# Cheap Utilities Email Syntax Validator

> Cheap Utilities Email Syntax Validator is a paid API for AI agents from cheap-utilities.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).

Validates email address syntax, detects role accounts (info@, admin@), and identifies known throwaway/disposable domains — no DNS lookup or message sending involved.

## Facts

- Endpoint: GET https://cheap-utilities.x402tookit.com/email-syntax?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cheap-utilities-email-syntax-validator-5be635ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wU5GEhlzCqcPdgvmSBOXn

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 cheap-utilities-email-syntax-validator-5be635ab
```

Example prompt: Check whether 'info@mailinator.com' is a valid email — tell me if it's a role account or a disposable throwaway domain, and give me a plain-English verdict.

## When to prefer this

Choose this endpoint when you need a fast, privacy-safe, offline-style email check that covers syntax correctness, role account detection, and disposable domain flagging without triggering DNS queries or sending any messages. Ideal for pre-filtering form submissions, lead lists, or user registrations where MX validation is unnecessary or undesirable. Prefer alternatives if you need full deliverability verification including DNS/MX record checks.

## Known failure modes

- Missing email query parameter returns an error
- Malformed query string may yield a parse error
- Service unavailability returns an HTTP 5xx
- Disposable domain list may not include very new or obscure providers, causing false negatives
- Only syntax and list-based checks are performed — DNS/MX validity is explicitly not checked

## How this service works

Check email address syntax, role accounts (info@, admin@) and known throwaway domains. No DNS lookup, nothing sent.

## Output

Returns a JSON object with: a verdict (e.g. 'invalid', 'risky', 'ok'), a normalized form of the email, the local part and domain split out, boolean flags for roleAccount and disposableDomain, an array of reasons explaining the verdict, a human-readable summary, an asOf timestamp, a source label, a degraded flag indicating whether the check ran at full capacity, a notChecked array listing skipped checks, and a disclaimer.

## 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",
     "required": [
      "email"
     ],
     "properties": {
      "email": {
       "type": "string",
       "description": "Email address to check"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "local": {
       "type": [
        "null",
        "string"
       ]
      },
      "domain": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "normalized": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "roleAccount": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "disposableDomain": {
       "type": [
        "boolean",
        "null"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cheap-utilities-email-syntax-validator-5be635ab/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cheap-utilities.x402tookit.com](https://www.zero.xyz/host/cheap-utilities.x402tookit.com/llms.txt)