# NetIntel Lead Email Verifier

> NetIntel Lead Email Verifier is a paid API for AI agents from netintel.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-27).

Validates a sales lead email address and its company domain's email hygiene (SPF/DKIM/DMARC, domain age) via DNS checks, returning a yes/risky/no verdict with machine-readable reasons.

## Facts

- Endpoint: GET https://netintel.dev/lead/check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netintel-lead-email-verifier-f161e110
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dnYaOvTHo5nM_QbJTGd0l

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 netintel-lead-email-verifier-f161e110
```

Example prompt: Before I reach out to jane.doe@stripe.com, can you check whether that email is legit — verify the format, see if it has working MX records, and tell me if Stripe's domain has proper SPF, DKIM, and DMARC set up, along with a yes/risky/no verdict?

## When to prefer this

Choose this endpoint when you need a fast, DNS-level lead qualification signal before cold outreach or CRM import — it combines email syntax, MX reachability, disposable/role/free-provider detection, and company domain email-security posture (SPF/DKIM/DMARC) and domain age in a single call. Prefer it over generic email-validation APIs when you care about B2B lead quality and want to avoid emailing role addresses, burner accounts, or domains with poor email hygiene. Not suitable if you need SMTP-level mailbox existence confirmation (it explicitly skips SMTP probing).

## Known failure modes

- Invalid email format returns verdict 'no' with reason code invalid_format
- Domain with no MX records returns reason no_mail_server
- Disposable/throwaway address returns reason disposable_address and verdict 'no' or 'risky'
- Role-based address (e.g. info@, support@) returns reason role_address
- Very new domain returns reason new_domain with risky verdict
- Domain that does not resolve returns reason domain_not_resolving
- Missing SPF/DKIM/DMARC returns reason no_email_authentication with lower grade
- Free personal mailbox (gmail, yahoo) returns null company section; company checks skipped
- Partial results may be returned if some DNS lookups time out (partial: true)
- Payment failure or missing x402 payment header returns HTTP 402

## How this service works

Check a sales lead before outreach — one call verifies the email address (syntax, MX, disposable/role/free-provider), the company's email setup (SPF/DKIM/DMARC) and its domain age, and returns a verdict: yes, risky or no, with machine-readable reasons. Free personal mailboxes skip the company checks. DNS-level only — no SMTP mailbox probe.

## Output

Returns a JSON object with: the normalized email, an address object (format_valid, mx_found, mx_records list, disposable, role_based, free_provider, business_email), a company object with domain age (age_days, maturity, created_at) and email_setup (spf, dkim, dmarc, dmarc_policy, grade, resolves) — null for free personal mailboxes, a boolean partial flag, an array of reason objects with code and detail, a top-level verdict string (yes | risky | no), and a safe_to_email boolean.

## 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": [
      "email"
     ],
     "properties": {
      "email": {
       "type": "string",
       "description": "The lead's email address, 3-320 chars. Aliases: address, email_address, emailAddress, lead, e, q, to"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "email": {
       "type": "string"
      },
      "address": {
       "type": "object"
      },
      "company": {
       "type": "object",
       "description": "null for free personal mailboxes; sections may be {error}"
      },
      "partial": {
       "type": "boolean"
      },
      "reasons": {
       "type": "array",
       "items": {
        "type": "object"
       },
       "description": "{code, detail}; codes: ok, invalid_format, no_mail_server, disposable_address, domain_not_resolving, role_address, personal_address, new_domain, no_email_authentication"
      },
      "verdict": {
       "type": "string",
       "description": "yes | risky | no"
      },
      "safe_to_email": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "email": "jane.doe@stripe.com",
  "address": {
   "mx_found": true,
   "disposable": false,
   "mx_records": [
    "aspmx.l.google.com",
    "alt1.aspmx.l.google.com"
   ],
   "role_based": false,
   "format_valid": true,
   "free_provider": false,
   "business_email": true
  },
  "company": {
   "domain": "stripe.com",
   "domain_age": {
    "source": "rdap",
    "age_days": 11358,
    "maturity": "established",
    "created_at": "1995-09-12T04:00:00Z"
   },
   "email_setup": {
    "spf": true,
    "dkim": true,
    "dmarc": true,
    "grade": "A",
    "resolves": true,
    "dmarc_policy": "reject"
   }
  },
  "partial": false,
  "reasons": [
   {
    "code": "ok",
    "detail": "address and company domain look legitimate"
   }
  ],
  "verdict": "yes",
  "smtp_checked": false,
  "safe_to_email": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-lead-email-verifier-f161e110/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel.dev](https://www.zero.xyz/host/netintel.dev/llms.txt)