# Email Domain DNS & Deliverability Validator

> Email Domain DNS & Deliverability Validator is a paid API for AI agents from webtools402.176-109-107-191.sslip.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Validates and classifies an email domain via public DNS: checks MX records, mail provider, SPF/DMARC policies, and flags disposable/free-webmail/role-account addresses with a deliverability signal.

## Facts

- Endpoint: GET https://webtools402.176-109-107-191.sslip.io/enrich/email
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-domain-dns-deliverability-validator-26cb57c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ogShblgh_qJ31mjZ8VTOd

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-domain-dns-deliverability-validator-26cb57c5
```

Example prompt: Can you check the email domain for john@tempmail.io — I want to know if it's a disposable address, whether SPF and DMARC are properly configured, and what mail provider is behind it?

## When to prefer this

Use this endpoint when you need to validate or classify an email domain at the DNS layer without probing individual mailboxes — ideal for pre-send list hygiene, signup form validation, spam/disposable detection, or checking email authentication policy (SPF/DMARC). Prefer over full SMTP-probe services when privacy compliance and Terms-of-Service adherence are priorities.

## Known failure modes

- Domain has no MX records — deliverability signal will be negative or unknown
- DNS lookup timeout or NXDOMAIN for non-existent domains
- SPF or DMARC records absent — flags returned as missing/none
- Invalid email or domain format in query parameter — likely 400 error
- Payment not provided or insufficient — 402 payment required

## How this service works

Validate and classify an email DOMAIN from public DNS: MX hosts + mail-provider, SPF and DMARC policy, plus disposable / free-webmail / role-account flags and a deliverability signal. No SMTP probing of individual mailboxes (privacy + ToS).

## Output

Returns MX hosts and identified mail provider, SPF and DMARC policy details, boolean flags for disposable/free-webmail/role-account classification, and an overall deliverability signal for the domain — all sourced from public DNS without any SMTP mailbox probing.

## 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": [],
     "properties": {
      "email": {
       "type": "string",
       "description": "Email address (its domain is checked)"
      },
      "domain": {
       "type": "string",
       "description": "Alternative input: the email domain directly"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-domain-dns-deliverability-validator-26cb57c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from webtools402.176-109-107-191.sslip.io](https://www.zero.xyz/host/webtools402.176-109-107-191.sslip.io/llms.txt)