> For the complete documentation index, see [llms.txt](https://developer.ivvy.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.ivvy.com/getting-started/creating-the-request/request-headers.md).

# Request Headers

Request headers are defined by the header name, followed by a colon (:) followed by a space, followed by the value of the header. A number of headers are used with the iVvy API.