# HALOWERK medienwerk – Baumarkt Sales/Procurement Literal Index Snapshot Compare

> HALOWERK medienwerk – Baumarkt Sales/Procurement Literal Index Snapshot Compare is a paid API for AI agents from medien.halowerk.com, paid per call via x402, $0.031/call, status unknown (last checked 2026-10-14).

Compares two timestamped snapshots of a literal-vocabulary sales and procurement index for the German home improvement (Baumarkt) sector, returning differences in source coverage or term occurrence.

## Facts

- Endpoint: POST https://medien.halowerk.com/v1/baumarkt/media/sales-procurement-literal-index/snapshot-compare?utm_source=zero.xyz
- Price: $0.031/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-medienwerk-baumarkt-sales-procurement-literal-index-snapshot-a6dbcc9d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F5cxlSANfD4CAWMhnt261

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-medienwerk-baumarkt-sales-procurement-literal-index-snapshot-a6dbcc9d -d '<json body>'
```

Example prompt: Compare the Baumarkt sales procurement literal index between last week's snapshot and today's snapshot — I want to see which procurement terms appeared, disappeared, or shifted across the indexed sources.

## When to prefer this

Choose this endpoint when you need to compare two specific points in time within the HALOWERK Baumarkt procurement literal index, particularly when tracking vocabulary drift or source coverage changes in German home improvement media. Prefer it over the single-snapshot endpoint when temporal change detection is the goal.

## Known failure modes

- Invalid or out-of-range snapshot timestamps return an error
- Snapshot not found for requested date returns 404-equivalent response
- Caller ID missing or rate-limited returns 402/403 response
- Malformed literal query vocabulary causes parsing error
- No diff found between snapshots returns empty delta result

## How this service works

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

## Output

A JSON object containing the diff between two timestamped snapshots of the Baumarkt sales/procurement literal vocabulary index, including which terms appeared or disappeared, source coverage changes, and metadata about the comparison window.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-medienwerk-baumarkt-sales-procurement-literal-index-snapshot-a6dbcc9d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from medien.halowerk.com](https://www.zero.xyz/host/medien.halowerk.com/llms.txt)