{"id":2177,"date":"2017-08-22T00:00:00","date_gmt":"2017-08-22T00:00:00","guid":{"rendered":"https:\/\/www.mailboxvalidator.com\/resources3\/articles\/introduction-to-mailboxvalidator-api\/"},"modified":"2026-07-30T07:53:29","modified_gmt":"2026-07-30T07:53:29","password":"","slug":"introduction-to-mailboxvalidator-api","status":"publish","type":"docs","link":"https:\/\/www.mailboxvalidator.com\/resources\/articles\/introduction-to-mailboxvalidator-api\/","title":{"rendered":"Introduction to the MailboxValidator API"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter\"><a href=\"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3.png\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"300\" src=\"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3-600x300.png\" alt=\"Introduction-to-MailboxValidator-API\" class=\"wp-image-1063\" srcset=\"https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3-600x300.png 600w, https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3-300x150.png 300w, https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3-1024x512.png 1024w, https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3-768x384.png 768w, https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3-50x25.png 50w, https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3-920x460.png 920w, https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3-320x160.png 320w, https:\/\/www.mailboxvalidator.com\/resources\/wp-content\/uploads\/2020\/01\/mbv_articles_img3.png 1200w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Overview<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The MailboxValidator Single Validation API is an easy to use RESTful API that allows users to programmatically validate a single email address. This is useful for programmers who want to have email validation functionalities in their own programs or websites.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are unfamiliar with the term RESTful, you should read up on REST below:<br>\n<a href=\"https:\/\/en.wikipedia.org\/wiki\/Representational_state_transfer\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Representational_state_transfer<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pre-requisite<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To use the API, you will need to sign up for an API key. If you haven&#8217;t done so, just go to the <a href=\"http:\/\/www.mailboxvalidator.com\/plans#api\">API plans page<\/a> and sign up for the free API plan.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Basic usage<\/h2>\n\n\n\n<div class=\"betterdocs-code-snippet-wrapper theme-light betterdocs-code-snippet-bc0f6cff\"\n     id=\"betterdocs-code-snippet-bc0f6cff\"\n     data-language=\"bash\"\n     data-copy-button=\"true\">\n\n            <div class=\"betterdocs-code-snippet-header betterdocs-file-preview-header\">\n        <div class=\"betterdocs-file-preview-left\">\n                            <div class=\"betterdocs-traffic-lights\">\n                    <span class=\"traffic-light traffic-light-red\"><\/span>\n                    <span class=\"traffic-light traffic-light-yellow\"><\/span>\n                    <span class=\"traffic-light traffic-light-green\"><\/span>\n                <\/div>\n            \n            <div class=\"betterdocs-file-info\">\n                \n                            <\/div>\n        <\/div>\n\n        <div class=\"betterdocs-file-preview-right\">\n                            <div class=\"betterdocs-code-snippet-copy-container\">\n                    <button class=\"betterdocs-code-snippet-copy-button\"\n                            type=\"button\"\n                            data-clipboard-target=\"#betterdocs-code-snippet-bc0f6cff .betterdocs-code-snippet-code code\"\n                            aria-label=\"Copy code to clipboard\">\n                        <svg width=\"16\" height=\"16\" viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                            <path d=\"M16 1H4C2.9 1 2 1.9 2 3V17H4V3H16V1ZM19 5H8C6.9 5 6 5.9 6 7V21C6 22.1 6.9 23 8 23H19C20.1 23 21 22.1 21 21V7C21 5.9 20.1 5 19 5ZM19 21H8V7H19V21Z\" fill=\"currentColor\"\/>\n                        <\/svg>\n                    <\/button>\n                                    <\/div>\n                    <\/div>\n        <\/div>\n    \n    <div class=\"betterdocs-code-snippet-content\">\n        \n        <pre class=\"betterdocs-code-snippet-code language-bash\"><code>GET https:\/\/api.mailboxvalidator.com\/v1\/validation\/single?email=test@test.com&amp;key=&lt;your API key&gt;&amp;format=&lt;json or xml&gt;<\/code><\/pre>\n    <\/div>\n<\/div>\n\n<script type=\"text\/javascript\">\ndocument.addEventListener('DOMContentLoaded', function() {\n    \/\/ Initialize copy functionality for this specific snippet\n    const snippet = document.getElementById('betterdocs-code-snippet-bc0f6cff');\n    if (snippet && window.BetterDocsCodeSnippet) {\n        window.BetterDocsCodeSnippet.initCopyButton(snippet);\n    }\n});\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\">There are basically 2 parameters when doing a <em>GET<\/em> call to the API. The <strong>email<\/strong> parameter is the email address that you wish to validate while the <strong>key<\/strong> parameter is the API key that you should have signed up for in the pre-requisite section above.