> For the complete documentation index, see [llms.txt](https://faq.droam.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faq.droam.com/menu/webhooks/webhook-payload-types/technical-payloads.md).

# Technical Payloads

These payloads are designed to perform certain system operations, such as endpoint validation, for example. 

**echo** – a payload that is sent to an endpoint for validation. The endpoint must respond with the same payload (Listing 5.1). 

**Listing 5.1 – Example of echo Payload (JSON)**

```
{
     "type":           "echo",
     "data":           {
         "echo_data":      "echo:Ariel:1715854344"
     },
     "created_at":     {...//Date Time Model}
}

```