# Hunter Email Verifier via Locus x402

> Hunter Email Verifier via Locus x402 is a paid API for AI agents from hunter.x402.paywithlocus.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14).

Verifies whether a given email address is valid and deliverable using Hunter's email verification service, billed per-call via x402 micropayments.

## Facts

- Endpoint: POST https://hunter.x402.paywithlocus.com/hunter/email-verifier
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hunter-email-verifier-via-locus-x402-545b7320
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dUgo3-WVMQXbmgZ-3MYc5

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-via-locus-x402-545b7320 -d '<json body>'
```

Example prompt: Can you verify whether the email address john.smith@acmecorp.com is valid and actually deliverable before I add it to my outreach list?

## When to prefer this

Use this endpoint when you need per-email verification billed as a micropayment via x402/USDC, especially in agent workflows where you want pay-as-you-go pricing without a monthly Hunter.io subscription. Ideal for validating individual email addresses before outreach, CRM import, or lead scoring. Choose Hunter's verifier specifically when you trust Hunter.io's data quality for B2B email domains.

## Known failure modes

- Invalid or malformed email input returns an error
- Email domain does not exist or is unreachable, resulting in unverifiable status
- Payment failure or insufficient USDC balance prevents call completion
- Rate limiting or service unavailability from underlying Hunter.io API
- Catch-all domains may return inconclusive verification results

## How this service works

Locus public pay-per-use API

## Output

Returns a JSON object with verification data about the submitted email address, including deliverability status and validity signals, along with payment settlement details showing the USDC amount charged and a request ID for tracking.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "payment": {
   "scheme": "exact",
   "settledUsdc": "0.001000",
   "authorizedMaxUsdc": "0.001000"
  },
  "request": {
   "id": "00000000-0000-4000-8000-000000000000",
   "statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
  },
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hunter-email-verifier-via-locus-x402-545b7320/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hunter.x402.paywithlocus.com](https://www.zero.xyz/host/hunter.x402.paywithlocus.com/llms.txt)