# Review Aspect Grouped Three-Fold Baseline Evaluation

> Review Aspect Grouped Three-Fold Baseline Evaluation is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Runs a grouped three-fold cross-validation using a naive-Bayes classifier on up to 200 labelled review-aspect text records (performance, appearance, value, other) and returns baseline evaluation metrics.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-ml-review-aspect-cross-validation?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/review-aspect-grouped-three-fold-baseline-evaluation-797c271d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_S97ZdsAU0Oll42BaxX_4Z

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 review-aspect-grouped-three-fold-baseline-evaluation-797c271d -d '<json body>'
```

Example prompt: Can you run a grouped three-fold baseline cross-validation on my labelled review dataset? I have 12 records covering performance, appearance, value, and other aspects — here they are with their IDs and labels.

## When to prefer this

Choose this endpoint when you have a small labelled dataset (up to 200 records) of review-aspect text and need a quick, cheap ($0.01) baseline evaluation using grouped three-fold cross-validation with a naive-Bayes model. Ideal for validating label quality, sanity-checking class separability, or establishing a baseline before investing in larger model training. Not suitable if you need a hosted model, deep-learning embeddings, or evaluation on more than 200 records.

## Known failure modes

- Fewer than 2 records supplied — minimum input requirement not met
- Records missing required fields (id, text, actual) — schema validation failure
- Text field exceeds 1000 characters per record — truncation or rejection
- More than 200 records supplied — exceeds maximum item limit
- Invalid enum value in 'actual' field (must be performance, appearance, value, or other)
- Insufficient class representation across folds for meaningful cross-validation — may produce degenerate metrics
- Payment failure via x402 protocol — endpoint returns 402 without processing

## How this service works

Review aspect - Grouped three-fold baseline evaluation: Grouped three-fold baseline evaluation for Review aspect. Up to 200 supplied labelled text records. Local dataset tools, evaluation and small naive-Bayes baselines; no hosted model or foundation-model training. One of 25 profiles or calculations across 20 shared operations in this sector. 0.01 USDC includes one bounded grouped three-fold baseline evaluation deliverable.

## Output

Returns grouped three-fold cross-validation results from a naive-Bayes baseline model trained on the supplied labelled records, including per-fold and aggregate accuracy or classification metrics across the four review-aspect classes (performance, appearance, value, other). No hosted model is created; output is a one-time bounded evaluation deliverable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "records": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "id",
     "text",
     "actual"
    ],
    "properties": {
     "id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "text": {
      "type": "string",
      "default": "",
      "maxLength": 1000
     },
     "actual": {
      "enum": [
       "performance",
       "appearance",
       "value",
       "other"
      ],
      "type": "string"
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "id": "example-0-0",
     "text": "performance sample document number 0 for this supplied dataset.",
     "actual": "performance"
    },
    {
     "id": "example-0-1",
     "text": "performance sample document number 1 for this supplied dataset.",
     "actual": "performance"
    },
    {
     "id": "example-0-2",
     "text": "performance sample document number 2 for this supplied dataset.",
     "actual": "performance"
    },
    {
     "id": "example-1-0",
     "text": "appearance sample document number 0 for this supplied dataset.",
     "actual": "appearance"
    },
    {
     "id": "example-1-1",
     "text": "appearance sample document number 1 for this supplied dataset.",
     "actual": "appearance"
    },
    {
     "id": "example-1-2",
     "text": "appearance sample document number 2 for this supplied dataset.",
     "actual": "appearance"
    },
    {
     "id": "example-2-0",
     "text": "value sample document number 0 for this supplied dataset.",
     "actual": "value"
    },
    {
     "id": "example-2-1",
     "text": "value sample document number 1 for this supplied dataset.",
     "actual": "value"
    },
    {
     "id": "example-2-2",
     "text": "value sample document number 2 for this supplied dataset.",
     "actual": "value"
    },
    {
     "id": "example-3-0",
     "text": "other sample document number 0 for this supplied dataset.",
     "actual": "other"
    },
    {
     "id": "example-3-1",
     "text": "other sample document number 1 for this supplied dataset.",
     "actual": "other"
    },
    {
     "id": "example-3-2",
     "text": "other sample document number 2 for this supplied dataset.",
     "actual": "other"
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/review-aspect-grouped-three-fold-baseline-evaluation-797c271d/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)