authorization,X-API-Key) - Ensure header format matches service requirements (e.g.,
Bearer token) - Test API key directly with curl or Postman outside Vendia
- Verify API key has necessary permissions for requested operations
Server Access Issues
Tools Not Appearing in AI Application
- Disconnect and reconnect your AI application to Vendia MCP Server
- Wait a few minutes for tool discovery to complete
- Verify connection shows as active in MCP Gateway
- Check AI application’s MCP settings and enabled servers
- Try disconnecting and reconnecting the server in MCP Gateway
Queries Fail or Timeout
- Check external service status page for outages
- Verify query syntax matches service documentation
- Check for rate limits or quota exceeded errors
- Test with simpler queries to isolate issues
- Verify OAuth/API key permissions include requested data access
Custom Server Issues
Can’t Connect to Custom MCP Server
- Verify URL follows MCP specification format
- Ensure protocol is
https://(nothttp://) - Check server is publicly accessible via HTTPS
- Test server with MCP client tool first
- Verify SSL certificate is valid
- Check authentication method matches server requirements
Getting Help
For additional support:
- Review Connecting External MCP Servers
- Check Authentication Methods
- See Use Cases for example queries
- Contact support: Free Tier via contact form, Enterprise at support@vendia.com