> For the complete documentation index, see [llms.txt](https://neomatrixcode.gitbook.io/merly/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://neomatrixcode.gitbook.io/merly/guide/headers.md).

# Headers

The headers are returned on each endpoint within each HTTP structure.

```julia
HTTP.Response(200
          , HTTP.mkheaders(["Content-Type" => "text/plain"])
          , body="I did something!")
```

However, if you need to always return a certain or certain headers in each route, to avoid unnecessary code repetition you can use the headersalways function, in the same way there is a method that allows you to configure CORS.

## headersalways

It is a method that allows you to establish a headre or set of headers that will be returned as soon as a request is made to any endpoint. The headers will be placed in a row of tuples, these can be one or more headers.

```julia
headersalways(["X-PINGOTHER" => "pingpong", "Y-PINGOTHER" => "text"])
```