Title: Checkout.com Payment Gateway Author: checkoutintegration Published: December 9, 2019 Last modified: April 22, 2026 --- Search plugins ![](https://ps.w.org/checkout-com-unified-payments-api/assets/banner-772x250.png? rev=3423700) ![](https://ps.w.org/checkout-com-unified-payments-api/assets/icon.svg?rev=3423692) # Checkout.com Payment Gateway By [checkoutintegration](https://profiles.wordpress.org/checkoutintegration/) [Download](https://downloads.wordpress.org/plugin/checkout-com-unified-payments-api.5.1.2.zip) * [Details](https://wordpress.org/plugins/checkout-com-unified-payments-api/#description) * [Reviews](https://wordpress.org/plugins/checkout-com-unified-payments-api/#reviews) * [Installation](https://wordpress.org/plugins/checkout-com-unified-payments-api/#installation) * [Development](https://wordpress.org/plugins/checkout-com-unified-payments-api/#developers) [Support](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/) ## Description **Fast Checkout with Checkout.com FLOW** – Deliver lightning-fast checkout experiences with Checkout.com FLOW, our modern payment solution that reduces friction and increases conversions. Checkout.com helps your business offer more payment methods and currencies to more customers. We combine gateway, international acquiring, and payment processing services, all through one integration with WooCommerce. The Checkout.com plugin for WooCommerce allows shop owners to process online payments through the Checkout.com Payment Gateway. This plugin offers multiple payment modes including FLOW for fast checkout and is maintained by Checkout.com. #### Card Payments with FLOW **Checkout.com FLOW** provides fast, secure checkout with an embedded payment form. Shoppers complete payments without leaving your website. The FLOW payment form is cross-browser and cross-device compatible, accepting payments from all major credit cards. FLOW features include: * **Fast Checkout** – Streamlined payment flow that reduces cart abandonment * **Saved Cards** – Securely save payment methods for instant future checkouts * **3D Secure** – Built-in 3DS authentication for enhanced security * **Real-time Validation** – Instant card validation before order submission * **Modern UI** – Responsive payment forms for all devices #### Alternative Payments Users can place orders with alternative and local payment options: Alipay (China& Hong Kong), Alma, Bancontact, Benefit, Dana, EPS, GCash, Ideal, Kakaopay, Klarna, KNet, MBWay, Multibanco, P24 (Przelewy24), QPay, SEPA (WooCommerce subscription compatible), STCPay, Tabby, Tamara, TNG, TrueMoney. #### Digital Wallets * **Google Pay** – Fast, secure checkout with one tap * **Apple Pay** – One-tap checkout on Apple devices * **PayPal** – Standard and Express checkout support #### Express Checkout Users can place orders with PayPal, Google Pay, and Apple Pay Express checkout on product pages, shop pages, and cart pages without going through the full checkout process. Express checkout options appear in a unified container when enabled. #### Additional Features * **MOTO Payments** – Process Mail Order/Telephone Order payments * **Recurring Payments** – Full support for subscriptions with SEPA Direct Debit compatibility * **Saved Cards** – With FLOW integration, saved cards enable instant checkout for faster payments * **WooCommerce Invoicing** – Send invoice emails to customers for payment #### Features * **FLOW Integration** – Fast, secure checkout with Checkout.com FLOW * Credit Cards, Google Pay, Apple Pay, PayPal * 150+ currencies, 60+ countries supported * WooCommerce Subscriptions compatible * Webhook processing with queue system * Automatic order status updates Contact us at: partnerships@checkout.com #### Contributors & Developers “Checkout.com Payment Gateway” is open source software. The following people have contributed to this plugin. ## Screenshots * [[ * Installation * [[ * Configuration * [[ * Checkout * [[ * Webhook ## Installation **From merchant’s WordPress admin** 1. Go to plugin section-> Add new 2. Search for “Checkout.com Payment Gateway” 3. Click on Install Now 4. Click on Activate 5. Click on Settings to configure the module 6. Configure the webhook url in your checkout hub account. **Webhook URL:** http://example.com/?wc-api=wc_checkoutcom_webhook After the plugin has been configured, customers will be able to choose Checkout. com as a valid payment method. ## FAQ ### What fees are associated with the gateway? Checkout.com uses Interchange++ which offers more transparency than other pricing models. With Checkout.com there are no minimums, no contracts required and pricing is based on your transaction volume and history. Other payment processors charge a blended rate. We use the Interchange++ model, a payment processing fee structure that standardizes the commissions collected by card issuers such as Visa and Mastercard. The amount varies based on card type, the customer’s issuing bank, merchant location, and other parameters. Using Interchange++, we pass the fees charged by card brands directly through to you. Checkout.com charges a single, consistent mark-up that never changes, so you’ll have full transparency of your costs and know exactly what you’re paying. There are also no hidden fees, no setup fees and no account maintenance fees. Additionally, you’ll also get: * Dedicated account management and service * Risk and fraud management tools * Integration with all major shopping carts To learn more about our pricing, visit https://www.checkout.com/pricing ### What currencies and countries does the payment gateway support? **Countries** – the following are supported in the integration: * Argentina * Australia* Austria * Bahrain * Belgium * Brazil * Bulgaria * Canada * Chile * Colombia * Croatia* Cyprus * Czech Republic * Denmark * Ecuador * Egypt * Estonia * Finland * France* Germany * Gibraltar * Greece * Guernsey * Hong Kong * Hungary * Iceland * Ireland* Isle of Man * Italy * Japan * Jersey * Jordan * Kuwait * Latvia * Liechtenstein * Lithuania * Luxembourg * Malta * Mexico * Netherlands * New Zealand * Norway * Oman* Pakistan * Peru * Philippines * Poland * Portugal * Qatar * Romania * Saudi Arabia* Singapore * Slovakia * Slovenia * Spain * Sweden * Switzerland * Thailand * UAE * United Kingdom * United States * Uruguay **Currencies** – [150+ transaction currencies](https://docs.checkout.com/resources/codes/currency-codes) are supported in the integration ### Does SEPA support recurring payments like for subscription? Yes ### How do I contact the Payment Provider’s Support? support@checkout.com ## Reviews ![](https://secure.gravatar.com/avatar/d76b6a33366fb660d2407a06051ab2f57d49722c7e792a2ced70ee4e2df20595? s=60&d=retro&r=g) ### 󠀁[thanks for plugin](https://wordpress.org/support/topic/thanks-for-plugin-27/)󠁿 [ttodua](https://profiles.wordpress.org/ttodua/) January 11, 2025 thanks for plugin ![](https://secure.gravatar.com/avatar/58312aeca298f3a56117c1cda646749b093c350adb3a7c2f454fba52164f90e9? s=60&d=retro&r=g) ### 󠀁[Is is updated to newer checkout version?](https://wordpress.org/support/topic/is-is-updated-to-newer-checkout-version/)󠁿 [muneebarif1190](https://profiles.wordpress.org/muneebarif1190/) June 19, 2020 1 reply Checkout.com updated php sdk couple of months ago, is plugin updated to that? ![](https://secure.gravatar.com/avatar/fa74213080dfb881efb597412f82d9187b209078de06e9531e80161390c51aa7? s=60&d=retro&r=g) ### 󠀁[Very nice plugin – could use better code quality](https://wordpress.org/support/topic/very-nice-plugin-could-use-better-code-quality/)󠁿 [Updula](https://profiles.wordpress.org/updula/) May 29, 2020 Plugin is very nice bridge between WC and checkout.com – the plugin code isn’t using best practices of WC, but hopefully they will keep improving this. [ Read all 3 reviews ](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/reviews/) ## Contributors & Developers “Checkout.com Payment Gateway” is open