# Email Validation API

> Email Validation API is a paid API for AI agents from dominion-data.x402-evm-math.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).

Validates an email address by checking syntax, MX records, SPF/DMARC, disposable domains, and role addresses, returning a deliverability verdict without sending any mail.

## Facts

- Endpoint: GET https://dominion-data.x402-evm-math.workers.dev/email?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-validation-api-cf35b057
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W2xXGlnniUrI9OIIOwgJW

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-validation-api-cf35b057
```

Example prompt: Can you check whether john.doe@example.com is a real, deliverable email address — look at its syntax, MX records, SPF/DMARC, and whether it's a disposable or role address?

## When to prefer this

Choose this endpoint when you need a lightweight, no-send email validation that checks beyond simple syntax — specifically when MX record lookup, SPF/DMARC verification, disposable domain detection, and role-address flagging are all required in a single call. Ideal for pre-campaign scrubbing, sign-up fraud prevention, or CRM data hygiene where you cannot or should not send a verification email. Priced per-call at $0.005 USDC, making it cost-effective for moderate volumes via the x402 payment protocol.

## Known failure modes

- Missing or malformed email address input returns a validation error
- Domain has no MX records — verdict returns as undeliverable
- Network timeout when looking up DNS records for obscure domains
- Rate limiting or payment failure when USDC balance is insufficient
- Newly registered domains may not yet have propagated MX/SPF records, causing false negatives

## How this service works

Email validation API: verify an email address with syntax check, MX record lookup, SPF/DMARC, disposable and role address detection. Returns a deliverability verdict. No mail sent.

## Output

Returns a structured deliverability verdict including: syntax validity, MX record existence and reachability, SPF/DMARC policy findings, whether the domain is a known disposable/temporary email provider, and whether the address is a role-based address (e.g. info@, support@). No actual email is sent during validation.

## 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": {}
    }
   },
   "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-validation-api-cf35b057/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dominion-data.x402-evm-math.workers.dev](https://www.zero.xyz/host/dominion-data.x402-evm-math.workers.dev/llms.txt)