# vendsdk.com Email Validator

> vendsdk.com Email Validator is a paid API for AI agents from vendsdk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Validates an email address by checking format syntax, disposable-domain heuristics, and live DNS MX records via DNS-over-HTTPS

## Facts

- Endpoint: GET https://vendsdk.com/api/v/email-validate
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vendsdk-com-email-validator-c1490b60
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SCyAbIiPfjDOH7SZieAfp

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 vendsdk-com-email-validator-c1490b60
```

Example prompt: Can you validate the email address john.doe@acmecorp.com — check if the format is correct, whether the domain is disposable, and whether it has live MX records?

## When to prefer this

Choose this endpoint when you need a single-call email check that combines format validation, disposable-domain detection, and live DNS MX verification without managing separate DNS resolver libraries. Ideal for outreach, lead-gen, and signup-screening agents that need a quick deliverability signal before contacting or storing a lead. Prefer over pure regex checks when DNS reachability matters, and over full email verification services when you only need format + MX health at low cost per call.

## Known failure modes

- Missing or malformed email query parameter returns an error
- DNS-over-HTTPS lookup timeout if upstream DoH provider is slow or unreachable
- Domain with no MX records returns has_mx: false and empty mx array
- Transient network errors may cause intermittent DoH failures
- Very new domains may not yet have propagated MX records, causing false negatives

## How this service works

Validate email format, disposable-domain heuristics, and live DNS MX records via DoH for outreach and lead-gen agents

## Output

Returns a JSON object with: 'ok' (overall pass/fail boolean), 'email' (the input address), 'valid_format' (boolean for syntax check), 'has_mx' (boolean indicating live MX records found via DoH), 'mx' (array of MX record strings), and 'service' (label, e.g. identifying disposable providers).

## 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"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "email"
     ],
     "properties": {
      "email": {
       "type": "string",
       "description": "Email address to validate"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "mx": {
       "type": "array"
      },
      "ok": {
       "type": "boolean"
      },
      "email": {
       "type": "string"
      },
      "has_mx": {
       "type": "boolean"
      },
      "service": {
       "type": "string"
      },
      "valid_format": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vendsdk-com-email-validator-c1490b60/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vendsdk.com](https://www.zero.xyz/host/vendsdk.com/llms.txt)