Compare Data Validation APIs
Deep dive into the technical specifications of 7 Data Validation APIs. Use this side-by-side comparison to evaluate which service best fits your architectural requirements.
| API Identity | Score | Authentication | HTTPS | CORS | Speed | Difficulty | Brief |
|---|---|---|---|---|---|---|---|
| VATlayer | 72 B Est. | API Key | ? | - | Intermediate | VATlayer is a REST API for validating EU VAT numbers in real time against official EU VIES (VAT Info... | |
| Lob.com | 82 A Est. | API Key | ? | - | Intermediate | Lob.com provides a US Address Verification API that validates, standardizes, and geocodes US mailing... | |
| Postman Echo | 87 A Measured | No Auth | ? | 299ms | Beginner | Postman Echo is a free HTTP test server that mirrors back exactly what you send — headers, query par... | |
| PurgoMalum | 85 A Measured | No Auth | ? | 466ms | Beginner | PurgoMalum is a free, no-auth REST API for filtering profanity and obscene words from text, returnin... | |
| US Autocomplete | 47 D Est. | API Key | Yes | - | Intermediate | Smarty's US Autocomplete Pro API provides real-time US address suggestions as users type, returning ... | |
| US Extract | 47 D Est. | API Key | Yes | - | Intermediate | Smarty's US Extract API scans any block of unstructured text — emails, documents, web pages — and ex... | |
| US Street Address | 52 D Est. | API Key | Yes | - | Intermediate | The Smarty US Street Address API validates and enriches US postal addresses in real time, returning ... |