Credit Key's documentation lists pre-built integrations for Shopify, BigCommerce, Magento 2, WooCommerce, NetSuite, OpenCart, Miva, PrestaShop, Shift4Shop and Odoo. Its site also names Adobe Commerce, VTEX and CS-Cart. Other stacks connect through the Merchant API, which handles authorization, capture, refunds, webhooks and settlement reconciliation.
Supported platforms
| Platform | Where it is listed |
|---|---|
| Shopify | Docs and Shopify App Store; see Shopify |
| BigCommerce | Docs and BigCommerce app marketplace; see BigCommerce |
| Magento 2 / Adobe Commerce | Docs and Adobe Commerce Marketplace |
| WooCommerce | Docs and the WordPress plugin directory ("Credit Key Payment Gateway") |
| NetSuite, OpenCart, Miva, PrestaShop, Shift4Shop, Odoo | Developer docs |
| VTEX, CS-Cart | Credit Key's e-commerce page |
Two ways buyers enter
- Application flow: launched before checkout from a financing page, navigation, product pages, a CRM or ERP, a sales rep or an email, so buyers arrive with a limit.
- Checkout flow: existing customers authenticate and pay; new ones see the application inside checkout.
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What the Merchant API does
- Authorize and update orders
- Capture payment when you ship
- Issue refunds
- Receive webhook notifications
- Reconcile settlements
- Handle offline orders placed by phone or sales reps
Credit Key also documents a Model Context Protocol (MCP) server so AI coding assistants can generate integration code from its current docs. Older integrations use a hosted checkout API with JavaScript and PHP SDKs.
WooCommerce and Magento notes
The WooCommerce plugin is small by install count, so test it on a staging site and confirm compatibility with your WooCommerce and PHP versions. For Magento 2 or Adobe Commerce, check the extension's supported version range before upgrading your store. In both cases you need Credit Key merchant credentials before going live.
Choosing between plugin and API
| Use the plugin when | Use the API when |
|---|---|
| You run a standard checkout on a listed platform | Your checkout or ERP is custom |
| You want to launch in days | You need financing inside quotes, invoices or a sales tool |
| You have no developers on staff | You need control over order states and reconciliation |
Platform pages: Shopify, BigCommerce, WooCommerce, Magento.
Common questions
Does Credit Key work with Shopify?
Yes. It installs as an additional payment method from the Shopify App Store.
Can I use Credit Key without an e-commerce platform?
Yes, through sales-assisted and offline orders, or a custom build on the Merchant API.
Sources
- Credit Key — Developer docs
- Credit Key — E-commerce solutions
- BigCommerce — Credit Key app listing
- Credit Key — Credit Key for Shopify
Checked November 12, 2026. We link to primary sources so you can verify each figure yourself.