# Email Validation & Verification API

> Email Validation & Verification API is a paid API for AI agents from companyfacts.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Validates an email address by checking mail server existence, disposable address status, and whether it is a role account

## Facts

- Endpoint: GET https://companyfacts.dev/x402/v1/email-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-validation-verification-api-297978b9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XmE5m9M45VF_Cx7vUxZEF

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-validation-verification-api-297978b9
```

Example prompt: Can you check whether jane@example.com is a real, non-disposable email address that actually has a mail server behind it, and tell me if it's a role account?

## When to prefer this

Choose this endpoint when you need real-time, lightweight email hygiene checks — specifically to detect disposable addresses and role accounts — without storing any personal data. It is best suited for pre-submission validation in sign-up flows, lead qualification pipelines, or mailing list imports where bounce reduction and spam prevention matter. Prefer it over full email deliverability services when you need a fast, low-cost per-query signal rather than bulk list scrubbing.

## Known failure modes

- Missing or malformed email query parameter returns an error
- Unresolvable or non-existent domain may return a verdict indicating no mail server found
- Ambiguous or partial email strings may fail schema validation
- Network timeouts contacting upstream DNS/MX record lookups could delay or fail response
- Rate limits may apply if many checks are issued in rapid succession

## How this service works

Open job postings read first-hand from the applicant-tracking system behind a company's careers page: Greenhouse, Ashby, Lever or Workable. Includes a directory of 8532 company job boards, because none of the vendors publishes one. Salaries are parsed into numbers where the employer publishes them and refused where ambiguous. No personal data.

## Output

Returns a JSON object with the submitted email address, a verdict string (e.g. 'mail_server_found'), a boolean indicating whether the address is from a disposable provider, and a boolean indicating whether it is a role account (e.g. info@, support@, admin@).

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "email"
     ],
     "properties": {
      "email": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "email": "jane@example.com",
  "verdict": "mail_server_found",
  "disposable": false,
  "role_account": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-validation-verification-api-297978b9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from companyfacts.dev](https://www.zero.xyz/host/companyfacts.dev/llms.txt)