# netintel Email Deliverability & Validation

> netintel Email Deliverability & Validation is a paid API for AI agents from netintel.x.c00l.site, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Analyzes an email address for deliverability, scoring it on MX records, SPF/DKIM/DMARC configuration, syntax validity, and risk classification (disposable, role account, free provider)

## Facts

- Endpoint: POST https://netintel.x.c00l.site/email
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netintel-email-deliverability-validation-49047e27
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EzDx1vAgl9RdQKSnEe_JG

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-email-deliverability-validation-49047e27 -d '<json body>'
```

Example prompt: Check the deliverability of user@example.com — I want to know its overall grade and score, whether MX records resolve, and if it looks like a disposable or role-based address.

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-signal email deliverability score in a single paid-per-call API with no account or API key required. It combines MX resolution, SPF/DKIM/DMARC authentication checks, disposable/role/free-provider classification, and a graded verdict in one response — making it ideal for agents doing real-time signup validation, pre-send list hygiene, or fraud detection without managing a subscription.

## Known failure modes

- Invalid or malformed email address returns a syntax error or low score with invalid syntax flag
- Domain has no MX records — mx.present will be false and resolves will be false
- DMARC/SPF/DKIM records absent — corresponding present fields will be false
- Payment failure via x402 if insufficient USDC balance
- Timeout or upstream DNS resolution failure for edge-case domains
- Disposable provider databases may lag new throwaway domains

## How this service works

Paid-per-call network intelligence API: DNS with DNSSEC, email deliverability, TLS certificate inspection, IP/ASN lookup and DNS propagation. From $0.002 a call over x402. No account, no API key.

## Output

Returns a JSON object with: overall deliverability grade (letter, e.g. C) and numeric score (0-100), a verdict string (e.g. 'moderate'), MX record list with resolve status, SPF lookup count and all-qualifier, DKIM found count, DMARC policy and enforcement percentage, syntax validity and parsed domain, classification flags (disposable, roleAccount, freeProvider), and a breakdown array explaining each score delta with a signal label and reason.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "mx": {
   "present": true,
   "records": [
    {
     "exchange": "mx.example.com",
     "priority": 10,
     "resolves": true
    }
   ]
  },
  "spf": {
   "present": true,
   "dnsLookups": {
    "exceedsLimit": false,
    "totalLookups": 4
   },
   "allQualifier": "-"
  },
  "dkim": {
   "foundCount": 1
  },
  "dmarc": {
   "policy": "reject",
   "percent": 100,
   "present": true
  },
  "grade": "C",
  "score": 62,
  "syntax": {
   "valid": true,
   "domain": "example.com"
  },
  "verdict": "moderate",
  "breakdown": [
   {
    "delta": -10,
    "reason": "…",
    "signal": "role-account"
   }
  ],
  "classification": {
   "disposable": false,
   "roleAccount": true,
   "freeProvider": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-email-deliverability-validation-49047e27/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel.x.c00l.site](https://www.zero.xyz/host/netintel.x.c00l.site/llms.txt)