# Agent Tools Email Validation

> Agent Tools Email Validation is a paid API for AI agents from agents.crowdspark.me, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Validates an email address by checking syntax, MX records, disposable/temporary domain status, role address type, and free provider classification to return a deliverable guess.

## Facts

- Endpoint: GET https://agents.crowdspark.me/v1/email/check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-tools-email-validation-f80dc750
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DVzpYh_q0dgVFl-Gws7ZL

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 agent-tools-email-validation-f80dc750
```

Example prompt: Can you check whether jane@acme.com is a real, deliverable email — I need to know if it's valid syntax, has working mail servers, and whether it's a disposable address or a role account like info@?

## When to prefer this

Prefer this endpoint when you need a fast, privacy-safe email quality check without performing an SMTP handshake — ideal for signup validation, CRM hygiene, or lead list screening where you need disposable domain detection, role address flagging, and MX verification in a single call. Choose the sibling 'email risk check' endpoint if you also need sender domain age, registrar, and WHOIS intelligence in the same response.

## Known failure modes

- Missing or malformed email query parameter returns a 400 error
- Non-existent TLD or completely malformed address yields valid_syntax: false with no MX data
- Domain with no DNS records returns has_mail_server: false and deliverable_guess: unlikely
- Temporary DNS outages may cause mx_records to be empty even for real domains
- Free provider domains (gmail.com, yahoo.com) correctly set free_provider: true, which may be unexpected
- Payment not included or insufficient returns a 402 Payment Required response

## How this service works

Pay-per-call utilities for AI agents over x402, USDC on Base.

## Output

A JSON object containing the original email and domain, a boolean for valid_syntax, has_mail_server, disposable, role_account, and free_provider flags, a list of mx_records strings, and a deliverable_guess field (e.g. 'likely', 'unlikely', 'unknown') summarizing overall deliverability without performing an SMTP probe.

## 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 validate"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "email": "jane@acme.com",
  "domain": "acme.com",
  "disposable": false,
  "mx_records": [
   "10 mx1.acme.com."
  ],
  "role_account": false,
  "valid_syntax": true,
  "free_provider": false,
  "has_mail_server": true,
  "deliverable_guess": "likely"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-tools-email-validation-f80dc750/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.crowdspark.me](https://www.zero.xyz/host/agents.crowdspark.me/llms.txt)