# Product Feature Telemetry – Adjacent Row Changes

> Product Feature Telemetry – 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 2026-10-16).

Computes adjacent row-to-row changes for product feature telemetry data (events or unique users) across up to 200 typed records, returning a local descriptive analytics report.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-analytics-feature-telemetry-period-change?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/product-feature-telemetry-adjacent-row-changes-fa7376c0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BLmby13uSOonaSAntYQsz

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 product-feature-telemetry-adjacent-row-changes-fa7376c0 -d '<json body>'
```

Example prompt: I have daily telemetry rows for two features — 'group-a' and 'group-b' — with events ranging from 10 to 30 across four dates in October 2026; can you run an adjacent row changes report on the events field to show me how usage shifted day by day?

## When to prefer this

Use this endpoint when you have sequential product feature telemetry records and need a fast, local descriptive analytics report showing how a numeric metric (events or unique users) changed between adjacent rows. It is ideal for period-over-period delta computation without needing external data enrichment, forecasting, or aggregation across non-adjacent rows.

## Known failure modes

- Fewer than 1 row provided — minimum 1 row required
- More than 200 rows submitted — request will be rejected
- Row missing required fields (row_id, feature, date, events, unique_users)
- Invalid date format (must match YYYY-MM-DD pattern)
- Invalid field value — must be 'events' or 'unique_users'
- Numeric values outside allowed range (-1T to +1T)
- Payment not included or insufficient — x402 payment of 0.01 USDC required

## How this service works

Product feature telemetry - Adjacent row changes: Adjacent row changes for Product feature telemetry. 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 adjacent row changes report.

## Output

A bounded adjacent row changes report showing the computed delta between each consecutive pair of telemetry rows for the specified metric field (events or unique_users), covering up to 200 input records with no enrichment or forecasting applied.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/product-feature-telemetry-adjacent-row-changes-fa7376c0/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)