---
title: "Encoding Macros"
slug: "encoding-macros"
updated: 2023-01-06T15:50:11Z
published: 2023-01-06T15:50:10Z
canonical: "docs.catchpoint.com/encoding-macros"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.catchpoint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Encoding Macros

## Overview

The Encoding macros are primarily used in scripts written for the API monitor, but they can be used with the Transaction monitor as well.

## Example

Some APIs require content to be encoded in various formats.

Currently, Catchpoint supports the following:

`${hex("<content to encode>")}` `${base64("<content to encode>")}` `${urlencode("<content to encode>")}` `${urldecode("<content to decode>")`

Additionally, the macro can be nested as shown below:

`${hex("${hash('md5','${var(key)},${var(secret)}')}")};`