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Whalestack – Bitcoin & Stablecoin (USDC, EURC) Payments Plugin for WordPress

Whalestack – Bitcoin & Stablecoin (USDC, EURC) Payments Plugin for WordPress


Add cryptocurreny payment options like Bitcoin, Litecoin, USDC, EURC, and Lightning to your WordPress website using Whalestack (formerly knows as COINQVEST). Settle in fiat or stablecoin with ease. Integrate checkouts supporting Bitcoin, USDC, EURC, and Lightning, directly into your WordPress site. Leverage our unique bank payout feature, ensuring you can effortlessly convert cryptocurrency payments into fiat or stablecoins.

With the WordPress plugin for Bitcoin and stablecoin payments you go global from day one. Enjoy built-in multi-currency support and seamless adaptability to diverse languages, ensuring a globally accessible and user-friendly shopping experience for your customers.

Boost your sales and attract a broader customer base within the thriving demographic of crypto and stablecoin enthusiasts who prefer cutting-edge payment methods.O ptimize conversion rates and enhance customer satisfaction by optimizing conversion rates through the implementation of innovative payment methods tailored to specific buyer preferences.

About Whalestack

Whalestack (formerly knows as COINQVEST) stands as a leader in the digital currency payment sector, offering innovative solutions designed to streamline financial operations for modern businesses. By integrating blockchain technology with traditional banking systems, Whalestack provides a unique blend of services tailored to meet the evolving needs of digitally-focused businesses and entrepreneurs.

Key features

  • Accepts cryptocurrencies (BTC, Lightning, LTC, XLM) and stablecoins (USDC, EURC) on your WordPress website from customers.
  • Instantly settles in your preferred national currency (USD, EUR, BRL) or above cryptocurrencies.
  • Sets the product price in your national currency – 45 fiat currencies are available, see full list here.
  • Doesn’t require any e-commerce setup on your WordPress website.
  • Embeds a payment button in any page, post or widget of your WordPress website.
  • Sets the checkout language in your preferred language.
  • Eliminates chargebacks and gives you control over refunds.
  • Eliminates currency volatility risks due to instant conversions and settlement.
  • Controls tax compliance levels.
  • Automatically generates invoices if tax compliance level is set to compliant.
  • Provides custom payment button text.
  • Provides custom payment button CSS classes available.
  • Translates the plugin into any required language.

Supported Currencies

Argentine Peso (ARS), Australian Dollar (AUD), Bahraini Dinar (BHD), Bangladeshi Taka (BDT), Bermudian Dollar (BMD), Bitcoin (BTC), Brazilian Real (BRL), British Pound (GBP), Canadian Dollar (CAD), Chilean Peso (CLP), Chinese Yuan (CNY), Czech Koruna (CZK), Danish Krone (DKK), Emirati Dirham (AED), Ethereum (ETH), Euro (EUR), Hong Kong Dollar (HKD), Hungarian Forint (HUF), Indian Rupee (INR), Indonesian Rupiah (IDR), Israeli Shekel (ILS), Japanese Yen (JPY), Korean Won (KRW), Kuwaiti Dinar (KWD), Litecoin (LTC), Malaysian Ringgit (MYR), Mexican Peso (MXN), Myanmar Kyat (MMK), New Zealand Dollar (NZD), Nigerian Naira (NGN), Norwegian Krone (NOK), Pakistani Rupee (PKR), Philippine Peso (PHP), Polish Zloty (PLN), Ripple (XRP), Russian Ruble (RUB), Saudi Arabian Riyal (SAR), Singapore Dollar (SGD), South African Rand (ZAR), Sri Lankan Rupee (LKR), Stellar (XLM), Swedish Krona (SEK), Swiss Franc (CHF), Taiwan Dollar (TWD), Thai Baht (THB), Turkish Lira (TRY), Ukrainian Hryvnia (UAH), US Dollar (USD), Venezuelan Bolivar (VEF), Vietnamese Dong (VND)


  • Checkout modal options (minimal and tax compliant)
  • Hosted checkout pages
  • Dashboard with multi-currency blockchain wallets
  • Automated invoice generation for each payment
  • Payouts to bank accounts (SEPA, SWIFT) and crypto wallets



  • A Whalestack merchant account -> Sign up here

Plugin installation

  1. Copy the entire whalestack folder to the /wp-content/plugins/ directory.
  2. Activate the plugin through the Plugins screen (Plugins > Installed Plugins).
  3. Find the Whalestack menu in your WordPress admin screen.

Plugin configuration

  1. Get your API key and secret from your Whalestack merchant account.
  2. Enter API key and secret into the Whalestack plugin settings page.
  3. Create a new payment button and copy the generated shortcode into your page, post or widget.
  4. Manage all payments in your merchant account. You will be notified by email about every new payment.


Do you have questions or issues with Whalestack? Feel free to contact us anytime!


Disyembre 13, 2021
I have been looking for a solution for my store for a long time so that customers can pay for goods with cryptocurrency. I am very happy with this plugin because it has everything I need. Store-free and easy integration. Thanks a lot!
Hunyo 15, 2020
Highly recommend this plugin as it allows you to accept various forms of cryptocurrency payments for products and services sold on your website (Stellar lumens (XLM), Bitcoin (BTC), Litecoin (LTC), Ether (ETH), and Ripple (XRP)). Works well for donations too. In addition, it lets you select the currency you want delivered, be it a cryptocurrency or a fiat currency like Brazilian Real, Canadian Dollars, Euro, Naira, or US Dollars. Your customers can select the method of value they want to use to pay and you get to pick the method of value you want. It converts it all behind the scenes at the current market value of the currency used to pay and the currency you receive. They also provide invoicing and tracking because it plugs into their much larger API.
Read all 2 reviews

Contributors & Developers

“Whalestack – Bitcoin & Stablecoin (USDC, EURC) Payments Plugin for WordPress” is open source software. The following people have contributed to this plugin.




  • Finetuning for Whalestack


  • Fixed PHP 8 deprecated messages


  • Rebranding from COINQVEST to Whalestack


  • Updated settlement currency to reflect new API response from /asset endpoint (asset.id)


  • Minor text updates


  • Adoption of new checkout parameter naming


  • Minor code changes


  • Reduced number of API calls
  • CSS height fix for modal overlay
  • Tested for WordPress version 6.0


  • Added ‘ORIGIN’ as settlement currency option
  • Text changes
  • Tested for WordPress version 5.9
  • Minor fixes


  • Added checkout support for 50 currencies (45 fiat currencies and 5 cryptocurrencies), see full list here
  • Cleaned up code


  • Added cryptocurrencies as settlement currencies
  • Added language selector for checkout page


  • Tested for WordPress version 5.5


  • Added Brazilian Real (BRL) as settlement currency
  • Removed trailing zeros when displaying digital currencies
  • Added CSS style height: 100% for modal input fields


  • Fixed version number
  • Code cleanup


  • Fixed incompatibility with Bootstrap modal
  • Added plugin settings link


  • Field mobile_number changed to phone_number