Update CloudFlare DNS records with PowerShell

Update-CF-DNS.ps1

$CF = @{}
$CF.Endpoint = "https://api.cloudflare.com/client/v4/"
# Replace <API Token> to your CloudFlare API Token
# You can create your API Token from https://dash.cloudflare.com/profile/api-tokens
$CF.APIToken = "Bearer <API Token>"
# Replace <zone id> and <record id>
$CF.UpdateDNSRecord = @{Method = "PUT"; object = "zones/<zone id>/dns_records/<record id>"}

$PublicIP = (Get-NetIPAddress -InterfaceAlias "<Interface Alias>" -AddressFamily IPv4).IPAddress

$target = $CF.UpdateDNSRecord
$Uri = $CF.Endpoint + $target.object
$Headers = @{Authorization = $CF.APIToken}
$content = @{}
$content.type = "A"
$content.name = "<domain name>"
$content.content = $PublicIP
$content.ttl = 120
$content = ConvertTo-Json $content

# You can remomve UseBasicParsing flag if your PowerShell version >= 6.0.0
$response = Invoke-WebRequest -UseBasicParsing -Method $target.Method -Uri $Uri -Headers $Headers -Body $content

$response.Content | ConvertFrom-Json | ConvertTo-Json