# Basalt Email Check

> Basalt Email Check is a paid API for AI agents from basalt-n6lt.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Validates an email address by checking syntax, MX records, and deliverability via DNS lookup

## Facts

- Endpoint: POST https://basalt-n6lt.onrender.com/email-check
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basalt-email-check-1f8ff514
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TZVtm9oubwMynV0ir7wgN

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 basalt-email-check-1f8ff514 -d '<json body>'
```

Example prompt: Can you check if hello@example.com is a real, deliverable email address — verify its syntax, MX records, and whether it can actually receive mail?

## When to prefer this

Use this endpoint when you need a lightweight, pay-per-call email validation that combines syntax checking with live DNS/MX record lookup to assess deliverability — ideal for agent workflows that process individual email addresses on-demand without committing to a subscription-based email verification service.

## Known failure modes

- Invalid email format returns validSyntax: false with deliverable: false
- Domain with no MX records returns hasMxRecords: false and deliverable: false
- Network or DNS timeout may cause lookup failures
- Payment failure via x402 results in 402 response before processing
- Temporary DNS unavailability may yield inaccurate results for valid domains

## How this service works

Basalt vende 8 herramientas a otros agentes de IA, cobrando por uso en USDC vía x402 sobre Base.

## Output

Returns a JSON object with the original email address, the extracted domain, a list of MX hosts found for the domain, and boolean flags for deliverable, validSyntax, and hasMxRecords.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "email": "hello@example.com",
  "domain": "example.com",
  "mxHosts": [
   "mail.example.com"
  ],
  "deliverable": true,
  "validSyntax": true,
  "hasMxRecords": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basalt-email-check-1f8ff514/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from basalt-n6lt.onrender.com](https://www.zero.xyz/host/basalt-n6lt.onrender.com/llms.txt)