Email Validation APIHere’s a list of useful APIs to help you determine if that email address is real :)

  1. Verify Email –  simple api that checks if an email address if valid and exists. It checks the format of the address then tries to contact the server to make sure the address exists.
  2. Social Media Email Search – This API allows searching the popular social networks (facebook, linkedin, twitter, tumblr, myspace) for an email address. If found, the site ID will be returned.
  3. Fluxifi Tools – Miscellaneous tools for getting page rank, page speed, validating domains & emails
  4. Email Validator – Checks for fake DNS as well as uses regex functions to check the email for the right length and accepted characters.
  5. Email Search by EmailSherlock – A reverse email search conducted at can help determine the identity of the owner of an unknown address that shows up in your inbox.
  6. FullContact Person – The FullContact Person API takes a piece of contact information, such as an email address, and adds information such as name, job title, and social profile data from more than 120 different social networks – including Facebook, Twitter, LinkedIn, and more.
  7. Block Disposable Email – The api helps to detect domains of disposable email address services such as, spamgourmet. In other words: if you need to keep your userbase clean you should avoid throw-away, one-time, instant, temporary email addresses.
  8. Mailgun Email Validation – This API endpoint is an email address validation service. Given an arbitrary address, we will validate the address based on: Syntax checks (RFC defined grammar), DNS validation, Spell checks, Email Service Provider (ESP) specific local-part grammar (if available).
  9. Email Pie – Email Pie is a wonderful little JSON API that gives you a simple way to validate email addresses. We’ll let you know if that email address is legit or not.
  10. Free Email Verifier – You can use the API to verify emails via our site if you are a registered user.
  11. Byteplant – With our free email validation service you can easily verify if an email address is real and valid.
  12. Data 8 Email Validation Web Service API – Check email addresses as they are entered, right down to individual mailbox level. Correct errors in both the mailbox name and domain name parts of the address automatically.
  13. DOTS Email Validation 3 – Improve the effectiveness of your email list marketing—instantly identify invalid email addresses in your customer database. DOTS Email Validation 3SM by Service Objects is a real-time web service API that determines if an email address is genuine, accurate and deliverable.
  14. PostcodeAnywhere Email Validation – The API lets you validate email addresses either on an individual basis or as a batch of up to 100 addresses. Tests will check for the existence of an appropriate mail server as well as performing syntax checks.
  15. Email Checker – Email verification you can trust. Batch or real-time email verification. Deep checking down to mailbox level.
  16. Verifalia – Software developers love to integrate Verifalia within their software applications, as the whole email validation service is exposed via an elegant and secure REST API, which uses JSON as its primary data interchange format. A couple of lines of code and Verifalia will validate email addresses from within your own applications!
  17. BriteVerify – Never lose another conversion because of a user input error. Simply copy and paste a couple lines of code into your existing web form, mobile application, CRM or POS and emails are verified as instantly as they are entered.
  18. MelissaData Email Verification – Validate and parse email addresses, correct common typographical errors, and standardize email addresses as they are entered with Melissa Data’s Email Validation solutions. These solutions eliminate the need for a “confirm email” field which can decrease webform conversion rates.
  19. LeadSpend – Prompt users to correct invalid email address in-form or filter out bad addresses as they enter your system with our validation API. We provide JavaScript code that integrates seamlessly with your existing forms to validate email addresses without inconveniencing your visitors. Our hosted email validation API can be integrated at any point in your email collection funnel.
  20. ListWise – We analysed the results of the hundreds of millions of email addresses we have cleaned to design a new email list-cleaning engine that is more powerful than ever. Try ListWise II for free and take your email marketing performance to new highs.
  21. StrikeIron – Building upon the past decade of experience, StrikeIron has created two Email Verification Solutions that instantly detect the validity and reliability of email addresses. These solutions will increase your email deliverability, as well as enhance email marketing campaign performance and customer relationship management.
  22. TowerData - By using TowerData’s Email Verification API to clean and correct email addresses at the point of entry, you’ll improve both the quality of your email list and your email delivery rates.
  23. Emaitor – Our API will ensure your customers enter a valid email address and receive their order details, saving your business crucial customer service time. The Emailtor API will minimize your visitors from entering false or typo based emails.
  24. Webemailverifier – Swift Email Verifier offers a real-time email validation and scrubbing APIs (Application Programming Interface) accessible via aRESTful API call.
  25. Accudata – Validate email addresses to keep your marketing data clean Protect and improve your IP reputation Increase your chances to make it to the inbox
  26. EmailValidate – EmailValidate is a web service which validates email addresses using various methods, including: Syntax validation, MX record lookup, SMTP availability
  27. Experian – Experian Data Quality offers a hosted web service, ideal for cleaning email addresses from customer-facing websites or internal web applications. QAS Email accurately identifies whether an email address is valid and deliverable, allowing you to remove harmful email addresses before you mail.
  28. – determines if an email address is not only valid, but associated with an actual user.
  29. FreshAddress – FreshAddress validates the email address, corrects typos and misspellings, and protects your email list from damaging but deliverable addresses, such as spam traps, honeypots, etc.
  30. MailboxValidator – MailboxValidator helps to clean up your email list. It connects to the mail server and checks whether the mailbox exists or not.
  31. DataValidation – Analyzes your email list for invalid emails, opt-outs, bounce history, and complainers.
  32. QuickEmailVerification – Free Email Verification Service to improve your mail deliverability rates and protect your IP reputation
  33. Bulk Email Checker – Email Validation Service – 10,000 emails for $9.95

Want to add your API on this list?  Tweet to @mashape

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