Using the following site to query IP Geolocation with no API key required (https://ip-api.com/).

$IPaddress = read-host "Enter IP address to check Geo-IP information"
$result = Invoke-RestMethod -Method Get -Uri http://ip-api.com/json/$IPaddress
$result  

Create a PScustomObject to contain the Geo-IP information that you want to get.

$myObject = [PSCustomObject]@{
            IP = $result.query
            City = $result.City
            Country = $result.Country
            Region = $result.Region
            ISP = $result.isp
            }

Run a PS code.

$myObject | format-list

We can covert the output to Json.

$myObject | ConvertTo-Json

Create a Get-IPaddress function to query the IP-based Geolocation.

function Get-IPaddress {
    <#
    .SYNOPSIS
        Output the IP-based Geolocation of the given IP address via PowerShell.
    .DESCRIPTION
        This PowerShell script outputs the geographic location of the given IP address.
    .PARAMETER IPAddress
        Specifies the IP address
    .EXAMPLE
        PS> Get-IPaddress 8.8.8.8
    .INPUTS
        String
    .OUTPUTS
        PSCustomObject
    .NOTES
        Author:  Tung
        Date: 2022-11-15
    #>
    [CmdletBinding()]
    Param (
        [Parameter(
            ValueFromPipeline = $true,
            ValueFromPipelineByPropertyName = $true,
            Position = 0)]
     
        [string[]]
        $IPaddress = ""
    )
    BEGIN {}
    PROCESS {
        try {
            if ($IPaddress -eq "" ) {
                $IPaddress = read-host "Enter IP address to check Geo-IP information"
            }
            $API = @{
                Uri    = "http://ip-api.com/json/$IPaddress"
                Method = "Get"
            }
            $result = Invoke-RestMethod @API
            #$result = Invoke-RestMethod -Method Get -Uri http://ip-api.com/json/$IPaddress
            # Create a PSCustomObject to contain Geo-IP information
            $myObject = [PSCustomObject]@{
                IP      = $result.query
                City    = $result.City
                Country = $result.Country
                Region  = $result.Region
                ISP     = $result.isp
            }
        }
        catch {
            #"Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
            $_
        }
        finally {
            $myObject | format-list
            #$myObject | ConvertTo-Json
        }   
    }
}

Get-IPaddress 8.8.8.8 
Get-IPaddress 64.59.144.100