source software. The following people have contributed to this plugin. Contributors * [ checkoutintegration ](https://profiles.wordpress.org/checkoutintegration/) [Translate “Checkout.com Payment Gateway” into your language.](https://translate.wordpress.org/projects/wp-plugins/checkout-com-unified-payments-api) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/checkout-com-unified-payments-api/), check out the [SVN repository](https://plugins.svn.wordpress.org/checkout-com-unified-payments-api/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/checkout-com-unified-payments-api/) by [RSS](https://plugins.trac.wordpress.org/log/checkout-com-unified-payments-api/?limit=100&mode=stop_on_copy&format=rss). ## Changelog v5.1.2 22nd April 2026 – **[Security]**: Removed sensitive data from logs (API responses, POST/GET payloads, webhook bodies) Added nonce verification to express checkout AJAX endpoints Generic error messages returned to client; SQL queries hardened Added log redaction helpers; removed duplicate AJAX handler registrations – **[Bug Fixes]**:  Fixed multi-tab payment retry being incorrectly rejected by webhook Fixed Status Guard blocking refund/cancel webhooks to terminal states – **[Improvements]**: Admin manual order status changes no longer blocked by Status Guard Payment ID and Amount added to refund order notes across all gateways New “Skip Authorization Status Update” setting to prevent webhook race conditions on short capture delays v5.1.0 25th March 2026 – **[Core Payment Fixes]**: Multi-tab payment protection with “first capture wins” logic 3DS decline no longer redirects to success page Retry payments work correctly without showing declined messages Coupons/discounts now properly applied to payment amounts Capture timing calculated at submit time( not session creation) – **[Webhook Improvements]**: Prevent payment authorized webhook from downgrading completed orders Added fuzzy matching (Method 4) for orders when browser closes early Fixed duplicate detection issues – **[Flow Component Stability]**: Idempotent initialization preventing duplicate API calls (~50% faster) Address changes no longer trigger Flow reload (preserves card entry) Email changes properly trigger reload when needed APM orders created before payment popup – **[Security & Quality]**: XSS protection, nonce verification, input sanitization Added PHPStan, PHPCS, ESLint automated code review workflows E2E test suite with Playwright v5.0.4 5th March 2026 – **[feat]** Prevent Flow reload on address changes – send updates via handleSubmit API – **[feat]** Add state/county and phone fields to dynamic address updates – **[fix]** Coupon/discount amounts now read from live DOM instead of stale data – **[fix]** Fixed order-pay page address validation errors – **[improvement]** Removed verbose debug logs to reduce log noise v5.0.3 17th February 2026 – **[fix]** Use post-discount unit_price for Flow items to satisfy PayPal amount validation – **[fix]** Don’t add shipping line when free shipping is selected (prevents charging for shipping when merchant has no shipping charge) v5.0.2 25th January 2026 – **[feat]** Implement idempotent Flow initialization to prevent duplicate payment session requests – **[feat]** Add generation tracking and single-flight lock mechanism for initialization – **[feat]** Add destruction confirmation to handle transient DOM churn – **[perf]** Optimize state logging to only log actual value changes – **[fix]** Fix name field changes triggering Flow reload after initialization – **[improvement]** Production-ready improvements with comprehensive error handling v5.0.1 22nd January 2026 – **[fix]** Multiple installation issue – **[fix]** Flow module refactor for stability and 3DS return handling – **[fix]** Webhook duplicate detection and improved matching – **[style]** Checkout styling updates for payment method title spacing v.5.0.0 18th December 2025 – **[feat]** FLOW Integration : – Initial Flow integration