Web APIs by Melissa
Melissa’s Web APIs provide a comprehensive solution for global data verification, cleansing, and enrichment to maintain reliable data. Verify, standardize and cleanse global identities, addresses, phones & emails, powered by AI-driven reference data. Our flexible APIs are designed for modern interfaces, including REST, JSON, and XML are easily accessible through our Developer Portal, where you can build, test, and explore integrations.
Enhance your data with geographic, demographic, and firmographic insights, along with U.S. property data for advanced enrichment. Melissa supports seamless integration with popular platforms such as Salesforce, Shopify, and more, making data management and governance simple and efficient. Whether you’re focused on data management, data validation, or leveraging our APIs into your website or mobile applications, Melissa helps you unlock the full potential of your data.
Get started with 1,000 complimentary credits! All you need is a Melissa account
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Postcoder
Postcoder is an API from Allies Computing that gives developers a single endpoint for verifying and validating customer contact data at the point of entry. Used across sectors from healthcare to retail, it's built to drop into checkout, onboarding, and account creation flows with minimal friction.
What's included:
Address lookup – Postcode, partial address, or coordinate-based search across Royal Mail PAF, Ordnance Survey AddressBase, and 249 countries worldwide.
Bank validation – Real-time sort code and account number verification, with branch data and direct debit eligibility returned in the response.
Email validation – Domain and formatting checks with disposable address detection.
Mobile validation – Live network status checks across 200+ countries.
OTP verification – SMS-based one-time password delivery.
Clear documentation, multi-language sample code, and a straightforward REST structure mean integration is quick. 30 day free trial with no credit card required.
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Hopewiser
Hopewiser is a leading provider of address validation, data cleansing, and data quality services, offering solutions designed to improve the accuracy and efficiency of business operations. The platform uses real-time data from sources like the Royal Mail Postcode Address File (PAF) to validate addresses, ensuring that businesses can confidently deliver to the right customers. Hopewiser also provides tools for email address validation, bank account verification, and data hygiene services, helping organizations reduce errors, prevent fraud, and enhance customer communication. Its offerings are available through cloud-based tools, standalone software, and professional consulting services.
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Melissa Data Quality Suite
Up to 20 percent of a company’s contacts contain bad data according to industry experts; resulting in returned mail, address correction fees, bounced emails, and wasted sales and marketing efforts. Use the Data Quality Suite to standardize, verify and correct all your contact data, postal address, email address, phone number, and name for effective communications and efficient business operations. Verify, standardize, & transliterate addresses for over 240 countries. Use intelligent recognition to identify 650,000+ ethnically-diverse first & last names. Authenticate phone numbers, and geo-data & ensure mobile numbers are live & callable. Validate domain, syntax, spelling, & even test SMTP for global email verification. The Data Quality Suite helps organizations of all sizes verify and maintain data so they can effectively communicate with their customers via postal mail, email, or phone.
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