# Controller Sampling — Category Frequencies + Adjacent Row Changes

> Controller Sampling — Category Frequencies + 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 2026-10-22).

Analyzes controller sampling records to produce two reports: category frequency counts by game area and adjacent-row delta changes for input latency or sample count metrics.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-game-15-104?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/controller-sampling-category-frequencies-adjacent-row-changes-1fb94cb1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K-skV9O4T75lGgdF1jjqX

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 controller-sampling-category-frequencies-adjacent-row-changes-1fb94cb1 -d '<json body>'
```

Example prompt: I have controller sampling records with game areas like 'group-a' and 'group-b' across several dates — can you run a category frequency count and adjacent row change analysis on the input_latency_ms values for up to 200 rows?

## When to prefer this

Choose this endpoint when you have tabular controller sampling data with game area categories and want two complementary local analyses — frequency distribution by category and sequential row-level deltas — in a single low-cost call without needing external lookups or predictions.

## Known failure modes

- Missing required fields (row_id, game_area, date, input_latency_ms, sample_count) cause validation errors
- Input array exceeding 200 rows is rejected
- Invalid date format (non-YYYY-MM-DD) causes schema validation failure
- Numeric values outside allowed range trigger input rejection
- Payment failure via x402 protocol prevents processing

## How this service works

Controller sampling — Category frequencies + Adjacent row changes: Category frequencies + Adjacent row changes for supplied controller sampling records (input_latency_ms, sample_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

Two structured analytical reports: (1) category frequency counts showing how many rows belong to each game_area grouping, and (2) adjacent row change values showing the difference in the selected numeric field (input_latency_ms or sample_count) between each consecutive row, for up to 200 input rows.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/controller-sampling-category-frequencies-adjacent-row-changes-1fb94cb1/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)