# medien.halowerk.com Subtitle Cue-Gap Index Snapshot Compare

> medien.halowerk.com Subtitle Cue-Gap 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 2026-10-20).

Compares a current subtitle/caption cue-gap index snapshot against a caller-supplied baseline snapshot to identify exact changes in caption coverage gaps.

## Facts

- Endpoint: POST https://medien.halowerk.com/v1/baumarkt/media/cue-gap-index/snapshot-compare?utm_source=zero.xyz
- Price: $0.031/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/medien-halowerk-com-subtitle-cue-gap-index-snapshot-compare-767ce78c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s4dkMNoNZqNsUVKvXZPyK

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 medien-halowerk-com-subtitle-cue-gap-index-snapshot-compare-767ce78c -d '<json body>'
```

Example prompt: Compare our current subtitle cue-gap index for this video against the baseline snapshot I saved last week and tell me exactly which caption coverage gaps have appeared or disappeared.

## When to prefer this

Use this endpoint when you need to detect precise changes in subtitle or caption gap coverage between a known baseline and the current state of a media asset, particularly for QC workflows, accessibility audits, or regression testing after caption edits or re-encoding. Prefer this over general diff tools because it is purpose-built for subtitle cue timing and gap semantics.

## Known failure modes

- Baseline snapshot not provided or malformed — returns validation error
- Current media source unreachable — returns fetch error
- Timing bounds out of range — returns bounds error
- Baseline format incompatible with current index structure — returns schema mismatch error
- Media file has no subtitle track — returns empty cue index

## How this service works

Compare Index subtitle display gaps for caption coverage review. against a bounded caller-supplied previous snapshot and return exact change witnesses. Baseline is caller supplied and is never authenticated as historical server output. Pure bounded timing/source-quote validation runs before payment. Exactly one current motor call, zero baseline provider calls. Full current provider disclosure retained; baseline is not submitted to the provider.

## Output

A JSON response listing exact change witnesses — additions, removals, or shifts in subtitle/caption cue gaps — between the current provider-fetched index and the caller-supplied baseline snapshot, with timing and source-quote details for each detected change.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "source": {
   "type": "object",
   "oneOf": [
    {
     "required": [
      "url"
     ]
    },
    {
     "required": [
      "content_base64"
     ]
    }
   ],
   "properties": {
    "url": {
     "type": "string",
     "pattern": "^https?://",
     "maxLength": 2048
    },
    "filename": {
     "type": "string",
     "maxLength": 260
    },
    "content_base64": {
     "type": "string",
     "maxLength": 12000000,
     "minLength": 4
    }
   },
   "additionalProperties": false
  },
  "baseline": {
   "type": "object",
   "required": [
    "words",
    "media"
   ],
   "properties": {
    "cues": {
     "type": "array",
     "items": {
      "type": "object"
     },
     "maxItems": 20000,
     "minItems": 1
    },
    "media": {
     "type": "object",
     "required": [
      "duration_seconds"
     ],
     "properties": {
      "duration_seconds": {
       "type": "number",
       "maximum": 1800,
       "exclusiveMinimum": 0
      }
     }
    },
    "words": {
     "type": "array",
     "items": {
      "type": "object",
      "required": [
       "word",
       "start",
       "end",
       "speaker"
      ],
      "properties": {
       "end": {
        "type": "number",
        "maximum": 1800.5,
        "exclusiveMinimum": 0
       },
       "word": {
        "type": "string",
        "maxLength": 3000,
        "minLength": 1
       },
       "start": {
        "type": "number",
        "maximum": 1800.5,
        "minimum": 0
       },
       "speaker": {
        "type": [
         "integer",
         "null"
        ],
        "minimum": 0
       },
       "confidence": {
        "type": [
         "number",
         "null"
        ],
        "maximum": 1,
        "minimum": 0
       }
      },
      "additionalProperties": false
     },
     "maxItems": 20000,
     "minItems": 1
    }
   }
  },
  "language": {
   "enum": [
    "de",
    "en",
    "es",
    "fr",
    "it",
    "nl",
    "pt",
    "multi"
   ],
   "type": "string"
  },
  "duration_minutes": {
   "type": "integer",
   "maximum": 30,
   "minimum": 1
  },
  "confidence_threshold": {
   "type": "number",
   "maximum": 1,
   "minimum": 0
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/medien-halowerk-com-subtitle-cue-gap-index-snapshot-compare-767ce78c/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)