# HALOWERK CUE SHA-256 Snapshot Compare

> HALOWERK CUE SHA-256 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 2026-10-10).

Registers a SHA-256 content hash snapshot and compares it against a previously stored snapshot to detect changes in media content.

## Facts

- Endpoint: POST https://medien.halowerk.com/v1/baumarkt/media/cue-sha256-register/snapshot-compare?utm_source=zero.xyz
- Price: $0.031/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-cue-sha-256-snapshot-compare-e7966010
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p02suHpPLLDcuikAW0BA5

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-cue-sha-256-snapshot-compare-e7966010 -d '<json body>'
```

Example prompt: Register the SHA-256 hash of this media file and compare it against the snapshot I stored last week — tell me if anything has changed or if the content is still identical.

## When to prefer this

Choose this endpoint when you need hash-level content integrity verification for media assets and want to compare a current SHA-256 snapshot against a previously registered baseline. It is ideal for detecting unauthorized modifications, auditing content drift over time, or enforcing tamper-evidence in media pipelines. Prefer it over full perceptual image comparison (available as a sibling endpoint) when you need cryptographic precision rather than visual similarity scoring.

## Known failure modes

- No prior snapshot found for the given content identifier — returns an error or empty comparison
- Invalid or malformed SHA-256 hash submitted — returns a validation error
- Content identifier not previously registered — comparison cannot be performed
- Network timeout or service unavailability — returns HTTP 5xx
- Payment not processed via x402 — request rejected before processing

## How this service works

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

## Output

A JSON object containing the comparison outcome between the submitted SHA-256 hash snapshot and the previously registered one, including whether the hashes match, any detected delta or change indicator, a confidence band on the result, and metadata about the registered snapshot timestamps.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-cue-sha-256-snapshot-compare-e7966010/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)