# API Contracts — Duplicate Key Report + Adjacent Row Changes

> API Contracts — Duplicate Key Report + Adjacent Row Changes is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).

Analyzes up to 200 API contract records to produce a duplicate key report and adjacent row change analysis for fields_checked and incompatible_fields.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-software-19-062?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-contracts-duplicate-key-report-adjacent-row-changes-bc218356
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_upLjrxseDc57T_LK56aR2

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 api-contracts-duplicate-key-report-adjacent-row-changes-bc218356 -d '<json body>'
```

Example prompt: Can you run a duplicate key report and adjacent row changes analysis on these API contract records — checking the fields_checked column — for 4 rows with components group-a and group-b dated 2026-10-01 through 2026-10-04?

## When to prefer this

Choose this endpoint when you need simultaneous duplicate-key detection and row-to-row change analysis on API contract records in a single low-cost call. It is purpose-built for the api_contracts domain with a fixed schema, making it preferable over general-purpose data tools when your data already matches the expected fields (row_id, component, date, fields_checked, incompatible_fields) and you want both reports bundled for $0.01 USDC.

## Known failure modes

- Input exceeds 200 rows — request rejected
- Missing required fields (row_id, component, date, fields_checked, incompatible_fields) cause validation error
- Invalid date format (non-YYYY-MM-DD) rejected by pattern constraint
- Numeric values outside allowed range (-1e12 to 1e12) rejected
- Empty rows array rejected (minItems: 1)
- Invalid field enum value causes schema validation failure

## How this service works

API contracts — Duplicate key report + Adjacent row changes: Duplicate key report + Adjacent row changes for supplied api contracts records (fields_checked, incompatible_fields). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.

## Output

Returns two independent analytical reports: (1) a duplicate key report identifying any rows with repeated key values across the dataset, and (2) an adjacent row changes report showing value deltas between consecutive rows for the selected numeric field (fields_checked or incompatible_fields). Up to 200 rows processed per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "component",
     "date",
     "fields_checked",
     "incompatible_fields"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "component": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "fields_checked": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "incompatible_fields": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "component": "group-a",
     "fields_checked": 10,
     "incompatible_fields": 1
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "component": "group-b",
     "fields_checked": 20,
     "incompatible_fields": 2
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "component": "group-a",
     "fields_checked": 15,
     "incompatible_fields": 3
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "component": "group-b",
     "fields_checked": 30,
     "incompatible_fields": 4
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "fields_checked",
    "incompatible_fields"
   ],
   "type": "string",
   "default": "fields_checked"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-contracts-duplicate-key-report-adjacent-row-changes-bc218356/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)