# Library Circulation Duplicate Key Report

> Library Circulation Duplicate Key Report is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Identifies duplicate row keys in a batch of library circulation records (checkouts and renewals by branch and date)

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-analytics-library-circulation-key-duplicates?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/library-circulation-duplicate-key-report-00dfdc6f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eXbPkevbAmEgNbHPf2PX5

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 library-circulation-duplicate-key-report-00dfdc6f -d '<json body>'
```

Example prompt: Check this batch of library circulation records for duplicate row IDs — I have up to 200 rows, each with a row_id, branch name, date, checkout count, and renewal count, and I need a report of any keys that appear more than once.

## When to prefer this

Choose this endpoint when you need a fast, low-cost ($0.01 USDC) duplicate key check on a small-to-medium batch of library circulation records (up to 200 rows). It is ideal for pre-validation before importing or reporting circulation data, where you want to catch repeated row IDs across branches and dates without needing enrichment, forecasting, or external data lookups.

## Known failure modes

- Missing required fields (row_id, branch, date, checkouts, renewals) cause validation errors
- Submitting more than 200 rows exceeds the maxItems limit and will be rejected
- Invalid date format (not YYYY-MM-DD) triggers a schema validation error
- Empty rows array (minItems: 1) returns an error
- Non-numeric values for checkouts or renewals where numbers are expected cause type errors

## How this service works

Library circulation - Duplicate key report: Duplicate key report for Library circulation. Up to 200 supplied typed records. Local descriptive analytics; no enrichment or forecast. One of 25 new profiles across 20 shared operations in this industry. 0.01 USDC includes one bounded duplicate key report report.

## Output

A bounded duplicate key report listing any row_id values that appear more than once within the supplied batch of up to 200 library circulation records, enabling local data quality validation without enrichment or forecasting.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/library-circulation-duplicate-key-report-00dfdc6f/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)