# Quant Agent Shop Email Check

> Quant Agent Shop Email Check is a paid API for AI agents from quantagentshop.com, paid per call via x402, $0.0013/call, status unknown (last checked 2026-10-23).

Validates an email address for syntax, domain mail acceptance, disposability, role-account status, and free-webmail classification without sending any email

## Facts

- Endpoint: POST https://quantagentshop.com/v1/email-check?utm_source=zero.xyz
- Price: $0.0013/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quant-agent-shop-email-check-d2d8f543
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JROBt7gtapvHHxMpf166k

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 quant-agent-shop-email-check-d2d8f543 -d '<json body>'
```

Example prompt: Can you check whether 'info@tempmail.org' is a real, usable email address — specifically if the domain accepts mail, whether it's disposable or a role address, and give me an overall verdict?

## When to prefer this

Choose this endpoint when you need a fast, lightweight email address sanity-check that covers syntax, domain acceptance, and quality signals (disposable, role, webmail) without triggering any actual email send. Prefer it over full email verification services when you do not need mailbox-level confirmation and want sub-second latency at low cost. Ideal for pre-filtering form submissions, validating CRM imports, or enriching contact records without risking deliverability issues.

## Known failure modes

- Malformed or missing email field returns a validation error
- Email longer than 254 characters or shorter than 3 characters rejected by schema
- Network timeout when checking domain MX records may cause delayed or failed response
- Newly created domains may not yet have propagated MX records, causing false negatives on domain acceptance
- Disposable provider lists may not include very new throwaway services, causing false negatives

## How this service works

Email address check without sending mail. Returns syntax validity, the normalised address, whether the domain accepts mail (MX, null MX or address fallback), and flags for disposable, role (info@, support@) and free webmail addresses, with a verdict. Use to validate an address someone gave you. Does not confirm the mailbox exists. Typical response under 1 s. Failed calls are not charged.

## Output

Returns whether the email address has valid syntax, its normalized form, whether the domain accepts mail (via MX record, null MX, or address fallback), boolean flags for disposable/temporary service, role-based address (e.g. info@, support@), and free webmail provider, plus a final verdict summarizing the overall assessment.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "email"
     ],
     "properties": {
      "email": {
       "type": "string",
       "title": "Email",
       "maxLength": 254,
       "minLength": 3,
       "description": "One email address."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "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/quant-agent-shop-email-check-d2d8f543/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quantagentshop.com](https://www.zero.xyz/host/quantagentshop.com/llms.txt)