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Hi -- is there a supported way to use a custom URL instead of the Vapi URL in the web SDK?  Perhaps an enterprise feature?  Looking to obfuscate the tech stack we are using

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<@576229976676761630>
Yes, you can use a custom URL by setting the `serverUrl` parameter in your configuration. This will override the default VAPI URL. You can set this at various levels such as function, assistant, phoneNumber, or org, with the precedence order being function.serverUrl > assistant.serverUrl > phoneNumber.serverUrl > org.serverUrl.

Additionally, you can secure your custom server by using the `serverUrlSecret` parameter, which will be sent as a header called `x-vapi-secret` with every request to your server. This adds an extra layer of security to ensure that the requests are coming from your VAPI implementation.

If you need further assistance with setting this up or have any more questions, please let me know!

<@576229976676761630> 

this would hit your API that you proxy to us.

const vapi = new Vapi('your-public-key', https://your-url/voice);

https://github.com/VapiAI/web/blob/cb7f315e49889c84e1b03bfaa1664d14d6b62608/vapi.ts#L114