PowerShell is fun :)Retrieve Coinmarketcap information using PowerShell

If you’re into Crypto and would like to see the latest price of your precious coin, then perhaps this is a blog post for you 😉 In this blog post, I will show you how you can use the API from Coinmarketcap to show you the latest stats in every newly started PowerShell session.

Table Of Contents

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Preparation
How the script works
The script

Preparation

To use the Coinmarketcap API service, you must first register a free account. You can do this by following these steps:

Go to https://www.coinmarketcap.com and select Sign up in the top right corner
After registering, go to https://pro.coinmarketcap.com/account
Click on COPY KEY when hovering your mouse cursor over the API Key and save it somewhere. You will need to add it to the script.

Note: The free account has a limit of 333 searches each day, 10.000 each month, and 30 requests per minute

How the script works

You can start the Get-CoinMarketCap.ps1 script from your saved location to import the function in your session by running:

. c:\scripts\Get-CoinMarketCap.ps1

The function is now available for you in the current session. Please save it to your profile, so it automatically starts every time you start a new session. You can follow these steps for that:

- notepad $profile
- Add ". c:\scripts\Get-CoinMarketCap.ps1" at the end of your profile
- Add Get-CoinMarketCap below that (Or Get-CoinMarketCap -Search BTC for example to only display BTC (BitCoin) stats)
- Save and quit
- Start a new PowerShell session

By default, the Get-CoinMarketCap function will only return the top 10. The output looks like this:

When using the -Search parameter, it will look like this when searching for BTC:

Note: The -search parameter will only search in the Top 100 items

The script

Below is the script for the Get-CoinMarketCap function, replace xxxxxxxx with your own API key which you received after registering your API account:

function Get-CoinMarketCap {
    param (
        [Parameter(Mandatory = $false, HelpMessage = "Enter the coin that you want to search for, i.e. BTC")][string]$Search
    )

    #Set values for API call
    $params = @{
        uri     = 'https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest'
        Method  = 'Get'
        Headers = @{
            "Content-Type"      = 'Accept: application/json'
            "X-CMC_PRO_API_KEY" = ' xxxxxxxx'
        }
    }

    #retrieve data
    $data = Invoke-RestMethod @params
    if ($null -eq $Search) {
        $coins = $data.data | Sort-Object cmc_rank | Select-Object -First 10
    }
    else {
        $coins = $data.data | Where-Object Symbol -EQ $Search
        if ($null -eq $coins) {
            Write-Warning ("Specified {0} coin was not found, exiting..." -f $Search)
            return
        }
    }

    $total = foreach ($coin in $coins) {
        [PSCustomObject]@{
            "Rank"               = $coin.cmc_rank
            "Name"               = $coin.Name
            "Symbol"             = $coin.Symbol
            "Price in USD"       = $coin.quote.usd.Price
            "1 hour difference"  = "$($coin.quote.usd.percent_change_1h)%"
            "24 hour difference" = "$($coin.quote.usd.percent_change_24h)%"
            "7 day difference"   = "$($coin.quote.usd.percent_change_7d)%"
        }
    }
    return $total | Format-Table -AutoSize
}

Download the script(s) from GitHub here