Redwan Shaikh
04/07/2025, 12:18 PMVapi Support Bot
04/07/2025, 12:20 PMhttps://
and not include "https" twice)
## Troubleshoot CORS Restrictions
The error mentions CORS restrictions as a possible cause:
- If you're using a custom server, you may need to configure CORS headers at the server level
- According to [VAPI documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1342210515883261952), custom headers need to be configured at the server level, not directly in the tool configuration
## Check If Your Server Is Down
To verify if your server is running properly:
- Check your server logs for errors or intermittent downtime
- Try to manually access your webhook endpoint using tools like Postman or cURL
- Ensure your local server is running on the expected port
## Network Connectivity Troubleshooting
For general network connectivity issues:
- Verify that your network allows outgoing connections to api.vapi.ai
- Check if there are any firewalls blocking the connection
- Ensure you have a stable internet connection
- Try connecting from a different network to rule out local network issues
## Additional Steps
- Simplify your webhook configuration to test basic connectivity
- Check that your endpoint is a POST
endpoint, as [VAPI requires](https://docs.vapi.ai/server-url/developing-locally)Vapi Support Bot
04/07/2025, 12:20 PMngrok http {your_port}
Would you be able to share more details about your specific setup so I can provide more targeted assistance?
Sources:
- [VAPI Webhook Configuration](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1335932034518089741)
- [CORS Restrictions Troubleshooting](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1342210515883261952)
- [Server Status Checking](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334280135683084328)
- [Network Connectivity Issues](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334889631333875793)
- [VAPI Local Development](https://docs.vapi.ai/server-url/developing-locally)Praveen Nair
04/07/2025, 10:27 PM