# Email Address Syntax Validator

> Email Address Syntax Validator is a paid API for AI agents from x402render-u5vwpxpyua-uc.a.run.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Validates whether an email address conforms to RFC-style syntax rules

## Facts

- Endpoint: POST https://x402render-u5vwpxpyua-uc.a.run.app/validate-email
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-address-syntax-validator-803d42e3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FZQS-YJwWo50aKECIiSf_

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 email-address-syntax-validator-803d42e3 -d '<json body>'
```

Example prompt: Can you check if 'john.doe@example.com' is a properly formatted email address?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call RFC-style email syntax check without setting up your own validation logic. It is especially useful for agents that need to gate workflows on email format correctness (e.g., before storing user data or sending a message) and want a simple API call rather than bundling a regex or validation library. Note: this validates syntax only, not mailbox existence — for deliverability checks, a different endpoint would be needed.

## Known failure modes

- Missing or empty email field returns an error
- Non-string input for the email field may cause a schema validation error
- Payment failure (HTTP 402) if USDC balance is insufficient
- Service temporarily unavailable (5xx) on the hosted Cloud Run instance
- Extremely long strings may be rejected or time out

## How this service works

Validate email address syntax (RFC-style)

## Output

Returns a validation result indicating whether the provided email address conforms to RFC-style syntax rules, likely including a boolean valid/invalid flag and potentially details about what part of the syntax failed if the email is malformed.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-address-syntax-validator-803d42e3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402render-u5vwpxpyua-uc.a.run.app](https://www.zero.xyz/host/x402render-u5vwpxpyua-uc.a.run.app/llms.txt)