release – Complete Flow Web Components integration – Saved cards functionality – 3D Secure support – Webhook queue system – Enhanced order management – Comprehensive validation and error handling v4.9.2 25th March 2025 – **[feat]** Enable Apple-pay on all browsers v4.9.1 18th March 2024 – **[fix]** Payment gateways on `order-pay` page v4.9.0 19th Novemeber 2024 – **[fix]** 422 error on Paypal Payment Gateway v4.8.0 30th October 2024 – **[remove]** Giropay Payment Support – **[feat]** Add Multi-region (KSA) on-soil payment processing – **[fix]** PHP 8.2 and PHPCS v4.7.0 12th July 2024 – **[tweak]** Upgrade Klarna integration v5.0.0_beta 4th November 2024 – **[feat]** Add Google Pay Express Checkout (product, shop, cart pages) – **[feat]** Unified Express Checkout container for PayPal and Google Pay – **[feat]** Blocks cart support for Express Checkout – **[feat]** Classic cart support for Express Checkout – **[fix]** Fix duplicate Express Checkout containers on cart page – **[fix]** Fix inconsistent button sizes in unified container – **[ fix]** Fix PHP syntax error in class-wc-checkoutcom-cards-blocks.php v4.6.0 27th June 2024 – **[feat]** Upgrade PayPal with Express Checkout – **[feat]** Update iDEAL APM with latest standard v4.5.0 15th Mar 2024 – **[feat]** Upgrade checkout-sdk-php library – **[feat]** Updated PayPal integration – **[fix]** PHP notices and warnings v4.4.20 31st Jan 2024 – **[tweak]** Add order note when 3ds redirection happens–**[ tweak]** Disable new webhook event from webhook registration v4.4.19 17th Jan 2024 – **[tweak]** Add new Webhook event types – **[fix]** PHP notices and warnings v4.4.18 11th Jan 2024 – **[tweak]** Apple Pay button condition to show on checkout page – **[fix]** Idempotency key not working after failed payment request v4.4.17 4th Dec 2023 – **[fix]** Fix incorrect use of method v4.4.16 24th Nov 2023 – **[tweak]** WC HPOS related fixes – **[tweak]** Add new configuration section to add ABC fallback account for refund process – **[fix]** PHP Non-static method call statically error v4.4.15 26th Sep 2023 – **[tweak]** Update IBAN input field validation and styling v4.4.14 20th March 2023 – **[tweak]** Update Giropay source property and description property v4.4.13 15th March 2023 – **[tweak]** Add payment retry if 3ds redirection link is expired with idempotency key v4.4.12 3rd March 2023 – **[tweak]** Update style of co-badged cards choice option–**[ tweak]** Implement idempotency key for payment request to avoid duplicate payment–**[ fix]** Credit card input filed not showing on small screen device – **[fix]** CVV error when new card is used and CVV required for saved card is enabled v4.4.11 8th February 2023 – **[tweak]** Update Google Pay logo and button styles–**[ fix]** WooCommerce order property access warning – **[fix]** Fix JS error of undefined v4.4.10 17th January 2023 – **[feat]** New settings to set custom placeholder for card input fields – **[tweak]** Always show Refund button for any order status –**[ tweak]** Make CVV input position dynamic for saved cards – **[fix]** Fix string missing translation v4.4.9 16th December 2022 – **[feat]** Accept SEPA payment with free subscription.–**[ tweak]** Added new filter `checkout_apm_sepa_address` on checkout with SEPA for address. – **[fix]** Ideal set hidden value. – **[fix]** Fix missing string translation. v4.4.8 4th November 2022 – **[fix]** Webhook notices logging. – **[fix]** Card holder name send undefined on add payment screen. – **[tweak]** Upgrade minimum required PHP version to 7.3 – **[tweak]** Apple Pay button JS event. – **[tweak]** Gateway icon `woocommerce_gateway_icon` filter usage. – **[tweak]** Add Google Pay& Apple Pay icon for gateway list on checkout. v4.4.7 18th August 2022 – **[fix]** Apple Pay MADA support. – **[fix]** Fix MOTO payment type. v4.4.6 8th August 2022 – **[feat]** Add PayPal payment method. – **[fix]** Fix MADA card not working Apple Pay. v4.4.5 22nd July 2022 – **[tweak]** Add version number to all script enqueue. –**[ tweak]** Use WC session for save card on checkout. – **[fix]** Payment method add not adding new if there is one card saved. v4.4.4 7th July 2022 – **[fix]** Frames not showing if saved card is deactivate. v4.4.3 7th July 2022 – **[feat]** Support for Carte Bancaire card. – **[feat]** Google Pay and Apple Pay subscription support added. – **[update]** Upgraded Checkout API SDK to latest version 2.5.1 – **[tweak]** Changed translation domain to match with plugin slug. – **[tweak]** Improved frame and related script enqueue. – **[ tweak]** Refactoring code and fix PHPCS error in plugin. v4.4.2 16th June 2022 – **[tweak]** Show refund button of completed orders. – **[ fix]** Default saved card deselects. – **[fix]** Customer name update on card tokenization. v4.4.1 1st June 2022 – **[tweak]** Add condition to not run code if order payment method is not cko. – **[update]** Update function usage from PHP 8 to 7 v4.4.0 24th May 2022 – **[feat]** Add refund support for APMs and Apple Pay. – **[ update]** Upgraded Checkout API SDK to latest version 2.4.0 – **[fix]** Order status not changing on webhook received. – **[fix]** Strings added for translation. v4.3.9 21st Apr 2022 – **[feat]** Add NAS account type support. – **[feat]** Add webhook registration and detection settings. – **[tweak]** Remove order status change in refund webhook. – **[fix]** Fix failed order status update on payment authorization.–**[ fix]** Fix PHP warnings. v4.3.8 4th Apr 2022 – **[feat]** Subscription support for SEPA DD payment method.–**[ feat]** Text domain support with pot file. – **[tweak]** 3Ds support to Google Pay method. – **[update]** New 3Ds parameter for card type method. v4.3.7 7th Mar 2022 – **[fix]** Fix PHP warning of missing file. v4.3.6 1st Mar 2022 – **[feat]** Multibanco payment method added – **[tweak]** Ability to pass customer IP address in payment requests – **[fix]** WooCommerce Recurring Failed to Authorize and Terminate subscription – **[fix]** DOC link ‘404 error’ in core settings has been fixed – **[update]** Trimmed token before sending to checkout.com v4.3.5 15 Dec 2021 . Update cko php sdk to cater for Klarna . Remove warning concerning php class_exists function used for subscription . Update Ideal logo v4.3.4 11 Aug 2021 . Fix conflict with the woo subscription plugin v4.3.3 29 Jul 2021 . Fix conflict with subscription class v4.3.2 28 Jul 2021 . Subscriptions-add payment source id on order . Handle refunds with amount having comma seperator . Prevent Auth and Capture having same order status on plugin configuration . Add validation to handle MADA card for apple pay for Saudi Arabia . Hide place order button when apple pay is selected . Fix google pay environment . handle php notices for php 7.4 . Include cardholder name in Frames. Fix apple pay supported network and country code v4.3.1 09 Jun 2021 . Add support for mada on apple pay v4.3.0 14 Apr 2021 . Added support to handle recurring payments via WooCommerce Subscriptions . Fixed payment declined webhook v4.2.2 29 Mar 2021 . Fixed 3ds redirection when protocol is https . Fixed fawry captured webhook . Hide default place order button when google pay is selected . Refactor Framejs integration . Refactor APMs integration v4.2.1 25 Feb 2021 . Set woo order id in metadata . Restrict declined reason in error message in case of risk declined response . Improve order note in backend orders . Update auto capture flow . Add support for approved webhook . Update post meta with payment_captured when payment response status is captured . Add validation to verify payment id when webhook is sent . Set order number as reference when capture and refund action happens . Fix UI for guest users . Change label in Alternative payments setting . Fix fawry product mismatch . Fix message translation in case of declined errors v4.2.0 25 Nov 2020 . The merchant can perform a partial refund in the Hub and it is reflected in