# Transport Ridership — Duplicate Key Report + Secondary-Measure Weighted Mean

> Transport Ridership — Duplicate Key Report + Secondary-Measure Weighted Mean is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-25).

Analyzes up to 200 transport ridership records to produce a duplicate key report and a secondary-measure weighted mean, using local analytical engines with no external lookups.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-economics-05-067?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/transport-ridership-duplicate-key-report-secondary-measure-weighted-180fef62
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qMcSavRuGMzUvLYsQH5au

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 transport-ridership-duplicate-key-report-secondary-measure-weighted-180fef62 -d '<json body>'
```

Example prompt: Check my transit ridership data for duplicate row IDs and compute the weighted mean of passenger_count weighted by service_count — here are my records: row-1, group-a, 2026-10-01, passenger_count=10, service_count=1; row-2, group-b, 2026-10-02, passenger_count=20, service_count=2; row-3, group-a, 2026-10-03, passenger_count=15, service_count=3.

## When to prefer this

Choose this endpoint when you need to simultaneously audit a transport ridership dataset for duplicate row keys AND compute a secondary-measure weighted mean in a single call, without sending data to external systems. Best suited for batch sizes up to 200 rows where offline, local computation is preferred and both data quality checking and statistical aggregation are needed together.

## Known failure modes

- Fewer than 1 row submitted — returns validation error
- More than 200 rows submitted — request rejected, exceeds limit
- Invalid date format (not YYYY-MM-DD) — schema validation failure
- Missing required fields (row_id, region, date) — rejected with error
- Null values for both passenger_count and service_count — weighted mean may be undefined or NaN
- Invalid field enum value (not passenger_count or service_count) — schema error

## How this service works

Transport ridership — Duplicate key report + Secondary-measure weighted mean: Duplicate key report + Secondary-measure weighted mean for supplied transport ridership records (passenger_count, service_count). 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 reports: (1) a duplicate key report listing any row_id values that appear more than once in the submitted records, and (2) a secondary-measure weighted mean for the selected field (passenger_count or service_count), weighted by the other measure — all computed locally without external data access.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/transport-ridership-duplicate-key-report-secondary-measure-weighted-180fef62/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)