# 24K Labs Email Validator

> 24K Labs Email Validator is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Validates an email address for RFC-5322 syntax correctness and flags it as disposable, role-account, or from a free email provider.

## Facts

- Endpoint: POST https://api.24klabs.ai/api/email-validate
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/24k-labs-email-validator-74451aed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_INCuECa9CzjQbOMT9RBay

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 24k-labs-email-validator-74451aed -d '<json body>'
```

Example prompt: Can you check whether 'john.doe@mailinator.com' is a valid email address, and tell me if it's disposable, a role account, or from a free email provider?

## When to prefer this

Use this endpoint when you need lightweight, fast email validation combined with disposable/role/free-provider classification in a single call — especially useful at user registration, lead qualification, or before sending transactional emails. Prefer it over pure syntax validators when you also need to flag low-quality or fraudulent email sources.

## Known failure modes

- Missing or malformed input email returns a validation error
- Network timeout if the service is temporarily unavailable
- Edge-case RFC-5322 syntax variants may be misclassified
- Free-provider or disposable domain lists may be outdated

## How this service works

RFC-5322-ish syntax check plus disposable / role-account / free-provider flags.

## Output

Returns a validation result indicating whether the email passes RFC-5322-ish syntax rules, plus boolean flags indicating whether the address is from a known disposable email service, is a role-based account (e.g. info@, admin@, support@), or belongs to a free email provider (e.g. Gmail, Yahoo).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/24k-labs-email-validator-74451aed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.24klabs.ai](https://www.zero.xyz/host/api.24klabs.ai/llms.txt)