PHP
7.4+A Composer package for your PHP backend, with invoice helpers and payment notification verification.
composer require whollycrypto/php-sdkOFFICIAL SDKS
Your app. Your crypto checkout.
Create invoices, check payments and verify signed notifications with a few calls to your own Wholly Crypto installation.
SDK 2.4.0 supports merchant 5.5.0. Choose accepted tokens with chain_slug and asset_tickers. Clear receiving diagnostics help explain missing scanner providers, wallet setup or rates. Inactive choices are ignored; no matches means store defaults. Invoice API →
Python
3.10+A lightweight client for Python backends and scripts. No extra runtime dependencies.
python -m pip install whollycryptoJavaScript / TypeScript
Node.js 22+One npm package with built-in types, ES modules and CommonJS support. Made for your server, not the browser.
npm install whollycryptoConnect to your server.
Use your installation’s API URL and a project-restricted API credential. Find the Project and Store API IDs under Store → Basic → API IDs. Keep credentials and signing secrets on your backend.
All three SDKs are MIT licensed. Browse the merchant API → or use a ready-made WooCommerce or WHMCS plugin →.