# Postman

###### tags: `Postman`

https://www.postman.com/

## Variable

#### set variable
- name
- value
- scope: global / collection

#### change variable
collection > variable
- `INITIAL VALUE`: will shared with someone else
- `CURRENT VALUE`: private to you (e.g. password)

## Query Parameters(optional)
`{{url}}/books?KEY1=VALUE1&KEY2=VALUE2`
- Additional data we can submit to the API
- Depending on the API, some are mandatory and some are optional
- `?` - to start params
- `&` - to connect multiple params

### key-value pair
- `KEY`
- `VALUE`

### Path Variables
`{{url}}/books/:bookId`
- no `?`
- the `VALUE` won't be send
- `:KEY` will be replaced in the URL with `VALUE` instead

### create random test data
Type in `{{$` and it will show the options

### global variables
(Environment) > Globals > Add/Edit
- change the value and it will apply to everywhere using this variable

`{{variable}}`

## Authentication(WIP)