# Netzhandwerker Email Validate

> Netzhandwerker Email Validate is a paid API for AI agents from tools.netzhandwerker.de, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Validates one or a batch of up to 50 email addresses, with optional SMTP-level deliverability checking

## Facts

- Endpoint: POST https://tools.netzhandwerker.de/v1/email/validate
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netzhandwerker-email-validate-c5ceda39
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_92ziqrntNVSBogctGAx9Z

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 netzhandwerker-email-validate-c5ceda39 -d '<json body>'
```

Example prompt: Can you validate whether 'john.doe@example.com' is a real, deliverable email address — run the SMTP check too so we know if the mailbox actually exists?

## When to prefer this

Choose this endpoint when you need fast, low-cost email validation with optional SMTP-level deliverability checking, especially for batch processing up to 50 addresses in a single $0.001 call. Prefer it over basic regex-only validators when you need to confirm a mailbox actually exists, and over heavyweight email verification SaaS platforms when cost-per-check and per-call x402 micropayment compatibility matter.

## Known failure modes

- Invalid JSON body or missing both 'email' and 'emails' fields — returns 400 Bad Request
- Batch exceeds 50 addresses — may return error or truncate
- SMTP check times out for slow or unresponsive mail servers — may return inconclusive result
- Payment not attached or insufficient — returns 402 Payment Required
- Network/DNS lookup failure for domain — returns error for that address
- Temporary SMTP greylisting may cause false negatives on deliverability

## How this service works

x402-Werkzeuge für autonome Agenten.

## Output

Returns validation results for one or up to 50 email addresses, including syntax validity, domain/MX record checks, and optionally SMTP-level deliverability status indicating whether the mailbox actually exists and accepts mail.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string"
  },
  "emails": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "description": "Stapel bis 50 Adressen, ein Preis pro Aufruf"
  },
  "smtp_check": {
   "type": "boolean",
   "default": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "results": [
   {
    "email": "info@example.com",
    "score": 40,
    "domain": "example.com",
    "verdict": "risky",
    "mx_found": false,
    "disposable": false,
    "role_account": true,
    "valid_syntax": true,
    "free_provider": false
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netzhandwerker-email-validate-c5ceda39/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tools.netzhandwerker.de](https://www.zero.xyz/host/tools.netzhandwerker.de/llms.txt)