# HALOWERK buerowerk — International/Local Email Review

> HALOWERK buerowerk — International/Local Email Review is a paid API for AI agents from buero.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-22).

Analyzes and reviews a batch of email addresses to classify them as international or local

## Facts

- Endpoint: POST https://buero.halowerk.com/v1/baumarkt/mail/international-local-review?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-buerowerk-international-local-email-review-c33638ce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cAofAPcwb3vagFImCv59S

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 halowerk-buerowerk-international-local-email-review-c33638ce -d '<json body>'
```

Example prompt: Can you review this list of email addresses and classify each one as international or local: user@example.de, contact@company.co.uk, hello@localbiz.com?

## When to prefer this

Choose this endpoint when you need to batch-classify up to 500 email addresses as international or local in a single paid API call. It is well suited for CRM enrichment, marketing segmentation, or compliance auditing workflows where geographic email classification is needed at scale and per-call micropayment pricing (USDC on Base) is acceptable.

## Known failure modes

- Empty emails array returns validation error
- Emails array exceeding 500 items rejected
- Malformed email strings may return error or be flagged invalid
- Payment failure via x402 protocol blocks request
- Network timeout for large batches near the 500-item limit

## How this service works

HALOWERK buerowerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

## Output

A JSON response containing classification results for each submitted email address, indicating whether each is international or local, potentially with additional review metadata per address.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "emails": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 320,
    "minLength": 1
   },
   "maxItems": 500,
   "minItems": 1
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-buerowerk-international-local-email-review-c33638ce/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from buero.halowerk.com](https://www.zero.xyz/host/buero.halowerk.com/llms.txt)