# WebsterBerry Synaptic Email/Domain Validator

> WebsterBerry Synaptic Email/Domain Validator is a paid API for AI agents from synaptic.websterberrymarketing.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-21).

Validates an email address or domain for outreach readiness by checking syntax, MX records, SPF/DMARC configuration, disposable/role-based detection, free-mail flag, and domain age.

## Facts

- Endpoint: GET https://synaptic.websterberrymarketing.com/agents/06-email-domain-validator?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/websterberry-synaptic-email-domain-validator-68096d4b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XMr49C9Z-NqFju1M6p9w5

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 websterberry-synaptic-email-domain-validator-68096d4b
```

Example prompt: Before I add john.smith@acmecorp.io to my outreach list, can you validate that email — check the syntax, MX records, SPF and DMARC setup, and whether it's disposable or role-based?

## When to prefer this

Choose this endpoint when you need a comprehensive pre-outreach email hygiene check that combines syntax validation, DNS/MX record lookup, email authentication policy checks (SPF/DMARC), and deliverability signals (disposable, role-based, free-mail, domain age) in a single call. It is especially useful for B2B sales and marketing workflows where deliverability and sender reputation matter. Prefer it over basic syntax validators when you need DNS-level and policy-level signals, and over generic WHOIS lookups when email-specific deliverability context is required.

## Known failure modes

- Neither email nor domain query parameter provided — returns error
- Invalid or malformed email syntax passed — may return syntax failure with no DNS checks
- Domain does not exist or has no DNS records — MX/SPF/DMARC checks return negative
- Rate limiting or upstream DNS lookup timeout — transient failure
- Private or reserved domain names may produce incomplete results

## How this service works

Validate an email address or domain before outreach: syntax, MX records, SPF and DMARC, disposable and role-based detection, free-mail flag and domain age.

## Output

Returns a structured report on the email or domain including: syntax validity, MX record presence and details, SPF and DMARC record status, whether the address is from a disposable/temporary provider, whether it is a role-based address (e.g. info@, admin@), whether the domain is a known free-mail provider, and the age of the domain.

## 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",
     "properties": {
      "email": {
       "type": "string",
       "description": "Email address to check"
      },
      "domain": {
       "type": "string",
       "description": "Domain to check (alternative to email)"
      }
     }
    }
   },
   "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/websterberry-synaptic-email-domain-validator-68096d4b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synaptic.websterberrymarketing.com](https://www.zero.xyz/host/synaptic.websterberrymarketing.com/llms.txt)