# MailFerret Work Email Finder & Verifier

> MailFerret Work Email Finder & Verifier is a paid API for AI agents from mailferret.appin60.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Finds and verifies a person's work email address using live SMTP checks, returning a confirmed deliverable address or rejection, charged only on success.

## Facts

- Endpoint: POST https://mailferret.appin60.com/find?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mailferret-work-email-finder-verifier-d1bd1e4b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H8fWc3wCKSagyWTDgNEwz

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 mailferret-work-email-finder-verifier-d1bd1e4b -d '<json body>'
```

Example prompt: Can you find and verify the work email for Peer Richelsen at cal.com? His last name is Richelsen — I need a confirmed, deliverable address for outreach.

## When to prefer this

Choose MailFerret when you need a pay-per-success, no-API-key solution for finding and SMTP-verifying individual work emails in real time. It is ideal for agents doing cold outreach enrichment, CRM population, or recruiting contact discovery where you only want to pay when a verified address is actually returned. Prefer it over bulk email list services when operating on individual leads and requiring live deliverability confirmation rather than pattern guessing.

## Known failure modes

- Email not found: no accepted email candidate discovered for the given name and domain
- Domain catch-all: domain accepts all addresses, making SMTP verification unreliable
- Invalid domain: domain does not exist or has no MX records
- SMTP timeout: mail server unresponsive during live check
- Payment failure: x402 USDC payment not completed, no charge and no result returned
- Insufficient input: first name or domain missing causes request rejection

## How this service works

Find a person's verified work email from first name, last name and company domain. Live SMTP check against the company's mail server, catch-all detection. Charged only when a mailbox is verified; misses return 4xx and are not charged.

## Output

Returns a JSON object containing the verified email address, domain, SMTP verification status ('found' or not), a list of candidate emails checked with individual results ('accepted'/'rejected'), the email provider (e.g. google_workspace), MX records, whether the domain is catch-all, a confidence level ('high'/'medium'/'low'), and the verification method used (e.g. smtp_rcpt).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "first_name",
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "minLength": 3,
       "description": "Company domain or website, e.g. cal.com"
      },
      "last_name": {
       "type": "string",
       "description": "Person's last name, e.g. Richelsen (strongly recommended)"
      },
      "first_name": {
       "type": "string",
       "minLength": 1,
       "description": "Person's first name, e.g. Peer"
      },
      "middle_name": {
       "type": "string",
       "description": "Optional middle name"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "mx": [
   "aspmx.l.google.com"
  ],
  "email": "peer@cal.com",
  "domain": "cal.com",
  "status": "found",
  "checked": [
   {
    "email": "peer.richelsen@cal.com",
    "result": "rejected"
   },
   {
    "email": "peer@cal.com",
    "result": "accepted"
   }
  ],
  "provider": "google_workspace",
  "catch_all": false,
  "confidence": "high",
  "verified_by": "smtp_rcpt"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mailferret-work-email-finder-verifier-d1bd1e4b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mailferret.appin60.com](https://www.zero.xyz/host/mailferret.appin60.com/llms.txt)