# Delx Email Syntax Check

> Delx Email Syntax Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Validates the syntax of an email address and parses it into its local and domain components

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/email-syntax-check
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-email-syntax-check-09c2709a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LNQQkvBQ-knTb2X6OZ049

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 delx-email-syntax-check-09c2709a -d '<json body>'
```

Example prompt: Can you check whether 'john.doe@example.com' is a valid email address and tell me the local part and domain?

## When to prefer this

Use this endpoint when you need a fast, cheap, deterministic syntax check on an email address — especially before persisting to a database, sending via SMTP, or passing to downstream services. It does not perform DNS or SMTP verification; choose it when structural validation is sufficient and you want the local/domain split as a bonus. At $0.001 per call it is cost-effective for high-volume form validation pipelines.

## Known failure modes

- Missing or empty email field returns a validation error
- Malformed input type (non-string) may return a 400-style error
- Email with no @ symbol returns ok: false
- Completely empty string input likely returns ok: false
- Network timeout or service unavailability returns a 5xx error

## How this service works

Validate basic email syntax and split local/domain. Call when preflight before MX/DNS steps. Returns ok, local, domain as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

## Output

Returns a JSON object with an 'ok' boolean indicating whether the email is syntactically valid, the 'local' part (before the @), the 'domain' part (after the @), and a schema identifier string. No external lookup or deliverability check is performed — purely structural validation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to validate"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "local": "user",
  "domain": "example.com",
  "schema": "delx/util-email-syntax-check/v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-email-syntax-check-09c2709a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)