Woo backend. . The partial refund amount is deducted from the transaction order amount in Woo. . The notification in Woo specifies that the transaction has been partially refunded. . The merchant is able to perform a partial refund from Woo backend. . The merchant is no longer required to use the private shared key for webhook authentication. The new release supports HMAC CKO Signature authentication.. Core settings persist during update of plugin . When performing a full refund in the Hub, the notification in Woo specifies that the transaction has been fully refunded. v4.1.16 26 Oct 2020 . Bug Fix – Removed saved card checkbox for guest users v4.1.15 29 Sep 2020 . Update Mada bins . Fixed mada bin file path . Fixed frames styling . Added condition to enqueue google pay script only if its selected . Remove timeout setting to allow iframe to load faster v4.1.14 09 June 2020 . Display Fawry number in order confirmation page . Fix fawry product qty in payment request v4.1.13 09 June 2020 Fix Fawry payment for virtual product v4.1.12 25 May 2020 Added support for payment declined webhook v4.1.11 15 May 2020 . Fixed Sepa payment . Added country validation based on apms v4.1.10 05 May 2020 . Send integration data in udf5 . Added multi iframe option. Minor css fix . Fixed frames fallback localisation for EN v4.1.9 16 March 2020 . Add display card icon option in module setting . Add alert when place order is clicked and card not valid . Add background color in frames field . Add language fallback for frames localization . Make translation text_domain uniform . Fix JCB icon height and width v4.1.8 17 Feb 2020 . Update frames js integration to frames v2 v4.1.7 12 Feb 2020 . Add function to get authorization value from header in case not apache web server . Remove sanitize text field from apple token to fix undefined error v4.1.6 06 Jan 2020 . Fixed cvv check validation . Auto select new card when there is no saved card . Fixed apple pay curl issue . Add validation for shipping and billing address v4.1.5 24 Dec 2019 . Fixed display issue for cvv field v4.1.4 20 Dec 2019 . Fixed module settings when saving configuration v4.1.3 20 Dec 2019 . Fixed settings not getting updated v4.1.2 12 Dec 2019 . Save default module configuration on initial setup . Minor bug fix v4.1.1 09 Dec 2019 . Update plugin name . Sanitize post fields . Fixed bug related to mada cards v4.1.0 18 Sep 2019 · Added support for apple pay . Removed phone number field from card payment requests . Fixed klarna bugs v4.0.2 18 Sep 2019 · Improvements – Update metadata with additional information v4.0.1 17 Sep 2019 · Bug Fix v4.0.0 3 Sep 2019 · Checkout.com Woocommerce module for the Unified Payments API ## Meta * Version **5.1.2** * Last updated **1 week ago** * Active installations **300+** * WordPress version ** 5.0 or higher ** * Tested up to **6.7.0** * PHP version ** 7.3 or higher ** * Tags * [apple pay](https://wordpress.org/plugins/tags/apple-pay/)[checkout](https://wordpress.org/plugins/tags/checkout/) [credit card](https://wordpress.org/plugins/tags/credit-card/)[payment gateway](https://wordpress.org/plugins/tags/payment-gateway/) [payments](https://wordpress.org/plugins/tags/payments/) * [Advanced View](https://wordpress.org/plugins/checkout-com-unified-payments-api/advanced/) ## Ratings 5 out of 5 stars. * [ 3 5-star reviews ](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/reviews/?filter=5) * [ 0 4-star reviews ](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/reviews/?filter=4) * [ 0 3-star reviews ](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/reviews/?filter=3) * [ 0 2-star reviews ](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/reviews/?filter=2) * [ 0 1-star reviews ](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/reviews/) ## Contributors * [ checkoutintegration ](https://profiles.wordpress.org/checkoutintegration/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/checkout-com-unified-payments-api/)