{"id":22380,"date":"2026-10-12T14:47:56","date_gmt":"2026-10-12T18:47:56","guid":{"rendered":"https:\/\/membermouse.com\/?post_type=ht_kb&#038;p=22380"},"modified":"2026-10-12T15:46:51","modified_gmt":"2026-10-12T19:46:51","slug":"migrating-from-legacy-paypal-to-paypal-checkout","status":"publish","type":"ht_kb","link":"https:\/\/membermouse.com\/de\/docs\/migrating-from-legacy-paypal-to-paypal-checkout\/","title":{"rendered":"Migrating from Legacy PayPal to PayPal Checkout"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">PayPal is retiring Website Payments Standard, the system behind MemberMouse&#8217;s original PayPal integration, in January 2027. MemberMouse 3.1.2 adds <strong>PayPal Checkout<\/strong>, which uses PayPal&#8217;s current REST APIs, and an <strong>Upgrade Wizard<\/strong> that moves your site over in eight steps.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The wizard only changes how <strong>new<\/strong> purchases are taken. Members who already pay you through legacy PayPal keep billing on legacy PayPal, and MemberMouse never cancels or moves them for you.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Which MemberMouse versions this applies to<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sites that use <strong>legacy PayPal<\/strong> on <strong>MemberMouse 3.1.1 or earlier<\/strong> and are updating to <strong>3.1.2 or later<\/strong>.<\/li>\n\n\n\n<li>New to PayPal on 3.1.2 or later, with no legacy PayPal? Use <em>Configuring PayPal Checkout<\/em> instead.<\/li>\n<\/ul>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Before you start<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Take a backup of your site&#8217;s files and database.<\/li>\n\n\n\n<li>You need a PayPal <strong>Business<\/strong> account and access to the PayPal Developer Dashboard (developer.paypal.com), signed in with that Business account.<\/li>\n\n\n\n<li>Your site must be reachable over <strong>https<\/strong> on its public domain. PayPal will not send webhooks to an <code>http:\/\/<\/code> address or to a local or staging address it cannot reach.<\/li>\n\n\n\n<li>Allow about 15 minutes.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Step 1: Update MemberMouse to 3.1.2<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Update MemberMouse as you normally would. If you update by uploading the zip file, go to <strong>Plugins &gt; Add Plugin &gt; Upload Plugin<\/strong>, choose <code>membermouse.zip<\/code> and click <strong>Install Now<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 2: Start the Upgrade Wizard<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Go to the MemberMouse dashboard. Because legacy PayPal is active, MemberMouse shows an <strong>Upgrade to PayPal Checkout<\/strong> notice. Click <strong>Start Upgrade Wizard<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/089e4818-05-dashboard-upgrade-notice.png\" alt=\"Upgrade to PayPal Checkout notice\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can also open the wizard at any time from <strong>MemberMouse &gt; Payment Settings &gt; PayPal Upgrade<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The first screen lists the eight steps. Click <strong>Continue<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/07b74d52-06-wizard-step1-welcome.png\" alt=\"Wizard step 1, Welcome\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The wizard saves your progress, so you can leave and come back to the step you were on.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 3: Get your REST API credentials from PayPal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PayPal Checkout connects with a <strong>Client ID<\/strong> and <strong>Secret<\/strong> from a REST app in your PayPal Developer Dashboard. These are not the API Username, Password and Signature that legacy PayPal used.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Sign in at developer.paypal.com and open <strong>Apps &amp; Credentials<\/strong>.<\/li>\n\n\n\n<li>Use the <strong>Sandbox \/ Live<\/strong> switch at the top left to choose the environment. Use <strong>Live<\/strong> for your real store and <strong>Sandbox<\/strong> only for testing.<\/li>\n\n\n\n<li>Click <strong>Create App<\/strong>, or open an app you already use for this site.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/850ccb51-09-paypal-developer-apps-and-credentials.png\" alt=\"Apps &amp; Credentials\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>If you are creating an app, give it a name (for example, your site&#8217;s name), leave <strong>Type<\/strong> set to <strong>Merchant<\/strong>, and click <strong>Create App<\/strong>.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/85c748bf-10-paypal-create-app-form.png\" alt=\"Create App\" style=\"width:394px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li>On the app&#8217;s page, copy the <strong>Client ID<\/strong>. Click the eye icon next to <strong>Secret key 1<\/strong> to show it, then copy it.