# HALOWERK medienwerk – Research Hypothesis Literal Index Snapshot Compare

> HALOWERK medienwerk – Research Hypothesis 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 2026-10-22).

Compares two snapshots of a literal-index built from research hypothesis terms to surface additions, removals, or shifts in indexed vocabulary over time.

## Facts

- Endpoint: POST https://medien.halowerk.com/v1/baumarkt/media/research-hypothesis-literal-index/snapshot-compare?utm_source=zero.xyz
- Price: $0.031/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-medienwerk-research-hypothesis-literal-index-snapshot-compare-5c73d221
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WzEw0_fCb0rN9BpAah3cm

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-hypothesis-literal-index-snapshot-compare-5c73d221 -d '<json body>'
```

Example prompt: Compare my two research hypothesis index snapshots — the baseline from last week and today's updated version — and show me which literal terms were added, removed, or shifted between them.

## When to prefer this

Choose this endpoint when you need a precise, literal-vocabulary diff between two discrete index states built from research hypotheses — particularly for editorial, publishing, or research workflows where exact term tracking matters. Prefer this over general text-diff tools when the domain is hypothesis-indexed media content and you need structured JSON output rather than a plain text patch.

## Known failure modes

- Missing or invalid snapshot references return an error indicating unresolvable identifiers
- Snapshots that are identical return an empty diff with no changes listed
- Malformed literal index input may result in a parsing error
- Exceeding payload size limits for large index snapshots returns a 413 or equivalent error
- Payment failure via x402 results in a 402 response before processing begins

## How this service works

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

## Output

A JSON object containing a structured diff between two literal-index snapshots: lists of added terms, removed terms, and optionally modified or shifted entries, enabling the caller to understand exactly how the hypothesis-driven index vocabulary changed between the two points in time.

## 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/halowerk-medienwerk-research-hypothesis-literal-index-snapshot-compare-5c73d221/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)