[Home](./index.md) > [sip.js](./sip.js.md) > [IncomingMessage](./sip.js.incomingmessage.md) > [addHeader](./sip.js.incomingmessage.addheader.md) ## IncomingMessage.addHeader() method Insert a header of the given name and value into the last position of the header array. Signature: ```typescript addHeader(name: string, value: string): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | name | string | header name | | value | string | header value | Returns: `void`