# HALOWERK buerowerk — Baumarkt Removed CSV Export

> HALOWERK buerowerk — Baumarkt Removed CSV Export 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).

Accepts a list of email addresses and exports a CSV of contacts removed from a hardware-store (Baumarkt) mailing list

## Facts

- Endpoint: POST https://buero.halowerk.com/v1/baumarkt/mail/removed-csv-export?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-baumarkt-removed-csv-export-f78af673
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Bnrbn5syndTohR_c6MVPX

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-baumarkt-removed-csv-export-f78af673 -d '<json body>'
```

Example prompt: I need to export a CSV of the removed or unsubscribed contacts from our Baumarkt mailing list — here are up to 500 email addresses to check: [list of emails].

## When to prefer this

Use this endpoint when you need a programmatic, paid-per-call export of removed or unsubscribed email contacts from a Baumarkt (hardware store) mailing list managed by HALOWERK, especially when processing batches of up to 500 emails at a time via the x402 micropayment protocol on Base Mainnet.

## Known failure modes

- Empty or malformed email array returns validation error
- More than 500 emails in the array exceeds the maxItems limit and returns a 400 error
- Individual email strings exceeding 320 characters are rejected
- Payment not fulfilled via x402 protocol results in 402 Payment Required
- Malformed email strings may be silently ignored or cause partial results

## How this service works

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

## Output

A JSON response containing a CSV-formatted export identifying which of the submitted email addresses have been removed from the Baumarkt mailing list, suitable for list hygiene, compliance, or CRM cleanup purposes.

## 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-baumarkt-removed-csv-export-f78af673/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)