# HALOWERK buerowerk — Meeting Legal Evidence Snapshot Compare

> HALOWERK buerowerk — Meeting Legal Evidence Snapshot Compare is a paid API for AI agents from buero.halowerk.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-14).

Compares a current meeting transcript/notes snapshot against a baseline to detect changes in summaries, topics, decisions, action items, and open questions for legal evidence purposes.

## Facts

- Endpoint: POST https://buero.halowerk.com/v1/baumarkt/meeting/legal-evidence-literals-source-note-register/snapshot-compare?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-buerowerk-meeting-legal-evidence-snapshot-compare-146d0b21
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XSSE167BIhHRTac9VByVA

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-buerowerk-meeting-legal-evidence-snapshot-compare-146d0b21 -d '<json body>'
```

Example prompt: Compare my original meeting notes (baseline) against the updated version — both include transcript segments and structured notes with summaries, decisions, action items, and open questions — and tell me exactly what changed between the two snapshots for legal evidence purposes.

## When to prefer this

Choose this endpoint when you need a structured, legally-oriented diff between two versions of meeting notes or transcripts — particularly when audit trail integrity, tamper detection, or regulatory compliance is required. It is specifically designed for legal evidence scenarios with rich structured note schemas (summaries, decisions, action items with owners and due dates), making it superior to generic document diff tools when meeting governance context matters.

## Known failure modes

- Missing required baseline source (neither segments nor transcript_package provided) — validation error
- Notes object missing required fields (summary, topics, decisions, action_items, open_questions) — schema error
- Summary array empty (minItems:1 violated) — validation error
- Array length exceeds maxItems:30 — truncation or rejection error
- Payment not processed via x402 — 402 Payment Required response
- Malformed segment references — index out of bounds error
- Invalid USDC payment on Base Mainnet — payment failure

## How this service works

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

## Output

A JSON comparison result detailing differences between the baseline and current meeting snapshot, including changed or added summary lines, topics, decisions, action items (with owner and due date changes), and open questions — formatted for legal evidence documentation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "baseline": {
   "type": "object",
   "required": [
    "source",
    "notes"
   ],
   "properties": {
    "notes": {
     "type": "object",
     "required": [
      "summary",
      "topics",
      "decisions",
      "action_items",
      "open_questions"
     ],
     "properties": {
      "topics": {
       "type": "array",
       "items": {
        "$ref": "#/$defs/ma5dd9d00ff"
       },
       "maxItems": 30
      },
      "summary": {
       "type": "array",
       "items": {
        "$ref": "#/$defs/ma5dd9d00ff"
       },
       "maxItems": 30,
       "minItems": 1
      },
      "decisions": {
       "type": "array",
       "items": {
        "$ref": "#/$defs/ma5dd9d00ff"
       },
       "maxItems": 30
      },
      "action_items": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "text",
         "quote",
         "segment_index",
         "owner",
         "due_raw"
        ],
        "properties": {
         "text": {
          "type": "string",
          "maxLength": 1000,
          "minLength": 1
         },
         "owner": {
          "type": [
           "string",
           "null"
          ],
          "maxLength": 80
         },
         "quote": {
          "type": "string",
          "maxLength": 3000,
          "minLength": 1
         },
         "due_raw": {
          "type": [
           "string",
           "null"
          ],
          "maxLength": 3000
         },
         "segment_index": {
          "type": "integer",
          "minimum": 0
         }
        }
       },
       "maxItems": 30
      },
      "open_questions": {
       "type": "array",
       "items": {
        "$ref": "#/$defs/ma5dd9d00ff"
       },
       "maxItems": 30
      }
     }
    },
    "source": {
     "type": "object",
     "oneOf": [
      {
       "required": [
        "segments"
       ]
      },
      {
       "required": [
        "transcript_package"
       ]
      }
     ],
     "required": [],
     "properties": {
      "segments": {
       "$ref": "#/$defs/mbdf0d3bb9b"
      },
      "transcript_package": {
       "$ref": "#/$defs/m81f20e3330"
      }
     },
     "additionalProperties": false
    }
   }
  },
  "segments": {
   "$ref": "#/$defs/mbdf0d3bb9b"
  },
  "transcript_package": {
   "$ref": "#/$defs/m81f20e3330"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-buerowerk-meeting-legal-evidence-snapshot-compare-146d0b21/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from buero.halowerk.com](https://www.zero.xyz/host/buero.halowerk.com/llms.txt)