> ## Documentation Index > Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt > Use this file to discover all available pages before exploring further. # HttpRequest The `` verb sends a request to the external servers. It consists of 2 child nodes `` and `` ## Attributes

ATTRIBUTE	DESCRIPTION	OPTIONS	DEFAULT
`async`	Defines if TeXML process should wait for the request response. When it is set to false, the callback will be sent to the action URL, when the request is processed		`false`
`action`	Defines the action url that will be used to send the callback when the request is processed (only if async is set to false)		-

## Child verbs/nouns

NOUN/VERB	DESCRIPTION
`Request`	The `` node defines all the attributes of the request. It can have 2 child nodes `` and ``
`Response`	The `` node defines all the attributes of the response. It can have 2 child nodes `` and ``

## Examples ```xml theme={null}

Authorization Bearer API_key

Content-Type application/json

``` ```xml theme={null} ... JSON 200 contact.name.first first_name contact.name.last last_name ``` ## Expected callbacks When the HTTP request completes, a callback is sent to the `action` URL. See [HTTP Request Callback](/api-reference/callbacks/texml-http-request) for the full payload reference.