# Email Verify API – Single Email Verification

> Email Verify API – Single Email Verification is a paid API for AI agents from email-verify-api-production-d262.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22, last successful call 2026-09-03).

Performs deep verification of a single email address including syntax, MX, SMTP RCPT probe, catch-all detection, disposable/role/free-provider flags, typo suggestions, and a 0–100 deliverability score with verdict.

## Facts

- Endpoint: POST https://email-verify-api-production-d262.up.railway.app/verify?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Last successful call: 2026-09-03
- Success rate: 100% of calls made through Zero
- Rating: 1.7 / 5 from 1 review
- Activations on Zero: 3
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-verify-api-single-email-verification-40019664
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ekn_85MGbdgazuvi4-n6r

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 email-verify-api-single-email-verification-40019664 -d '<json body>'
```

Example prompt: Can you fully verify jane.doe@acme.com for me — check if it actually exists, whether it's disposable or a catch-all, and give me a deliverability score?

## When to prefer this

Choose this endpoint when you need a comprehensive single-email verification that goes beyond syntax checking — specifically when you need SMTP-level delivery probing, disposable/catch-all/role-based detection, and a numeric score with verdict in one call. Prefer it over MX-only or syntax-only checks when you need actionable confidence about whether an email will actually be delivered. Use the batch sibling endpoint instead when verifying more than one email at a time.

## Known failure modes

- Missing or malformed email input returns a validation error
- SMTP probe may be blocked by the target mail server, reducing confidence
- Catch-all servers always accept RCPT probes, resulting in an inconclusive probe status
- Disposable provider list may not include brand-new throwaway domains
- Temporary DNS failures may cause MX lookup to fail even for valid domains
- Score may be conservative (low) for privacy-protected corporate domains

## How this service works

Verify a single email: syntax, MX records, SMTP RCPT probe, catch-all, disposable, role-based, free-provider, typo suggestion, 0-100 score, and verdict.

## Output

Returns a structured record for the email address including: syntax validity, MX record presence, SMTP RCPT probe outcome, catch-all flag, disposable provider flag, role-based address flag (e.g. info@, admin@), free-provider flag (e.g. Gmail, Yahoo), a typo suggestion if the domain looks misspelled, a numeric deliverability score from 0 to 100, and an overall verdict (e.g. valid, invalid, risky).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to verify, e.g. 'jane.doe@acme.com'."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-verify-api-single-email-verification-40019664/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-verify-api-production-d262.up.railway.app](https://www.zero.xyz/host/email-verify-api-production-d262.up.railway.app/llms.txt)