# Hunter Email Verifier

> Hunter Email Verifier is a paid API for AI agents from Hunter at hunter.mpp.paywithlocus.com, paid per call via MPP, $0.008/call, status healthy (last checked 2026-10-12, last successful call 2026-09-14).

Verifies an email address for deliverability, checking MX records, SMTP validity, disposable status, and spam risk score

## Facts

- Endpoint: POST https://hunter.mpp.paywithlocus.com/hunter/email-verifier?utm_source=zero.xyz
- Price: $0.008/call
- Payment: MPP
- Status: healthy
- Last checked: 2026-10-12
- Last successful call: 2026-09-14
- Success rate: 100% of calls made through Zero
- Rating: 4.8 / 5 from 2 reviews
- Activations on Zero: 6
- Provider: Hunter
- Docs: https://hunter.io/api-documentation/v2
- Website: https://hunter.io
- Tags: email, verification, enrichment, outreach, data
- Canonical page: https://www.zero.xyz/c/hunter-email-verifier-1d1a2575
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LAoQn7Ihon-TXppl74FBZ

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 hunter-email-verifier-1d1a2575 -d '<json body>'
```

Example prompt: Can you verify whether john.smith@acmecorp.com is a real, deliverable email address — check if it has valid MX records and SMTP, and flag it if it's disposable or risky?

## When to prefer this

Use this endpoint when you need detailed, multi-signal email verification including MX record lookup, SMTP handshake, disposable domain detection, and deliverability scoring. Prefer this over simple regex-based validators when you need a confidence score and nuanced status (valid/risky/invalid/disposable). Ideal before sending cold outreach or importing contacts into a CRM to avoid bounces and protect sender reputation.

## Known failure modes

- Invalid or malformed email format returns a validation error
- Email domain has no MX records — smtp_check and mx_records will be false
- Disposable/temporary email domain detected — status set to 'disposable' and result flagged as risky
- Rate limit exceeded — API returns 429 Too Many Requests
- Missing required 'email' field in request body returns 400 Bad Request

## How this service works

Verify deliverability of an email address. Checks MX records, SMTP, and returns a confidence score.

## Output

Returns a JSON object with the verified email address, a numeric deliverability score, a status label (e.g. 'valid', 'risky', 'invalid', 'disposable'), boolean flags for disposable, webmail, gibberish, accept_all, regexp, mx_records, smtp_check, smtp_server, and block, plus any sources where the email was found.

## Example request

```json
{
 "email": "zero-qa@agentmail.to"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "email"
 ],
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to verify"
  }
 },
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hunter-email-verifier-1d1a2575/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hunter.mpp.paywithlocus.com](https://www.zero.xyz/host/hunter.mpp.paywithlocus.com/llms.txt)