# _done email verifier API

**Canonical:** https://apis.io/apis/done/done-email-verifier-validator-api/  
**Provider:** _done — https://apis.io/providers/done/  
**Base URL:** https://email-verifier.underscoredone.com  
**Documentation:** https://underscoredone.com/email_verifier/

_done email verifier API is one of 28 APIs that [_done](https://apis.io/providers/done/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Email Verification. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

The email verifier API from _done -- 1 operation. POST /verify takes one email address and returns a deliverability verdict (valid/risky/invalid), splits username and domain, and flags free-provider domains and role accounts. Verified 2026-09-03: the spec resolves, an invented control path 404s, and an unpaid POST /verify answers 402 -- the x402 door works as the catalog describes. Submitted by the provider via apis.io/add (1a293a63); the build gate parked it as a curated-record collision and it was merged by hand, which is the designed path.

## Operations (1)

| Method | Path | Summary |
|---|---|---|
| POST | `/verify` | Verify if an email address is real and safe to send to |

## Machine-readable artifacts (3)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/done/refs/heads/main/openapi/done-email-verifier-validator-api-openapi.yml
- **OpenAPI** — https://email-verifier.underscoredone.com/openapi.json
- **Documentation** — https://underscoredone.com/email_verifier/

## Other _done APIs (12)

- [_done Catalog](https://apis.io/apis/done/done-catalog/)
- [_done asn lookup API](https://apis.io/apis/done/done-asn-lookup-api/)
- [_done cors headers API](https://apis.io/apis/done/done-cors-headers-api/)
- [_done Data API](https://apis.io/apis/done/done-data-api/)
- [_done directory submission API](https://apis.io/apis/done/done-directory-submission-api/)
- [_done Dmarc API](https://apis.io/apis/done/done-dmarc-api/)
- [_done dns lookup API](https://apis.io/apis/done/done-dns-lookup-api/)
- [_done domain age API](https://apis.io/apis/done/done-domain-age-api/)
- [_done domain availability API](https://apis.io/apis/done/done-domain-availability-api/)
- [_done Ens API](https://apis.io/apis/done/done-ens-api/)
- [_done hacker news API](https://apis.io/apis/done/done-hacker-news-api/)
- [_done http headers API](https://apis.io/apis/done/done-http-headers-api/)

## Tags

Email Verification

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/done/done-email-verifier-validator-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/done/.