# Release Change Type Cross-Validation Baseline Evaluator

> Release Change Type Cross-Validation Baseline Evaluator 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).

Runs a grouped three-fold cross-validation using a naive-Bayes classifier on up to 200 labelled release change records to evaluate text classification accuracy across feature, fix, documentation, and maintenance categories.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-ml-release-change-cross-validation?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/release-change-type-cross-validation-baseline-evaluator-e8702d88
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qEom7n1fVq7Rz9K84tBm8

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 release-change-type-cross-validation-baseline-evaluator-e8702d88 -d '<json body>'
```

Example prompt: Run a grouped three-fold baseline cross-validation on these 12 labelled release change records — each tagged as feature, fix, documentation, or maintenance — and tell me how accurately the naive-Bayes model performs across the folds.

## When to prefer this

Choose this endpoint when you need a fast, cheap ($0.01 USDC) sanity-check on whether a small set of labelled release change texts (up to 200 records) is classifiable using a simple naive-Bayes model with grouped three-fold cross-validation — without needing a hosted model, foundation model, or external ML infrastructure. It is ideal for label quality validation or quick baseline benchmarking before committing to more expensive model training.

## Known failure modes

- Fewer than 2 records supplied causing a validation error
- Records missing required fields (id, text, actual) returning a 400 error
- More than 200 records supplied exceeding the maximum and being rejected
- Imbalanced classes with very few samples per category leading to unreliable fold metrics
- Insufficient class representation across folds preventing proper grouped splitting
- Payment not fulfilled via x402 protocol returning a 402 error

## How this service works

Release change - Grouped three-fold baseline evaluation: Grouped three-fold baseline evaluation for Release change. 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

A grouped three-fold cross-validation result using a naive-Bayes baseline classifier, including per-fold and aggregate accuracy or performance metrics across the four release change categories (feature, fix, documentation, maintenance), delivered as a single bounded evaluation report.

## 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": [
       "feature",
       "fix",
       "documentation",
       "maintenance"
      ],
      "type": "string"
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "id": "example-0-0",
     "text": "feature sample document number 0 for this supplied dataset.",
     "actual": "feature"
    },
    {
     "id": "example-0-1",
     "text": "feature sample document number 1 for this supplied dataset.",
     "actual": "feature"
    },
    {
     "id": "example-0-2",
     "text": "feature sample document number 2 for this supplied dataset.",
     "actual": "feature"
    },
    {
     "id": "example-1-0",
     "text": "fix sample document number 0 for this supplied dataset.",
     "actual": "fix"
    },
    {
     "id": "example-1-1",
     "text": "fix sample document number 1 for this supplied dataset.",
     "actual": "fix"
    },
    {
     "id": "example-1-2",
     "text": "fix sample document number 2 for this supplied dataset.",
     "actual": "fix"
    },
    {
     "id": "example-2-0",
     "text": "documentation sample document number 0 for this supplied dataset.",
     "actual": "documentation"
    },
    {
     "id": "example-2-1",
     "text": "documentation sample document number 1 for this supplied dataset.",
     "actual": "documentation"
    },
    {
     "id": "example-2-2",
     "text": "documentation sample document number 2 for this supplied dataset.",
     "actual": "documentation"
    },
    {
     "id": "example-3-0",
     "text": "maintenance sample document number 0 for this supplied dataset.",
     "actual": "maintenance"
    },
    {
     "id": "example-3-1",
     "text": "maintenance sample document number 1 for this supplied dataset.",
     "actual": "maintenance"
    },
    {
     "id": "example-3-2",
     "text": "maintenance sample document number 2 for this supplied dataset.",
     "actual": "maintenance"
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/release-change-type-cross-validation-baseline-evaluator-e8702d88/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)