# Email Address Verification API

> Email Address Verification API is a paid API for AI agents from email-verification.api.klymax402.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Verifies whether a single email address is valid and deliverable

## Facts

- Endpoint: GET https://email-verification.api.klymax402.com/api/verify
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-verification-api-klymax402-com-bd45d4d5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Cc2d6O6cifLUTvWjzA4o8

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-verification-api-klymax402-com-bd45d4d5
```

Example prompt: Can you verify whether the email address john.doe@example.com is valid and actually deliverable before I send them an invite?

## When to prefer this

Use this endpoint when you need to validate a single email address before sending messages, registering a user, or adding to a list. Ideal for real-time form validation, lead enrichment, or pre-send checks where accuracy matters and you want to avoid bounces or invalid contacts.

## Known failure modes

- Missing or empty email parameter returns an error
- Malformed email address format may return invalid status or error
- Temporary DNS/SMTP lookup failures may cause inconclusive results
- Rate limiting or payment failure (402) if USDC balance is insufficient
- Disposable or catch-all domains may return ambiguous results

## How this service works

Verify a single email address

## Output

Returns a verification result indicating whether the provided email address is valid, exists, or is deliverable, potentially including status flags such as format validity, domain existence, and mailbox reachability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to verify (e.g. user@example.com)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-verification-api-klymax402-com-bd45d4d5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-verification.api.klymax402.com](https://www.zero.xyz/host/email-verification.api.klymax402.com/llms.txt)