# Lead Stage Grouped Three-Fold Baseline Evaluation

> Lead Stage 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 2026-10-15).

Runs a grouped three-fold cross-validation using a naive-Bayes classifier on up to 200 labelled lead-stage text records across four CRM stages (enquiry, qualified, negotiation, closed).

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-ml-lead-stage-cross-validation?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lead-stage-grouped-three-fold-baseline-evaluation-2ba16cf7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9z-HeLMGpCFLWgsCiFrb3

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 lead-stage-grouped-three-fold-baseline-evaluation-2ba16cf7 -d '<json body>'
```

Example prompt: Run a grouped three-fold baseline evaluation on my 150 labelled lead stage records — each record has an ID, a short text description, and one of these labels: enquiry, qualified, negotiation, or closed — and tell me how well a naive-Bayes classifier performs across the folds.

## When to prefer this

Choose this endpoint when you need a fast, cheap ($0.01 USDC) sanity-check or baseline evaluation of text classification quality for CRM lead stage data specifically, without needing a hosted or foundation model. It is ideal for validating dataset quality, testing label consistency, or establishing a naive-Bayes benchmark before investing in more expensive ML infrastructure. Use it over general ML APIs when your labels map to the specific four-class lead funnel (enquiry, qualified, negotiation, closed) and you want local, reproducible cross-validation results.

## Known failure modes

- Fewer than 2 records supplied — minimum item count not met
- Records missing required fields (id, text, actual) — validation error
- More than 200 records submitted — exceeds maxItems limit
- Invalid label value outside enum (enquiry, qualified, negotiation, closed) — schema rejection
- Insufficient class representation for cross-validation folds — evaluation may be unreliable or fail
- Payment not included or insufficient — x402 payment required error

## How this service works

Lead stage - Grouped three-fold baseline evaluation: Grouped three-fold baseline evaluation for Lead stage. 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 a grouped three-fold cross-validation result including per-fold and aggregate accuracy metrics from a naive-Bayes baseline classifier applied to the supplied labelled text records across the four lead stages (enquiry, qualified, negotiation, closed). No hosted or foundation model is used; computation is local.

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lead-stage-grouped-three-fold-baseline-evaluation-2ba16cf7/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)