# gateway.apiosk.com Email Domain Check

> gateway.apiosk.com Email Domain Check is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Given an email address, classifies the associated domain as belonging to a company, detects if it is disposable or a free provider, and returns a confidence score.

## Facts

- Endpoint: POST https://gateway.apiosk.com/company-identity/email-domain-check
- Price: $0.02/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-domain-check-ebcdd1b9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sw06UrbfC01OeK5CPgkI4

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-domain-check-ebcdd1b9 -d '<json body>'
```

Example prompt: Can you check whether the email john.smith@acmecorp.com belongs to a real company domain, and tell me if it's disposable or a free provider like Gmail?

## When to prefer this

Use this endpoint when you need to quickly determine whether an email address belongs to a company versus a free or disposable provider — ideal for B2B lead qualification, CRM enrichment, or signup form validation where identifying professional email domains is important.

## Known failure modes

- Missing or malformed email address returns a validation error
- Unknown or very new domains may return low confidence scores
- Disposable providers using custom domains may be misclassified as company domains
- Network timeouts may occur under high load

## How this service works

Classify an email address by its domain: company vs. known free provider (Gmail/Outlook/…) vs. disposable domain. List-based heuristic, not a live DNS/MX check.

## Output

Returns a JSON object with the inferred entity type (e.g. 'company'), the extracted domain (e.g. 'acmecorp.com'), a confidence score between 0 and 1, a boolean indicating whether the domain is a disposable email service, and a boolean indicating whether it is a free email provider.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gateway-apiosk-com-email-domain-check-ebcdd1b9/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)