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/48e2ab5c-11-paypal-app-client-id-and-secret.png\" alt=\"Client ID and Secret\" style=\"aspect-ratio:2.1275922114927974;width:673px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Keep these private. Anyone with your Client ID and Secret can act on your PayPal account. Use a separate REST app for each website, including staging copies.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 4: Connect your PayPal account (wizard step 2)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Paste the <strong>Client ID<\/strong> and <strong>Secret<\/strong> into the wizard.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/cc0a1075-07-wizard-step2-connect-live-fields.png\" alt=\"Wizard step 2, Live fields\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are testing with sandbox credentials, tick <strong>Use sandbox credentials for testing<\/strong> first. The fields change to <strong>Sandbox Client ID<\/strong> and <strong>Sandbox Secret<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/663830cf-08-wizard-step2-sandbox-ticked.png\" alt=\"Wizard step 2, Sandbox ticked\" style=\"width:554px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Click <strong>Save &amp; Continue<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/3c68a772-12-wizard-step2-credentials-entered.png\" alt=\"Credentials entered\" style=\"width:578px;height:auto\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Step 5: Skip Partner Connect (wizard step 3)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">One-click Partner Connect is not part of this release. Click <strong>Skip This Step<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/66eb6129-13-wizard-step3-partner-connect-skip.png\" alt=\"Wizard step 3, Partner Connect\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Step 6: Verify your credentials (wizard step 4)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Click <strong>Verify Credentials<\/strong>. MemberMouse asks PayPal for an access token with the Client ID and Secret you entered. If they are valid, the wizard moves on to step 5. If not, go back to step 2 and check that you copied both values from the same app and the same environment (Live or Sandbox).<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/be78b4ea-14-wizard-step4-verify-credentials.png\" alt=\"Wizard step 4, Verify Credentials\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Step 7: Register webhooks (wizard step 5)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Webhooks are how PayPal tells MemberMouse about payments, renewals, refunds and cancellations. The wizard shows your site&#8217;s webhook URL and registers it with PayPal for you. Click <strong>Register Webhooks<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/68d21eeb-15-wizard-step5-register-webhooks.png\" alt=\"Wizard step 5, Register Webhooks\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check that the <strong>Webhook URL<\/strong> starts with <code>https:\/\/<\/code> and uses your live domain. If it shows <code>http:\/\/<\/code>, fix your WordPress Address and Site Address under <strong>Settings &gt; General<\/strong> before you continue. PayPal will not deliver webhooks to that address, and the wizard cannot go live without a registered webhook.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After this step you can see the webhook in your PayPal app, under <strong>Webhooks<\/strong>, with the eight events MemberMouse uses:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/819d18fe-23-paypal-app-webhook-registered-by-wizard.png\" alt=\"Webhook registered by the wizard\" style=\"aspect-ratio:4.6964270114440465;width:656px;height:auto\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Step 8: Sync your products (wizard step 6)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PayPal Checkout needs a PayPal billing plan for each recurring product. Click <strong>Check Products (Dry Run)<\/strong> to see which products will be synced without changing anything.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/9a08858c-16-wizard-step6-sync-products.png\" alt=\"Wizard step 6\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Only recurring products appear. One-time products do not need a billing plan and are left out.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/f37e76e9-17-wizard-step6-dry-run-results.png\" alt=\"Dry run results\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Click <strong>Sync Products<\/strong>. MemberMouse creates the plans in PayPal and moves to step 7 when it is done.