# Cache Observations – Explicit Missing-Value Fill

> Cache Observations – 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 2026-10-18).

Fills missing numeric values (hits or misses) in up to 200 cache observation records using zero, mean, or median imputation, returning a local descriptive analytics report.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-analytics-cache-observations-fill-missing?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cache-observations-explicit-missing-value-fill-54f06d48
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ige-KlPrF0TOhSW_XSfT2

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 cache-observations-explicit-missing-value-fill-54f06d48 -d '<json body>'
```

Example prompt: I have 4 cache observation records for group-a and group-b from 2026-10-01 to 2026-10-04, but some hits values are null — can you fill those missing hits values using the median method and give me the cleaned dataset?

## When to prefer this

Choose this endpoint when you have up to 200 cache observation records with null hits or misses values and need a simple, local imputation (zero, mean, or median) with a descriptive analytics report — no external data enrichment or forecasting required. Prefer this over general-purpose data cleaning tools when the domain is specifically cache hit/miss metrics and you want a bounded, cost-predictable result for $0.01 USDC per call.

## Known failure modes

- Fewer than 1 row submitted returns a validation error
- More than 200 rows submitted exceeds the maxItems limit
- Invalid date format (not YYYY-MM-DD) causes a schema validation error
- Unrecognized field value (not 'hits' or 'median') causes enum validation failure
- Unrecognized method value (not 'zero', 'mean', 'median') causes enum validation failure
- Missing required fields (row_id, cache, date, hits, misses) cause record-level validation errors
- All values already present with no nulls returns a fill report with no changes applied

## How this service works

Cache observations - Explicit missing-value fill: Explicit missing-value fill for Cache observations. 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 explicit missing-value fill report.

## Output

Returns a bounded report containing the input cache observation records with all null or missing values for the specified field (hits or misses) replaced using the chosen method (zero, mean, or median), along with a local descriptive analytics summary of the fill operation. No external enrichment or forecasting is included.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cache-observations-explicit-missing-value-fill-54f06d48/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)