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What are the best Data Validation APIs? (2026)

The top Data Validation API right now is API Adresse, followed by Brevo Suit and 10 more. We compared 12 Data Validation APIs across 3,171 total APIs on patchBay to find the best options for developers.

12APIs ranked
Last updated Mar 23, 2026
Browse all Data Validation APIsCompare Data Validation APIs

What Data Validation APIs are available?

12 APIs

API Adresse

Official French address validation service

No AuthHTTPS

Brevo Suit

Connection for brevo CRM suite

apiKeyHTTPSCORS

Lob.com

US Address Verification

apiKeyHTTPS

Nonprofit Check Plus

Verify charities via EIN using IRS, PUB78, BMF & OFAC data for compliance and legitimacy

apiKeyHTTPS

Postman Echo

Test api server to receive and return value from HTTP method

No AuthHTTPS

PurgoMalum

Content validator against profanity & obscenity

No Auth

US Autocomplete

Enter address data quickly with real-time address suggestions

apiKeyHTTPSCORS

US Extract

Extract postal addresses from any text including emails

apiKeyHTTPSCORS

US Street Address

Validate and append data for any US postal address

apiKeyHTTPSCORS

Validate UK Postcodes

This API validates postal codes within UK

apiKeyHTTPSCORS

VatcheckAPI

VAT Number Validation & Lookup REST API

apiKeyHTTPSCORS

VATlayer

VAT number validation

apiKeyHTTPS

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