https://www.twilio.com/en-us/products/email-api/email-address-validation-api
Email Address Validation API | Twilio
Stop email bounces at the source. Our Email Address Validation API uses machine learning to detect invalid, disposable, and mistyped addresses in real-time.
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https://zipcodestack.com/
ZIP Code API for Global Address Validation | zipcodestack.com
zipcodestack.com is a free ZIP code lookup API. It provides a well designed REST-API that returns all data in JSON-format.
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https://www.addressvalidator.com/
Address Validation for Shopify & BigCommerce
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https://check-mail.org/
Free email address validation API service, block disposable email
Check-Mail is a free API service to validate email addresses, to check if an email is valid or disposable. The API combines blacklists with advanced heuristics...
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https://www.zip-codes.com/
U.S. & Canada Postal Code Data: API, Database & Address Validation | ZIP-Codes.com
USPS and Canada Post licensed postal code data. REST API and downloadable databases for U.S. ZIP Codes, Canadian Postal Codes, ZIP+4, and boundary data....
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https://www.loqate.com/en-us/
Loqate | USPS & International Address Validation | US
Loqate offers type-ahead, real time address validation and data validation (phone, email), internationally and for USPS addresses.
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https://verifalia.com/
Verifalia - Email address validation, email list cleaning, email list hygiene, email list scrubbing
Accurate real-time email validation service: upload and clean your list or integrate email verification into your app with our API. Get started for FREE!
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https://www.mailboxvalidator.com/
Email Validation API - Verify Email Address | MailboxValidator
MailboxValidator email validation clean email lists and reduces bounce. It connects to the mail server and checks whether the mailbox exists or not.
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https://mailerio.com/
Email Validation Tool: Verify Email Address With Email Checker
Dec 11, 2025 - Email validation tool to check and verify emails instantly. Real-time API, bulk upload, and smart reporting for better deliverability.
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