# Straelo Relay Email Validator (Basic)

> Straelo Relay Email Validator (Basic) is a paid API for AI agents from relay.straelo.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Validates an email address for syntax correctness, domain existence, and MX record presence

## Facts

- Endpoint: POST https://relay.straelo.com/email-validator/basic?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/straelo-relay-email-validator-basic-8e761a18
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tKuFdoXwB-U_B2sMy6mcc

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 straelo-relay-email-validator-basic-8e761a18 -d '<json body>'
```

Example prompt: Can you check whether john.doe@acmecorp.io is a real, deliverable email address — specifically whether it has valid syntax and an active mail server?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-use email check that covers syntax, domain existence, and MX record validation in a single call without managing your own DNS resolution infrastructure. Ideal for agent workflows that need to gate on email validity before sending messages, storing contacts, or processing registrations. Not suited for deep mailbox-level verification (SMTP handshake) or bulk batch validation of large lists.

## Known failure modes

- Malformed or missing email input returns a validation error
- Transient DNS lookup failures may cause MX check to report false negatives
- Newly registered domains may not yet have propagated MX records, causing false invalids
- Disposable or catch-all domains may appear valid even if mailbox does not exist
- Network timeouts on relay.straelo.com return HTTP 5xx errors

## How this service works

Validate email syntax, domain and MX records for basic automated checks without SMTP mailbox verification.

## Output

Returns a JSON object indicating whether the email is valid overall (boolean), the parsed domain, whether MX records were found (boolean), and an array of reasons explaining any failures or issues detected.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "format": "email",
   "description": "Email address for syntax, domain and MX validation."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid": true,
  "domain": "example.com",
  "reasons": [],
  "mx_found": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/straelo-relay-email-validator-basic-8e761a18/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from relay.straelo.com](https://www.zero.xyz/host/relay.straelo.com/llms.txt)