# Qonoro Email Validation

> Qonoro Email Validation is a paid API for AI agents from api.qonoro.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Validates email deliverability via syntax check, MX record lookup, and SMTP reachability, returning a risk score and quality rating.

## Facts

- Endpoint: POST https://api.qonoro.ai/v1/email/validate
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/qonoro-email-validation-d9b22bb4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U1YwkLk9dhiDX_VSTavVS

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 qonoro-email-validation-d9b22bb4 -d '<json body>'
```

Example prompt: Can you check if john.doe@acmecorp.com is a real, deliverable email address — I want to know if it'll actually reach someone before I send anything to it?

## When to prefer this

Choose this endpoint when you need fast, multi-layer email validation that goes beyond syntax checking — specifically when you need to confirm MX record existence and SMTP server reachability to predict deliverability and get a risk score. Ideal for pre-campaign list hygiene, CRM intake filtering, and fraud screening on sign-up flows where accuracy and sub-second latency both matter.

## Known failure modes

- Malformed email input returns a syntax error without performing further checks
- Unreachable or non-existent domain results in MX lookup failure
- SMTP server behind a catch-all configuration may report reachable even for invalid mailboxes
- Rate limiting or payment failure (x402) may block the request
- Network timeouts on SMTP probe may return inconclusive reachability status

## How this service works

Validates email deliverability: syntax check, MX record lookup, and SMTP server reachability. Returns risk score and quality rating. Deterministic, sub-second. x402-native.

## Output

Returns a risk score (numeric), a quality rating (e.g. high/medium/low/invalid), syntax validity flag, MX record lookup result, and SMTP server reachability status for the provided email address. Response is sub-second and deterministic.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to validate (e.g. 'contact@stripe.com')."
  },
  "buyer_region": {
   "type": "string",
   "description": "Optional privacy-safe buyer region for operational reporting."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/qonoro-email-validation-d9b22bb4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.qonoro.ai](https://www.zero.xyz/host/api.qonoro.ai/llms.txt)