# Physics Scenes – Keyed Dataset Comparison + Explicit Missing-Value Fill

> Physics Scenes – Keyed Dataset Comparison + Explicit Missing-Value Fill is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Compares two keyed physics simulation datasets (body_count or step_ms) row-by-row and fills in missing values, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-game-08-190?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/physics-scenes-keyed-dataset-comparison-explicit-missing-value-fill-ea84defc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BpTMBO0qdEee2_1a2iSZ8

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 physics-scenes-keyed-dataset-comparison-explicit-missing-value-fill-ea84defc -d '<json body>'
```

Example prompt: Compare my two physics scene datasets on body_count — the primary set has rows for group-a and group-b from 2026-10-01 through 2026-10-04, and the secondary set has the same row IDs but slightly different body_count values — fill any missing values and give me two reports showing where they differ.

## When to prefer this

Choose this endpoint when you have two sets of physics scene records (with body_count and/or step_ms) keyed by row_id that you want to compare side-by-side and fill missing values in, especially for game simulation QA, build-over-build auditing, or data reconciliation workflows. Best for structured, tabular physics data up to 200 rows where you need both a difference report and a null-fill report in one call for $0.01 USDC.

## Known failure modes

- Exceeds 200-row limit — request rejected or truncated
- Invalid date format (not YYYY-MM-DD) — validation error
- row_id missing or empty — schema validation failure
- field value not in enum [body_count, step_ms] — error returned
- Numeric values outside allowed range — rejected
- Empty rows array — schema minimum violation

## How this service works

Physics scenes — Keyed dataset comparison + Explicit missing-value fill: Keyed dataset comparison + Explicit missing-value fill for supplied physics scenes records (body_count, step_ms). 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 analytical reports: (1) a keyed row-by-row comparison of the chosen numeric field (body_count or step_ms) across the primary and secondary datasets, highlighting differences per row_id and game_area; (2) an explicit missing-value fill report showing which values were null and what they were filled with. Covers up to 200 rows using local analytical engines with no external lookups.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/physics-scenes-keyed-dataset-comparison-explicit-missing-value-fill-ea84defc/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)