# gateway.apiosk.com Email Verification

> gateway.apiosk.com Email Verification is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.13/call, status unknown (last checked 2026-09-14).

Validates an email address by checking format, DNS/MX records, SMTP deliverability, disposable domain status, and role-account classification, returning a confidence score.

## Facts

- Endpoint: GET https://gateway.apiosk.com/email-verification/check
- Price: $0.13/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gateway-apiosk-com-email-verification-a5174e2b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4HqdTmpA2iCqwqf2zljDM

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability gateway-apiosk-com-email-verification-a5174e2b
```

Example prompt: Can you verify whether support@apple.com is a real, deliverable email address — I want to know if it passes format checks, has valid MX records, and whether the mailbox actually responds to SMTP, and tell me if it's a role account or disposable address?

## When to prefer this

Use this endpoint when you need a comprehensive, multi-layered email validation that goes beyond simple format checking — especially when you need SMTP-level deliverability verification, disposable email detection, and role-account classification in a single call. Prefer it over simple regex validators when data quality for outreach, registration, or CRM enrichment is critical.

## Known failure modes

- Invalid or missing email parameter returns an error response
- SMTP check may time out or be blocked by the mail server, returning null for smtp_check
- catch_all field returns null when the server's catch-all behavior cannot be determined
- Disposable domain database may not cover very new throwaway providers
- Rate limiting or payment failure results in a 402 response requiring x402 payment

## How this service works

Validate a single email address: format, MX, SMTP mailbox check, and disposable/role/free classification with a deliverability score.

## Output

Returns a JSON object with: overall confidence score (0–1), format validity flag, domain, MX record found flag, SMTP check result, disposable email flag, role account flag, free email provider flag, extracted username, and a 'did you mean' suggestion if a typo is detected.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gateway-apiosk-com-email-verification-a5174e2b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gateway.apiosk.com](https://www.zero.xyz/host/gateway.apiosk.com/llms.txt)