Update a Dynamic DNS Record in Namecheap using PowerShell

Set-NamecheapDdnsRecord.ps1

function Set-NamecheapDdnsRecord {
    <#
    .SYNOPSIS
        Update the IP address of a Dynamic DNS record in Namecheap.
    .EXAMPLE
        PS C:\> Set-NamecheapDdnsRecord -HostRecord www -Domain brianmorrison.me -ApiKey 12345678abcd -Ip 123.234.123.234
        Updates the record for www.brianmorrison.me to 123.234.123.234
    .NOTES
        Author: Brian Morrison II
        Date: 4/10/2019
        Website: https://brianmorrison.me
    #>

    param(
        # Host record that will be updated
        [Parameter(Mandatory=$true)]
        [String]
        $HostRecord,
        # Domain name in Namecheap
        [Parameter(Mandatory=$true)]
        [String]
        $Domain,
        # API Key obtained from the Advanced DNS tab of the domain.
        [Parameter(Mandatory=$true)]
        [String]
        $ApiKey,
        # IP that the record will be pointed to. Defaults to the public IP of where function was executed.
        [Parameter()]
        [String]
        $Ip
    )

    if($null -eq $Ip) {
        $ipifyResponse = Invoke-WebRequest -Method Get -Uri "https://api.ipify.org"
        $Ip = $ipifyResponse.content
    }

    $namecheapRequestUri = "https://dynamicdns.park-your-domain.com/update?host=$HostRecord&domain=$Domain&password=$ApiKey&ip=$Ip"

    Invoke-WebRequest -Method Get -Uri $namecheapRequestUri
}