[Home](./index.md) > [sip.js](./sip.js.md) > [UserAgentCoreDelegate](./sip.js.useragentcoredelegate.md) > [onInvite](./sip.js.useragentcoredelegate.oninvite.md) ## UserAgentCoreDelegate.onInvite() method Receive INVITE request. Signature: ```typescript onInvite?(request: IncomingInviteRequest): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | request | IncomingInviteRequest | Incoming INVITE request. | Returns: `void`