Best Data Validation APIs (2026)

Official French address validation service

Connection for brevo CRM suite

US Address Verification

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

Test api server to receive and return value from HTTP method

Content validator against profanity & obscenity

Enter address data quickly with real-time address suggestions

Extract postal addresses from any text including emails

Validate and append data for any US postal address

This API validates postal codes within UK

VAT Number Validation & Lookup REST API

VAT number validation