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 9: Existing subscribers (wizard step 7)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This step is information only. Your existing legacy PayPal subscribers keep billing on legacy PayPal. The migration does not cancel them, convert them or email them. Click <strong>Continue<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/0c9edc68-18-wizard-step7-existing-subscribers.png\" alt=\"Wizard step 7, Existing Subscribers\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Step 10: Activate PayPal Checkout (wizard step 8)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The last step confirms what is configured. Click <strong>Finish \u2014 Activate Checkout<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/c48509de-19-wizard-step8-activate-checkout.png\" alt=\"Wizard step 8, Activate\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PayPal Checkout is now switched on for new purchases. Under <strong>Payment Settings > Payment Methods<\/strong> you will see <strong>PayPal Checkout<\/strong> ticked below the legacy <strong>PayPal<\/strong> method. The wizard leaves legacy <strong>PayPal<\/strong> ticked. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/ba141d36-21-after-payment-methods-paypal-checkout-enabled.png\" alt=\"PayPal Checkout enabled\" style=\"width:443px;height:auto\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">After the migration: the Migration Status page<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Go to <strong>Payment Settings &gt; Migration Status<\/strong> to see how many active subscriptions are on each system.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/99f48e3d-20-migration-status-page.png\" alt=\"Migration Status\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Active Legacy PayPal Subscriptions<\/strong>: members still billing through legacy PayPal. They are listed under <strong>Legacy Subscribers<\/strong>.<\/li>\n\n\n\n<li><strong>Active PayPal Checkout Subscriptions<\/strong>: subscriptions taken through PayPal Checkout.<\/li>\n\n\n\n<li><strong>Migrated to PayPal Checkout<\/strong>: the PayPal Checkout figure as a percentage of all active PayPal subscriptions. New PayPal Checkout customers count toward it, so it rises as you take new sales even if no legacy member has switched.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/wpgcbucket\/wp\/2026\/10\/2e54e543-22-migration-status-after-first-checkout-sale.png\" alt=\"Migration Status after a new sale\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once the wizard is finished, the dashboard notice changes to <strong>PayPal Legacy Integration Is Shutting Down<\/strong>, with a count of your grandfathered legacy subscribers and a link to this page.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Check your checkout page<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">With both methods active, the default checkout button SmartTag (<code>[MM_Form_Button type='all' ...]<\/code>) shows <strong>two<\/strong> &#8220;Checkout using PayPal&#8221; buttons that look the same. The first is legacy PayPal and the second is PayPal Checkout.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To offer only PayPal Checkout to new buyers, replace the default button SmartTag on your checkout page with a button for PayPal Checkout alone:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;a href=\"&#91;MM_Form_Button type='submit' paymentMethod='paypal_checkout']\"&gt;Pay with PayPal&lt;\/a&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If you also accept cards through an onsite payment method such as Stripe, keep a submit button for that method as well.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Make a test purchase with the PayPal Checkout button. The buyer sees a short MemberMouse page with PayPal&#8217;s buttons, approves the payment in a PayPal window, and is returned to your confirmation page automatically.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Related articles<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/membermouse.com\/docs\/configuring-paypal-legacy\/\">Configuring Legacy PayPal (Website Payments Standard)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/membermouse.com\/docs\/configuring-paypal\/\">Configuring PayPal Checkout<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/membermouse.com\/docs\/troubleshooting-paypal\/\">Troubleshooting PayPal<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/membermouse.com\/docs\/using-paypal-ipn-log\/\">Using the PayPal IPN Log<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>PayPal is retiring Website Payments Standard, the system behind MemberMouse&#8217;s original PayPal integration, in January 2027. MemberMouse 3.1.2 adds PayPal Checkout, which uses PayPal&#8217;s current REST APIs, and an Upgrade&#8230;<\/p>","protected":false},"author":18796,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"ht-kb-category":[],"ht-kb-tag":[],"class_list":["post-22380","ht_kb","type-ht_kb","status-publish","format-standard","hentry"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"PayPal is retiring Website Payments Standard, the system behind MemberMouse&#039;s original PayPal integration, in January 2027. MemberMouse 3.1.2 adds PayPal Checkout, which uses PayPal&#039;s current REST APIs, and an Upgrade Wizard that moves your site over in eight steps. The wizard only changes how new purchases are taken. 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