# HALOWERK buerowerk — Email Potential Case Aliases

> HALOWERK buerowerk — Email Potential Case Aliases 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).

Given a list of email addresses, returns potential alternative alias addresses or case variants associated with each email.

## Facts

- Endpoint: POST https://buero.halowerk.com/v1/baumarkt/mail/potential-case-aliases?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-email-potential-case-aliases-03c7c6a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3HkL6aHhFnx_QqR6c6ku8

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-email-potential-case-aliases-03c7c6a7 -d '<json body>'
```

Example prompt: Can you find all the potential alias variations and case permutations for these email addresses: alice@example.com, Bob.Smith@company.org, and info@startup.io?

## When to prefer this

Use this endpoint when you need to enumerate possible alias or case-variant forms of email addresses in bulk (up to 500 at a time), particularly for deduplication, identity resolution, or fraud prevention workflows. It is distinct from simple email validation — it actively generates or resolves alias candidates.

## Known failure modes

- Empty or missing emails array returns a validation error
- More than 500 emails in the array exceeds the maxItems limit and is rejected
- Individual email strings exceeding 320 characters are rejected
- Malformed email strings may produce empty alias sets or errors
- Payment failure via x402 protocol returns HTTP 402

## How this service works

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

## Output

A JSON response listing, for each input email address, the potential case aliases or alternative address forms that could be associated with it, useful for deduplication, identity resolution, or fraud detection.

## 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-email-potential-case-aliases-03c7c6a7/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)