# HALOWERK medienwerk Research Publication Literal Index Snapshot Compare

> HALOWERK medienwerk Research Publication 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 2026-10-13).

Compares two snapshots of a research publication's literal index to identify changes, gaps, or shifts in subtitle/caption coverage over time.

## Facts

- Endpoint: POST https://medien.halowerk.com/v1/baumarkt/media/research-publication-literal-index/snapshot-compare?utm_source=zero.xyz
- Price: $0.031/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-medienwerk-research-publication-literal-index-snapshot-compare-18b3f2ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4-lrwkAHzI1-wIVIqzG2d

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-research-publication-literal-index-snapshot-compare-18b3f2ad -d '<json body>'
```

Example prompt: Compare my research publication's current index snapshot against the baseline version and show me where subtitle display gaps or caption coverage differences have appeared.

## When to prefer this

Use this endpoint when you need to compare two distinct states of a research publication's literal index — particularly when auditing subtitle coverage, tracking vocabulary drift between editions, or reviewing caption display gaps against a bounded baseline. Prefer it over generic diff tools when working within the HALOWERK medienwerk publishing pipeline that uses literal-vocabulary indexing.

## Known failure modes

- Missing or malformed snapshot input returns a 400 error
- Snapshot baseline not found or incompatible format causes comparison failure
- Payment not completed via x402/USDC results in 402 Payment Required
- Caller-supplied bounds exceed allowed limits causing rejection
- Empty or unsupported document format returns parsing error

## How this service works

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

## Output

A structured JSON report showing the differences between two index snapshots, including added, removed, or changed subtitle entries, and any caption coverage gaps identified within the bounded comparison parameters.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-medienwerk-research-publication-literal-index-snapshot-compare-18b3f2ad/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)