# Energy Readings Secondary-Measure Weighted Mean

> Energy Readings 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 2026-10-19).

Computes a secondary-measure weighted mean (e.g. cost-weighted kWh or kWh-weighted cost) across up to 200 energy meter readings, returning a single weighted average value.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-analytics-energy-readings-weighted-average?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/energy-readings-secondary-measure-weighted-mean-e45accd3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0vFZX_3BSq3XxxUcg7zOi

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 energy-readings-secondary-measure-weighted-mean-e45accd3 -d '<json body>'
```

Example prompt: Calculate the cost-weighted mean kWh for these energy readings — I have meter records for group-a and group-b from October 2026, with kWh and cost values per day, and I want the secondary-measure weighted average using 'cost' as the weight field.

## When to prefer this

Choose this endpoint when you need a statistically correct secondary-measure weighted mean for energy meter data — specifically when averaging one energy metric (kWh or cost) weighted by the other, across up to 200 typed records, with local numeric and data-quality processing and no external dependencies. Prefer it over simple arithmetic averages when the weight of each reading matters, and over general analytics APIs when working specifically with date-keyed, meter-grouped energy consumption records.

## Known failure modes

- Missing required fields (row_id, meter, date, kwh, cost) causes validation error
- Exceeding 200 row limit returns rejection
- Invalid date format (not YYYY-MM-DD) causes schema error
- Null values in both the value and weight fields may produce undefined or null result
- Invalid field enum value (not 'kwh' or 'cost') causes validation failure
- Payment not included or insufficient USDC causes x402 payment-required response

## How this service works

Energy readings - Secondary-measure weighted mean: Secondary-measure weighted mean for Energy readings. Up to 200 supplied typed records. Local numeric and data-quality processing; no external enrichment or forecasting. One of 25 profiles or calculations across 20 shared operations in this sector. 0.01 USDC includes one bounded secondary-measure weighted mean deliverable.

## Output

A single weighted mean value computed from the submitted energy readings, where one numeric field (kWh or cost) is averaged using the other as weights — returned as a bounded numeric deliverable with local data-quality processing applied.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/energy-readings-secondary-measure-weighted-mean-e45accd3/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)