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Plugin Development Guide

Getting started

A httpYac plugin is an npm package that can add additional features to the project using httpYac. These features can include:

  • provide additional environments
  • remove sensitive information from logging
  • provide additional variable substitution
  • add new parser logic and actions

As an npm package, CLI plugin must have a package.json file. It's also recommended to have a plugin description in to help others find your plugin on npm.

So, typical CLI plugin folder structure looks like the following:

├── index.js      # service plugin
├── package.json

Naming and Discoverability

For a plugin to be usable in a httpYac project, it must follow the name convention httpyac-plugin-<name> or @scope/httpyac-plugin-<name>. It allows your plugin to be:

  • Discoverable by httpYac;
  • Discoverable by other developers via searching;


Make sure to name the plugin correctly, otherwise it will be impossible to find it with httpYac plugins search!

For better discoverability when a user searches for your plugin, put keywords describing your plugin in the description field of the plugin package.json file.


  "name": "httpyac-plugin-keystore",
  "version": "0.7.7",
  "description": "httpyac plugin to add keystore support to variables"


A custom global plugin can also be set using env Variable HTTPYAC_PLUGIN

Service Plugin

Service plugin serves for extending hooks on every httpyac execution.

Service plugins are loaded automatically when a Service instance is created - i.e. every time the httpyac command is invoked inside a project. It's located in the index.js file in httpyac plugin root folder.

A service plugin should export a function which receives one arguments:

The minimal required code in the service plugin file is the following:

module.exports = () => {}

Parsing FlowChart

parse flow

Sending FlowChart

send flow

Execute Http Region FlowChart

execute flow