Introduction
ValidationCheck checks the contact details people give you: email addresses, phone numbers, IP addresses, and domains. Every check is a single POST with a JSON body, and every answer comes back in the same shape, with a verdict, a risk score, and a recommended action.
Base URL: https://api.validationcheck.net
| Check | Endpoint | Credits | Billed when |
|---|---|---|---|
| Email validation | POST /v1/email |
1 | Always |
| IP intelligence | POST /v1/ip |
1 | Always |
| Phone validation | POST /v1/phone |
1 | The number is valid |
| Number type | POST /v1/phone/type |
1 | Always |
| Domain age | POST /v1/domain/age |
1 | The domain is registered |
| Email DNS auth | POST /v1/domain/email-auth |
1 | Always |
| Combined risk check | POST /v1/check |
Sum of its parts | Per part |
| Account | GET /v1/account |
Free | — |
Repeat lookups within 7 days are free; see Credits and caching.
Next steps
Section titled “Next steps”- Quickstart: your first request in two minutes.
- Test mode: free, predictable answers for building and CI.
- API reference: every field of every endpoint, generated from the API itself.