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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.com in 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:// (not http://)
  • 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: