# AssetFactory Email Verification

> AssetFactory Email Verification is a paid API for AI agents from assetfactory-jobs-x402.sigrunner.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-03).

Verifies email deliverability for up to 100 addresses at once, returning MX routing, SPF/DMARC posture, disposable/role/free-provider flags, typo suggestions, and an A–F grade — all via DoH, no SMTP probe.

## Facts

- Endpoint: GET https://assetfactory-jobs-x402.sigrunner.workers.dev/email/verify?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/assetfactory-email-verification-dcf7a8a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_McipPqfJRgk8ZO6yTJfCr

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 assetfactory-email-verification-dcf7a8a6
```

Example prompt: Can you verify whether jane@stripe.com and john@mailinator.com are actually deliverable — I need the MX routing, SPF/DMARC posture, and whether either is a disposable or role account, along with a deliverability grade for each?

## When to prefer this

Choose this endpoint when you need bulk email validation (up to 100 at once) without triggering SMTP probes — ideal for compliance-sensitive scenarios. It's distinctive for its loop-maintained disposable-domain corpus, typo suggestions, and combined SPF/DMARC sender-posture signals in a single call. Prefer it over SMTP-based verifiers when avoiding mailbox probing is required, or when you need structured deliverability grades alongside DNS-level sender reputation signals.

## Known failure modes

- Invalid or malformed email addresses return syntax errors in the record
- Domains with no public DNS records may return mx_found: false and undeliverable status
- Rate or batch limits exceeded if more than 100 emails submitted at once
- DoH resolution timeouts may cause delays or missing MX data for obscure domains
- Missing or misconfigured DMARC records cause dmarc_present: false without a hard failure

## How this service works

Email verification: one deliverability record per address — MX / implicit-MX routing (RFC 5321), SPF + DMARC posture, disposable / role / free-provider flags against a loop-maintained throwaway-domain corpus, a derived typo "did-you-mean" and an A-F grade. Keyless (DoH); no SMTP mailbox probe. Params: emails (max 100), checkSenderPosture.

## Output

Returns a JSON object with a count, aggregate stats (deliverable, undeliverable, risky, requested), and one record per email address. Each record includes: deliverability status, A–F grade, numeric score, MX found flag, SPF/DMARC presence and policy, disposable/role/free-provider boolean flags, email provider name, syntax validity, and a did-you-mean typo suggestion if applicable.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "emails"
     ],
     "properties": {
      "emails": {
       "type": "string",
       "description": "Comma-separated email addresses (up to 100). One deliverability record per address: MX/implicit-MX routing, SPF + DMARC posture, disposable / role / free-provider flags, a derived \"did-you-mean\" typo suggestion, and an A-F grade. Keyless (DoH) — no SMTP mailbox probe (reported honestly)."
      },
      "checkSenderPosture": {
       "type": "boolean",
       "default": true,
       "description": "Include SPF + DMARC presence/policy (spoofability signal)."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 1,
  "stats": {
   "risky": 0,
   "verified": 1,
   "requested": 1,
   "deliverable": 1,
   "undeliverable": 0
  },
  "records": [
   {
    "email": "jane@stripe.com",
    "grade": "A",
    "score": 100,
    "domain": "stripe.com",
    "reasons": [
     "clean"
    ],
    "mx_found": true,
    "deliverable": "deliverable",
    "spf_present": true,
    "did_you_mean": null,
    "dmarc_policy": "reject",
    "valid_syntax": true,
    "dmarc_present": true,
    "is_disposable": false,
    "email_provider": "Google Workspace",
    "is_role_account": false,
    "is_free_provider": false
   }
  ],
  "generated_at": "2026-10-30T00:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/assetfactory-email-verification-dcf7a8a6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from assetfactory-jobs-x402.sigrunner.workers.dev](https://www.zero.xyz/host/assetfactory-jobs-x402.sigrunner.workers.dev/llms.txt)