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You may have noticed that there is a third parameter <strong>format<\/strong>. This parameter is optional and has a default value of <strong>json<\/strong>. Therefore the API will return results in a JSON string unless otherwise specified.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Results<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you didn&#8217;t specify the format or you chose <strong>json<\/strong>, you will see something like below:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n  \"email_address\": \"test@test.com\",\n  \"domain\": \"test.com\",\n  \"is_free\": \"True\",\n  \"is_syntax\": \"True\",\n  \"is_domain\": \"True\",\n  \"is_smtp\": \"True\",\n  \"is_verified\": \"False\",\n  \"is_server_down\": \"False\",\n  \"is_greylisted\": \"False\",\n  \"is_disposable\": \"False\",\n  \"is_suppressed\": \"False\",\n  \"is_role\": \"False\",\n  \"is_high_risk\": \"True\",\n  \"status\": \"False\",\n  \"credits_available\": 297,\n  \"error_code\": \"\",\n  \"error_message\": \"\"\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If you chose <strong>xml<\/strong> explicitly, then you&#8217;ll see the below:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;response&gt;\n\t&lt;email_address&gt;test@test.com&lt;\/email_address&gt;\n\t&lt;domain&gt;test.com&lt;\/domain&gt;\n\t&lt;is_free&gt;True&lt;\/is_free&gt;\n\t&lt;is_syntax&gt;True&lt;\/is_syntax&gt;\n\t&lt;is_domain&gt;True&lt;\/is_domain&gt;\n\t&lt;is_smtp&gt;True&lt;\/is_smtp&gt;\n\t&lt;is_verified&gt;False&lt;\/is_verified&gt;\n\t&lt;is_server_down&gt;False&lt;\/is_server_down&gt;\n\t&lt;is_greylisted&gt;False&lt;\/is_greylisted&gt;\n\t&lt;is_disposable&gt;False&lt;\/is_disposable&gt;\n\t&lt;is_suppressed&gt;False&lt;\/is_suppressed&gt;\n\t&lt;is_role&gt;False&lt;\/is_role&gt;\n\t&lt;is_high_risk&gt;True&lt;\/is_high_risk&gt;\n\t&lt;status&gt;False&lt;\/status&gt;\n\t&lt;credits_available&gt;296&lt;\/credits_available&gt;\n\t&lt;error_code&gt;&lt;\/error_code&gt;\n\t&lt;error_message&gt;&lt;\/error_message&gt;\n&lt;\/response&gt;<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Whichever format you choose, the results are still the same. So select whichever works best in the programming language that you need.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For more info on the API, check out the <a href=\"http:\/\/www.mailboxvalidator.com\/api-single-validation\">API documentation page<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Auto renewal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The MailboxValidator API plans are all operating on a 30-day cycle. This means the credits you have purchased must be used up within 30 days of purchase or they will be forfeited. At the end of the 30 days, your stored credit card will be charged and your subscription to the API will be auto renewed. You can unsubscribe at any time via the MailboxValidator user area after you have logged in.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Auto recharge<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you have used up your credits before the end of the 30-day cycle, our system will auto recharge your credits to the full amount as per your subscribed plan. Your stored credit card will then be charged and your 30-day cycle begins again.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Upgrading or Downgrading Your Plan<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you require more credits per billing cycle, simply log into the user dashboard. Next, click on the <strong>Upgrade <\/strong>option and select your new tier.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Conversely, you can opt to reduce your plan if you require fewer credits. To do this, click on <strong>Downgrade <\/strong>and choose a smaller package.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These two actions do not apply immediately. Instead, they are scheduled to become effective at the start of your next billing cycle. Furthermore, you can easily cancel these pending changes anytime before the current cycle ends.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Canceling Your Subscription<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Alternatively, you may wish to stop all future charges to your credit card. For this reason, you can simply click on the <strong>Unsubscribe<\/strong> button.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Please note that this action takes effect instantly. Therefore, your subscription will be immediately terminated and your API access will be disabled right away.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The MailboxValidator Single Validation API is an easy to use RESTful API that allows users to programmatically validate a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"doc_category":[67],"doc_tag":[],"class_list":["post-2177","docs","type-docs","status-publish","hentry","doc_category-mailboxvalidator-articles"],"year_month":"2026-08","word_count":710,"total_views":"13","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"mbv_editor","author_nicename":"mbv_editor","author_url":"https:\/\/www.mailboxvalidator.com\/resources\/author\/mbv_editor\/"},"doc_category_info":[{"term_name":"MailboxValidator Articles","term_url":"https:\/\/www.mailboxvalidator.com\/resources\/article-categories\/mailboxvalidator-articles\/"}],"doc_tag_info":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - 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